Cat 426-7BC Backhoe Loader Electrical + Hydraulic System Schematic Manual - PDF DOWNLOAD

SENR4783 March 1990

416, 426 and 436 Series II Backhoe Loaders Electrical System 416: 5PC12000-UP

426: 7BC4000-UP

436: 5KF1000-UP

6T2665 Engine Coolant Temperature 6T4949 Backup Alarm (Pressure) 9X3269

Engine Oil Pressure (Service Meter) Engine Oil Pressure (Monitoring Circuit)

N.O. Normally Open N.C. Normally Closed

Printed in U.S.A.

20 Page

SENR4783

© 1990 Caterpillar All Rights Reserved

20 Page

SENR4783

Wire Number

Wire Color

101 102 105 112 113 116 118 119 121 123 124 128 143 157 161 194

RD BU BR PU OR BR GY PK YL WH GN PK BR YL PK GN

200

BK

304 306 307 308 309 310 311 321 322

WH GN OR YL GY PU WH BR GY

405 406 419 441 443 447 450

GY PU YL OR YL PK YL

SENR5811 December 1992

Wire Description Chart Description Power Distribution Circuits BAT HD LMP KEY SW MAIN POWER RELAY OUTPUT OPR MON PANEL B+ SWITCHED AUX CKT AUX CKT AUX CKT BACKUP ALARM TO LAMP AUX CKT A/C AUX CKT AUX CKT AUX CKT AUX CKT AUX CKT Ground Circuits MAIN CHASSIS Basic Machine Circuits STARTER RELAY NO. OUTPUT

Wire Number

Wire Color

500 501 502 503 504 505 506 513 515 516 517 520 521 522 536 537 538 552 564 568 576 577 A512

BR GN OR BR YL BU PU OR GY GN BU WH YL WH WH GN BR WH GY GN PK PU GN

603 604 605 606 607 608 610 611 614 617 618 619 634

PK OR YL GY PK GN OR PU PU BR YL GN WH

762 766

YL GN

STARTER RELAY COIL TO NEUT START SW OR KEY SW

KEY SW TO NEUT START SW MAIN POWER RELAY COIL ALTERNATOR REGULATOR TERM. START AID SW TO START AID SOL START AID SOL TO TEMP SW BCKP ALARM LAMP TRAVEL ALARM WARNING HORN (FORWARD) Monitoring Circuits OPR MON OIL PRESS. (LO SETTING) OPR MON COOLANT TEMP OPR MON PARKING BRAKE ENG COOLANT TEMP GAGE POWER TRAIN TEMP GAGE FUEL LEVEL GAGE TACH SENDER (+)

Description Accessory Circuits WIPER - FRONT (PARK) WIPER - FRONT (LO) WIPER - FRONT (HI) WIPER - REAR (PARK) WIPER - REAR (LO) WIPER - REAR (HI) WASHER - FRONT A/C COMPRESSOR/REFRIGERANT PRESS. SW BLOWER MOTOR (HI) BLOWER MOTOR (MEDIUM) BLOWER MOTOR (LO) OPR A/C SW TO THERMOSTAT/FUSE A/C SW TO REFRIGERANT SW A/C CLUTCH TO THERMOSTAT SW HAZARD SW TO TURN SW TURN SIGNAL SW TO FLASHER HAZARD INDICATOR FOUR WHEEL DRIVE SOL REAR WIPER INTERRUPT SW TO WIPER SW WARNING BUZZER TO DIODES WIPER - AUX (LO) WIPER - AUX (HI) REAR INTERRUPT SW TO WIPER MOTOR Lighting Circuits ROTARY BEACON STOP LAMP TURN LAMP - LEFT TURN LAMP - RIGHT FLOOD LAMP - FRONT FLOOD LAMP - REAR HEAD LAMP BASIC HEAD LAMP HI PARK/TAIL/DASH LAMP TAIL/POSITION LAMP - LEFT (ROAD PKG)/WIDTH TAIL/POSITION LAMP - RIGHT (ROAD PKG)/WIDTH HEAD LAMP LO HEAD LAMP SW TO WORK/HEAD LAMP JUMPER Control Circuits BUCKET POSITIONER SOL SW XMSN DISCONNECT SOL

Harness Connector Location Chart Connectors

Machine Location 1

12 Contacts

2

3

5

8 Contacts 6

7

6 Contacts 8

* 4 Contacts

* 9

Harness And/Or Components A - 9R9558

Part No.

Off Machine Switch Specifications

Function

8N1693

Coolant Temperature (Start Aid)

6T2665

Coolant Temperature

Actuate

37.8 ± 2.8°C (100 ± 5°F) 107.2 ± 2.8°C (225 ± 5°F)

Deactuate

Contact Position

26.7°C MIN (80°F MIN) 93°C MIN (196°F MIN)

Normally Closed Normally Closed

Resistor and Solenoid Specifications

Component

Part No.

Resistance (Ohms)¹

Resistor - Alternator

8C4110

22 ± 1.1

Resistor - Blower Motor Speed

7T3828

Overall 1.0 ± .1; Tap 0.5 ± .05

Solenoid - A/C Clutch

8T8812

3.5 ± 0.15

Solenoid - Bucket Positioner

9T7304

18

Solenoid - Start Aid

3T9493

1.5

¹ At room temperature.

416, 426, 428, 436 And 438 Series II Backhoe Loaders Electrical System 416: 5PC15429-UP

428: 6TC10381-UP

426: 7BC5259-UP

436: 5KF1553-UP

438: 3DJ2161-UP

Schematic Location B-9

K - 9R9557 E - 9R9541

B-7

H - 9R9544 E - 9R9541

E-3

L - 9R9543 B - 9R9551

A-8

E - 9R9541 D - 9R9549

B-4

E - 9R9541 E - 9R9541

A-6

G - 9R9542 D - 9R9549

C-4

E - 9R9541 A - 9R9558

D-3

Front Wiper Motor A - 9R9558 Rear Wiper Motor (Upper) HH - 9R9098

E-9

Printed in U.S.A.

1992 Caterpillar All Rights Reserved

F-7

JJ - 9R9443

* = Connector is located at the component.

Harness And Wire Electrical Schematic Symbols Machine Location 1

Component Location Chart Component Alarm - Backup

Schematic Location B-9

Machine Location 12

Component Solenoid - Engine Shutdown

Schematic Location D-2

A

Alarm - Fault

C-3

13

Solenoid - Front Drive

C-2

2

Alternator

C-1

14

Solenoid - Start Aid

F-2

3

Batteries

F-5

15

Solenoid - Transmission Neutralizer

C-2

C

Breaker - Running Lamp

C-8

16

Switch - Backup Alarm

C-2

A

Flasher

C

Fuse - Holders

C-9

B

Switch - Beacon

D-7

C-8, C-3

A

Switch - Blower (Heater And Air Cond)

E-3

B B

Gauge - Converter Temperature

D-8

17

Switch - Bucket Positioner

A-1

Gauge - Coolant Temperature

D-8

18

Switch - Coolant Temperature

C-2

B

Gauge - Fuel

D-9

19

Switch - Coolant Temp (Start Aid)

C-1

B

Gauge - Tachometer

D-9

20

Switch - Engine Oil Pressure

D-1

4

Horn - Forward

D-1

A

Switch - Forward Horn

C-4

B

Meter - Service

D-9

B

Switch - Front Drive

C-6

B

Meter - Volt

D-8

B

Switch - Front Wiper

C-6

A

Motor - Blower

D-3

B

Switch - Hazard

D-7

A

Motor - Fan

E-7

B

Switch - Key Start

D-8

A

Motor - Front Wiper

D-3

A

Switch - Lamp Test

C-4

A

Motor - Rear Wiper (Lower)

F-8

21

Switch - Neutral/Start

C-2

A

Motor - Rear Wiper (Upper)

E-9

22

Switch - Parking Brake

F-6

5

Motor - Starter

E-2

B

Switch - Rear Dual Wiper

D-6

C

Relay

C-8

B

Switch - Rear Flood Lamp

D-7

C

Relay - Main

C-7

23

Switch - Refrigerant

F-1

C

Relay - Start

C-7

B

Switch - Running Lamp

D-6

6

Resistor - Alternator Field

D-7

B

Switch - Start Aid

D-7

A

Resistor - Blower Motor Speed

D-3

A

Switch - Thermostat

C-3

7

Sender - Converter

C-2

A

Switch - Turn Signal

E-4

8

Sender - Coolant Temperature

C-1

24

Switches - Brake (Stop Light)

D-4

9

Sender - Fuel

A-6

A

Switches - Transmission Neutralizer

10

Solenoid - Air Conditioner Clutch

D-1

A

Switches - Wiper Disconnect

11

Solenoid - Bucket Positioner

A-4

A

Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.

Receptacle

Plug 2

Pressure Symbol

9 3 8

6

A 5

1

1

2

B

6

C

13

24 16

7

Pin or Socket Number

Flow Symbol

Wire, Cable, or Harness Assembly Identification

8

2

21

Level Symbol

4

10

7 15

20

5 12

14

Temperature Symbol

18

19

17

23

C

Normally open switch that will close with an increase of a specific condition (temp-press-etc.).

11

A

A 325-PK-14

9

Pin

AA 1

Normally closed switch that will open with an increase of a specific condition.

9 B 1

C

2

6

22

B = Components in operator compartment - Right console.

1

6 5

8 7

11

16

15

24 21

7

9 3

12

14 5

10

18

4

19

2

REED SWITCH - A switch whose contacts are controlled by a magnet. A magnet closes the contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.

23 13

No circle indicates that the wire cannot be disconnected from the component.

T

Machine Harness Connector and Component Locations

Wire Gauge

FUSE - A component in an electrical circuit that will open the circuit if too much current flows through it.

The circle indicates that the component has screw terminals and a wire can be disconnected from it.

8 20

200-BK-14

Electrical Schematic Symbols And Definitions

17

3

325-PK-14

Circuit Number Identification

Normally closed switch that is open due to an applied condition, and will close again with a specific decrease in that condition.

A

9X-1123

Wire Color

Socket

2

D-6, D-4

Component Part Number

Single Wire Connector

Normally open switch that is closed due to an applied condition, and will open again with a specific decrease in that condition.

E-8

Typical representation of a Sure-Seal connector. The plugand receptacle contain both pins and sockets.

T

3

22

1 2

1 2

1

Electrical Schematic Symbols And Definitions

A = Components in operator compartment.

C = Components on relay panel (inside right console).

AA

This indicates that the component has a wire connected to it that is connected to ground.

This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine.

SENDER - A component that is used with a temperature or pressure gauge. The sender measures the temperature or pressure. Its resistance changes to give an indication to the gauge of the temperature or pressure.

RELAY (Magnetic Switch) - A relay is an electrical component that is activated by electricity.

It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close the switch part of the relay.

CIRCUIT BREAKER (C/B) - A component in an electrical circuit that will open the circuit if too much current flows through it. This does not destroy the circuit breaker and it can be reset to become part of the circuit again.

SOLENOID - A solenoid is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work.

MAGNETIC LATCH SOLENOID - A magnetic latch solenoid is an electrical component that is activated by electricity and held latch by a permanent magnet. It has two coils (latch and unlatch) that make electromagnet when current flows through them. It also has an internal switch that places the latch coil circuit open at the time the coil latches.

6

5

3

4 B

AA

L30

TO PLATFORM

H K

552-WH

143-BR

143-BR

766-GN 143-BR

U

1 2

D

L18

L12

LAMP TEST SW 3E-7267

L19

L37

L32

DD

DD

200-BK

D

1 2

306-GN D

307-OR

THERMOSTAT SW 3E-5465

BK BK

E

L31

766-GN

8

101-RD-6

G

D

BK BK

L3

COOLANT SENDER 7N-8532 D ABBREV

T

CONVERTER SENDER 4W-9972

450-YL 441-OR 308-YL 309-GY

101-RD-6

E

1 2

BK BK

RD WH OR YL PK BK GY PU BR GN BU

450-YL 309-GY D

FRONT DRIVE SOLENOID 6T-9519

D

321-BR 200-BK

321-BR-16 2 200-BK-16 1 NN D

NN

2 5

5 8 7 6 2 1 4 3

101-RD-6

ALTERNATOR 55A 7T-2876

1 NN200-BK-16 3 4

200-BK

BACKUP ALARM SW 7N-8008

6

D

D+ D B+ W ALT C

D

D

E

D

C

405-GY 406-PU 310-PU

CIRCUIT NOT CONNECTED

450-YL 441-OR 308-YL 309-GY

INTERNAL ELECTRICAL CONNECTION TO SURFACE OF COMPONENT CONNECTOR

ELECTRICAL CONNECTION TO VEHICLE STRUCTURE

ATCH WIRE, CABLE, COMPONENT

L2 IDENT

L23

R 2 1

L1 L1

L18

WIRES THAT HAVE BATTERY VOLTAGE WHEN THE KEY SWITCH IS ON.

143-BR 536-WH-16 L21 L20

L21 L25

L25

BK BK

2 1

WIPER/WASHER CIRCUIT. HEATER AND AIR CONDITIONER CIRCUIT.

TURN SIGNAL CIRCUIT.

MONITOR CIRCUIT.

BUCKET POSITIONER SOLENOID 9T-7304

PANEL LAMP CIRCUIT.

GROUND CIRCUIT.

GAUGE CIRCUIT.

L18

L18

BUCKET POSITIONER SW 9G-2795

START AID CIRCUIT.

ALL DASHED LINES ARE ATTACHMENTS.

G

321-BR 322-GY 200-BK-16 128-PK 121-YL 447-PK

6 3 1 2 5 4

200-BK 762-YL

762-YL 128-PK

E

L40

G

L3

762-YL

KK

200-BK

KK

200-BK

G

610-OR-16 200-BK-16

447-PK

321-BR 121-YL

610-OR-16 200-BK-16 607-PK-16

7

2 1

1 2

6

5

4

PART NO.

CHG LOC B-9 A-8 C-4 B-7 A-6 B-7 B-8 E-3 D-4 E-3 B-4 D-3 D-3 E-3 F-9 F-7 F-7 A-1

C J U Z EE LL MM NN

WIRE AS. 7W-0810 9R-0895 9R-9867 9R-1176 1V-1151 9R-9993 9R-9502 9R-9117

04 03 01 02 01 00 00 00

C-1 D-7 C-4/C-5 F-5 E-7 D-6 C-7 C-2

AA AA BB BB CC

CABLE AS. 9R-9936 9R-9937 9R-9935 9R-9938 7P-6682

01 00 00 01 01

F-5 F-5 F-5 F-5 D-2

COMPONENTS ARE SHOWN INSTALLED ON A FULLY OPERABLE MACHINE WITH THE KEY AND ENGINE OFF, AND XMSN SHIFTER IN NEUTRAL UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 18 GAGE NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGE NOTE B: NORMALLY CLOSED WHEN BRAKE IS DEPRESSED NOTE C: FUSES 10A 9W-1442 15A 9W-1441 30A 8T-9636 NOTE D: WITH ATCH LOWER REAR WIPER, REPLACE 7T-9303 WITH 3E-5155

TURN LAMP 7T-3873

3

2

1

B

A B D E G H K L P Q R V W DD GG HH JJ KK

THIS SCHEMATIC IS FOR THE 416, 426, 428, 436 & 438 BACKHOE NACD (9X-8089 CHG 02)

HEAD LAMP 9X-0406

NOTE

HARNESS AS. 9R-9558 00 9R-9551 01 9R-9549 02 9R-9541 02 9R-9542 01 9R-9544 03 9R-9557 02 9R-9543 02 9R-9560 01 9R-9538 00 9R-9561 01 7T-3550 02 9R-9552 00 7T-3551 02 9R-7939 01 9R-9098 02 9R-9443 01 9R-9536 01

L3

L24 FUEL SENDER 3E-7128

G

L3

L24

DESCRIPTION

CIRCUIT CONNECTED

TO ENGINE

L2

WIRES THAT HAVE BATTERY VOLTAGE WHEN THE KEY SWITCH IS OFF.

L27

C

BLADE, SPADE, RING, OR SCREW TERMINAL

L32

521-YL 522-WH

L23

COLOR RED WHITE ORANGE YELLOW PINK BLACK GRAY PURPLE BROWN GREEN BLUE

SYMBOL

D

E

Q

308-YL 309-GY 441-OR 443-YL 306-GN 307-OR 121-YL 128-PK 143-BR 200-BK-16

L20 618-YL-16 617-BR-16 603-PK 608-GN-16

E

FORWARD HORN 7T-0635

G 322-GY 200-BK

521-YL 513-OR D

441-OR D

766-GN

STARTING CIRCUIT.

L40

610-OR-16 606-GY-16 200-BK-16

1 2

COOLANT SW T 8N-1693

200-BK-16

B

608-GN-16 603-PK 617-BR-16 618-YL-16 610-OR-16 604-0R 605-YL-16 606-GY-16

L4 311-WH

NEUTRAL/ START SW 8C-5492

D

R

521-YL 522-WH

L1

AIR CONDITIONER CLUTCH SOLENOID 8T-8812

H

L31

7 3 1 8 4 5 2 6

D

COOLANT SW 6T-2665 D 200-BK 406-PU 200-BK D T

L22

603-PK-16 617-BR 618-YL

ENGINE OIL SW 7W-1238

L5

L4 310-PU 311-WH

200-BK 200-BK 200-BK 766-GN

DD T

D

L5

OPERATOR STATION

1 2 RD BK

TRANSMISSION NEUTRALIZER SOLENOID 6T-9519

FAULT ALARM 7T-9157

TO PLATFORM

D

405-GY

L1

200-BK-16 552-WH

2 6 1 3 4 5

405-GY 406-PU 310-PU

304-WH-10

L34

L2

BK-00 BK-00

501-GN-16 118-GY-16 500-BR-16 502-OR-16

200-BK-16

113-OR 405-GY 406-PU 1 2 200-BK-12 200-BK-12 V

DD

FUSE DD 3K-8782 FUSE HOLDER 4K-5122

1 2 3 4 5 6 7 8 9 10 11 12

E

450-YL 310-PU 618-YL L37 617-BR 603-PK 608-GN 536-WH-16 552-WH

447-PK H

E 610-OR-16

H

L21

C B A

K

1 2 3 4 5 6 7 8 9 10 11 12

506-PU

K E

304-WH-10 101-RD-6

GN GY BR OR 1 3 4 2

515-GY-12 516-GN-12 517-BU-12 515-GY-12 1 2

OR-14 BK-14

DIODE 8C-5444

T

143-BR 766-GN 321-BR 306-GN 307-OR 443-YL

L21

L22

200-BK

ENGINE SHUTDOWN SOLENOID 7W-6249

D

TO ENGINE

443-YL

E

L22

308-YL 200-BK

BB

L26

113-OR 568-GN 405-GY

RD-00 RD-00

113-OR 406-PU 405-GY

521-YL-16 522-WH-16

406-PU L

L32

L34

101-RD-6 L4

E

B

9

L

L31 606-GY-16

101-RD-6

CC D

766-GN 143-BR

L20

L29

1 5 3 4 2 6 7 8 9 10 11 12

606-GY-16

A

E W

BK-00

TO FRAME

W

200-BK 200-BK 200-BK

L

L18

L20

L22

610-OR-16

CC

200-BK

L

552-WH

143-BR 143-BR

L29

L

L

E

FRONT WIPER 6T-6529

W

521-YL-16

U

A

405-GY-16 406-PU-16

113-OR

L16 143-BR 766-GN

FORWARD HORN SW 3T-2357

MOTOR

BK-6

L K

RIGHT TURN IND LAMP 8M-6176

1 2

506-PU

552-WH 200-BK-16

D

STARTER 7X-1361

MOTOR

L

552-WH

143-BR

B B K

564-GY 505-BU 504-YL 503-BR 500-BR 501-GN 502-OR 118-GY 118-GY

200-BK-16 L33

W KP

BLOWER 3E-7501

200-BK

143-BR 608-GN

H

419-YL 322-GY 538-BR-16 128-PK 536-WH-16 143-BR 605-YL-16 L24 606-GY-16 604-OR 521-YL L23 522-WH 113-OR 406-PU L19 405-GY

552-WH

L33 306-GN

200-BK-16

304-WH-10

H

101-RD-10 101-RD-10

H

COOLANT TEMP LAMP 8M-6176

L11

L38

K

H

200-BK-16 200-BK-16

L39

308-YL 101-RD-10

200-BK-16

112-PU-10

H

PANEL LAMP 8L-9801

P 2 1

AA

E

V

S

MTR BAT

T

V

L

P AWD LAMP 8L-9801 BASE 9D-8047

FRONT WIPER SW 7T-9303

1 H

BK-16

H E

MAIN RELAY 7X-1379 H

H 2

E

BRAKE SW NOTE B 6T-5925

D G

MOTOR H

RESISTOR 7T-3828

522-WH-16 200-BK-16

604-OR 143-BR

L27

P K L1 504-YL K P1 503-BR

121-YL 116-BR

308-YL

194-GN-10

308-YL 101-OR-10

H

605-YL

L42

503-BR-16 504-YL-16 505-BU-16 564-GY-16 119-PK-16 102-BU-16 500-BR-16 501-GN-16 502-OR-16 118-GY-16

200-BK 119-PK 576-PK 577-PU

119-PK-16

200-BK-16 552-WH

V

PARK BRAKE LAMP 8M-6176

1 E COM

304-WH-10

L

V

10A

608-GN 536-WH-16 538-BR-16

310-PU

L36

MM H

L33

L33

119-PK

FRONT DRIVE SW 3E-7270

128-PK 538-BR-16

608-GN-16

608-GN-16 200-BK-16

608-GN-16 200-BK-16

102-BU

WH-16 309-GY

603-PK

116-BR

121-YL

ST ON OFF

308-YL 308-YL 308-YL

614-PU-16

112-PU-10

K HH 200-BK MM START RELAY 30-2266

200-BK-16 K

N/O

3 E 2

E

124-GN-10

L

L29

102-BU-16 119-PK-16 504-YL 503-BR 505-BU 502-OR 501-GN 500-BR 118-GY 564-GY B

HH L 576-PK P HH B 119-PK K B1 564-GY K H1 505-BU

L29

102-BU-16 119-PK-16 504-YL-16 503-BR-16 505-BU-16 502-OR-16 501-GN-16 500-BR-16 118-GY-16 564-GY-16 L41

K

B

B

W HH H

N/C

6 H

143-BR

L15

200-BK-16 605-YL-16 604-OR 610-OR-16 617-BR 608-PK-16 608-GN-16 FLOOD LAMP 9X-6853

577-PU

K HH

TERMINAL BLOCK 8Y-5492

L40

606-GY-16 200-BK-16

2 1

H 5

RUNNING LAMP SW 3E-7268

L12

L27

B

TURN LAMP 7T-3873

3 H 4

TRANSMISSION NEUTRALIZER SW 9R-9868 U U

L21

L34 L40 L40

OPERATOR STATION L41

604-OR 618-YL 200-BK-16

3 2 1

1 H

H 2

102-BU

520-WH-12

ENGINE OIL PRESS LAMP 8M-6176

COM

N/C

REAR DUAL WIPER SW 3E-5155 NOTE D

308-YL

L20

S T

1

1 E

521-YL 522-WH

RED 2 DD BLK 5 V BLU 4 V GRN 3 V OR

L

N/O 3 E 2

L16

L E 521-YL 2 522-WH 1 DD Q BLOWER SW 6P-3236

1E

LEFT TURN IND LAMP 8M-6176

BRAKE SW NOTE B 6T-5925

605-YL-16 606-GY-16 536-WH-16 538-BR-16 322-GY 128-PK 113-OR 419-YL 406-PU 405-GY

L37

L41

A

2 H

L16

L30

5 H

H 4 H 3

536-WH

L

L38

K

STOP/ TAIL LAMP 7T-3872

1 H

L22

L29

A

614-PU

HAZARD SW 3E-7271

1 H

610-OR

6 L

538-BR

606-GY

L19

119-PK-16 119-PK-16

K

K RELAY 7X-1379

143-BR

L32

116-BR 113-OR 121-YL

L37

L39

200-BK-16 200-BK-16 200-BK-16 200-BK-16

200-BK-16 200-BK-16

308-YL

H

H 157-YL-16 TURN LAMPS 10A H 123-WH GAGES 10A H 128-PK BUCKETPOS/HORN 10A H XMSN NEUT/STOP LAMP/FRONT DRIVE 10A

10A 10A 10A H

REAR FLOOD H MONITOR LAMPS H BACKUP ALARM/BEACON

15A 10A 10A 10A 161-PK-16 105-BR 617-BR 618-YL

124-GN-10 119-PK-16 118-GY L39

L38

H

124-GN-10

B

REAR FLOOD LAMP SW 3E-7270

START AID SW 3E-7272 H 2

113-OR 610-OR 538-BR-16

200-BK-16

FLASHER 7T-4848

536-WH-16 537-GN-16 161-PK-16 157-YL-16

49 49A 31

101-RD-6 304-WH-10

L41

L41

H

L33

FUSE HOLDER 9W-2035 NOTE C

H

K

H

L39

K

101-RD-16

101-RD-10

101-RD-6 101-RD-10 101-RD-10

HAZARD LAMPS H KEY H LEFT TAIL LAMP H RIGHT TAIL LAMP

E

30A 15A 10A

200-BK-16

OPERATOR STATION

L34

101-RD-16

101-RD-16 H K 102-BU-16 15A 102-BU H RUNNING LAMP BREAKER 3T-2662

BACKUP ALARM 3E-6391 G 121-YL 321-BR G

H

TRANSMISSION NEUTRALIZER SW 9R-9868 U U 143-BR 766-GN 6

H 2

BEACON SW 3E-7270

634-WH

194-GN-10 112-PU-10

H

+ BATTERY OUT (LAMP) GROUND

R

1 H

H 2

614-PU-16

TERMINAL BLOCK 8Y-5492 H K

447-PK 443-YL 441-OR

L35

L36

BLOWER MOTOR K REAR WIPER K FRONT WIPER

450-YL

L35 200-BK-16 200-BK-16 200-BK-16 200-BK-16 200-BK-16

B S C K H H 105-BR 307-OR

614-PU

614-PU 614-PU 614-PU 614-PU

450-YL

C

H

GRD H

L35

441-OR

H

200-BK-16

H

308-YL

SEND

H GRD

614-PU 614-PU

H

GRD

START SW 9G-7641

IGN

H

RESISTOR DIODE 8C-4110 8C-5444 H J H

123-WH

123-WH

IGN

H

200-BK-16

IGN

H SEND

SERVICE METER 6T-7337

LAMP 8M-6176

H

614-PU

H

H

COOLANT TEMP GAGE 3E-8535

450-YL

200-BK-16

614-PU

H

123-WH

123-WH GRD H

H

D

H

SEND

LAMP 8M-6176

200-BK-16

H

LAMP 8M-6176 443-YL

450-YL

+

447-PK

123-WH

-

IGN

H

614-PU 200-BK-16

123-WH 200-BK-16 450-YL

SIG

H

H

-

H

LAMP 8M-6176

+

LAMP 8M-6176

VOLTMETER 3E-8533

LL H

L 5

L11

L30

L35

123-WH 123-WH 123-WH 123-WH 123-WH

CONV TEMP GAGE 3E-8534

538-BR

L26

L36

L

L 3 4 L

143-BR

200-BK-16 200-BK-16 200-BK-16 200-BK-16 200-BK-16

606-GY

1

L 2

L11

604-OR 143-BR

L42

7 8 1 2 3 4 5 6 12 11 10 9

605-YL 606-GY 536-WH 538-BR L11

520-WH-12

L28

L28

LL H

FUEL GAGE 3E-8532

605-YL

L28

118-GY

503-BR-16 505-BU-16 504-YL-16

443-YL 441-OR 447-PK

TACHOMETER 3E-7391

102-BU-16

564-GY-16

610-OR 614-PU

GN GY BR OR

TURN SIGNAL SW 3E-7268

605-YL

614-PU

H MOTOR T

200-BK-16 200-BK-16 200-BK-16 200-BK-16 TO PLATFORM 200-BK-16 A A 1 504-YL-16 3 564-GY-16 4 503-BR-16 2 505-BU-16

L

WIPER DISCONNECT SW 6T-5925

L30

REAR UPPER WIPER MOTOR 6T-6529

119-PK-16

119-PK-16

N/O

537-GN-16 536-WH-16 161-PK-16 157-YL-16

L41

L41

N/C 119-PK-16

2 3

L41

E

L41

COM 1 564-GY-16

OPERATOR STATION

603-PK-16 617-BR 604-OR 605-YL-16 608-GN-16 610-OR-16 200-BK-16

200-BK-16

L42

538-BR

200-BK-16 102-BU-16

L12

L11

EE

A

L26 L12

405-GY

BK-14

A RADIO

L26

113-OR 419-YL 406-PU

EE

FAN AS. 5D-2855

119-PK-16

L5

DOME LAMP 4M-3601

A

113-OR

OR-14 RD-14

A

102-BU-16 200-BK-16

200-BK-16 200-BK-16

536-WH 538-BR

H

MOTOR

A

521-YL 513-OR

506-PU OPERATOR STATION

200-BK

L

BEACON FIXED 9R-8250 B MAGNETIC 9X-8079 603-PK-16

Z

RD-00 BK-00 RD-00

BB TO FRAME

200-BK-16

200-BK-16 200-BK-16

REAR LOWER WIPER MOTOR 9X-4530

Z

BK-6

200-BK 606-GY 406-PU

576-PK 577-PU A512-GN

200-BK-16 200-BK-16

322-GY 128-PK

W/ATCH HARNESS GG CONNECT HARNESS C AND BEACON 9R-8250 AS SHOWN

200-BK 577-PU 576-PK 119-PK

419-YL WW

REFRIGERANT SW NOTE A 9D-6888 R R

200-BK

GND H MOTOR

119-PK

E

200-BK-16

JJ HH 4 3 2 1

200-BK

INTERMITTENT ADJ INTERMITTENT LOW HIGH GROUND

N/O

605-YL 606-GY

L

N/C 200-BK

2 3

L4

F

POS NEG BATTERY

L25

GG 603-PK-16

B+

603-PK-16

BEACON 9R-8250

JJ

310-PU 311-WH

HEAD LAMP 9X-0406

B

200-BK-16 200-BK-16

B

1 2

B

200-BK-16

3T-5760

102-BU-16

GG

BB

START AID SOLENOID 3T-9493 D

RD-00 RD-00 BK-00

E

OPERATOR STATION

603-PK-16 200-BK-16

WIPER DISCONNECT SW COM 1 6T-5925

AA

PARK BRAKE SW 6T-5925

OPERATOR STATION

B GG

L7

1

BK-18 BK-18

610-OR-16

L7

605-YL-16 610-OR-16 200-BK-16

604-OR 617-BR 200-BK-16

BATTERY 3T-5760

604-OR

3 2 1

B

766-GN 143-BR

STOP/ TAIL LAMP 7T-3872

BB

POS NEG

605-YL-16 200-BK-16

BK-00

2 1

BK-00

TURN LAMP 7T-3873

TURN LAMP 7T-3873

2 1

605-YL-16 200-BK-16 610-OR-16

200-BK-16

BK-00

605-YL-16

F

B

L7

L7 608-GN-16 200-BK-16

RD-00

B

FLOOD LAMP 9X-6853

2

200-BK

7

8

9

STD ATCH STD ATCH

A

SENR3401 April 1986

426 Backhoe Loader Hydraulic System 7BC1-UP

© 1986 Caterpillar All Rights Reserved

SENR3401 8 Page,UHE

Printed in U.S.A.

SENR3401 8 Page, UHE

Wire Number

Wire Description

Wire Color

Description

Wire Number

Wire Color

Power Circuits

Description

RD

Bat (+)

500

BR

Wiper - Front (Park)

102

BU

Hd Lmp

501

GN

Wiper - Front (Low)

105

BR

Key Sw

502

OR

Wiper - Front (HI)

112

PU

Main Power Relay Output

503

BR

Wiper - Rear (Park)

113

OR

Opr Mon Panel B (+) Switched

504

YL

Wiper - Rear (Low)

116

BR

Aux Ckt

505

BU

Wiper - Rear (HI)

118

GY

Aux Ckt

506

PU

Washer - Front

119

PK

Aux Ckt

513

OR

A/C Compressor/Refrigerant Pressure SW

121

YL

Backup Alarm Lamp

515

GY

Blower Motor (HI)

123

WH

Aux Ckt

516

GN

Blower Motor (Medium)

124

GN

A/C

517

BU

Blower Motor (Low)

128

PK

Aux Ckt

520

WH

Opr A/C SW To Thermostat/Fuse

143

BR

Aux Ckt

521

YL

A/C SW To Refrigerant SW

157

YL

Aux Ckt

522

WH

A/C Clutch To Thermostat SW

161

PK

Aux Ckt

536

WH

Hazard SW To Turn SW

194

GN

Aux Ckt

537

GN

Turn Signal SW To Flasher

538

BR

Hazard Indicator

552

WH

Four Wheel Drive Sol

Ground Circuits

Connectors

Machine Location

B-9

5 Contacts

*

E - 9R9541 H - 9R9544

12 Contacts

E - 9R9541

3

L - 9R9543 E - 9R9541

3

E - 9R9541 D - 9R9549

7

E - 9R9541 B - 9R9550

6

6 Contacts

GG - 9R9535 D - 9R9549

9

E-3

*

GG-9R9535

A-2, F-3

Head/Position Turn Lamp A - 9R9558

D-3

Front Wiper Motor A - 9R9558

E-9

Rear Wiper Motor (Upper) B - 9R9550

11

A-9

NN - 9R9567

A-8

12

B-4

13

E-2

14

B - 9R9550

A-9

C - 9R9537 TT - 9R9098

F-7

UU - 9R9443 B - 9R9550

F-9

NN - 9R9567

C-4

E - 9R9541 E - 9R9541

8

*

A-6

G - 9R9542

* = Connector is located at the component.

Main Chassis Basic Machine Circuits

564

GY

Rear Wiper Interrupt SW To Wiper SW

304

WH

Starter Relay No. 1 Output

568

GN

Waring Buzzer To Diodes

306

GN

Starter Relay Coil To Neut Start SW Or Key SW

576

PK

Wiper - Aux (Lo)

307

OR

Key Sw To Nuet Start SW

577

PU

Wiper - Aux (Hi)

308

YL

Main Power Relay Coil

A512

GN

Rear Interrupt SW To Wiper Motor

309

GY

Alternator Regulator Term.

310

PU

Start Aid SW To Start Aid Sol

603

PK

Rotary Beacon

311

WH

Start Aid Sol To Temp SW

604

OR

Stop Turn lamp

321

BR

Bckp Alarm

605

YL

Turn Lamp - Left

Lighting Circuits

Warning Horn (Forward)

606

Monitoring Circuits

607

GY PK

SENR5818 December 1992

Schematic Location

Harness and/Or Components

4 Contacts

B - 9R9550

8 Contacts

B-7

B-7

H - 9R9544

5

BK

GY

Schematic Location

K - 9R9557

2

200

322

Harness and/Or Components A - 9R9558

1

Accessory Circuits

101

HARNESS CONNECTOR LOCATION CHART

Machine Location

Connectors

Part No.

Turn Lamp - Right

8N1693

Flood Lamp - Front

405

GY

Opr Mon Oil Press. (Low Setting)

608

GN

Flood Lamp - Rear

406

PU

Opr Mon Coolant Temp

610

OR

Head Lamp Basic

419

YL

Opr Mon Parking Brake

611

PU

Head Lamp Hi

441

OR

Eng Coolant Temp Gauge

614

PU

Park/Tail/Dash Lamp

443

YL

Power Train Temp Gauge

617

BR

Tail/Position Lamp - Left (Road Pkg)/Width

447

PK

Fuel Level Gauge

618

YL

Tail/Position Lamp - Right (Road Pkg)/Width

450

YL

Tach Sender

619

GN

Head Lamp Lo

634

WH

Head lamp SW To Work/Head Lamp Jumper

762

YL

Bucket Positioner Sol SW

766

GN

XMSN Disconnect Sol

Off Machine Switch Specification

Function

Actuate

Deactuate

Contact Position

37.8 ± 2.8°C

26.7°C MIN

Normally

(100 ± 5°F)

(80°F MIN)

Closed

107.2 ± 2.8°C

93°C MIN

Normally

(225 ± 5°F)

(196°F MIN)

Closed

Coolant Temperature (Start Aid)

6T2665

Coolant Temperature

416, 426, 428, 436, And 438 Series II Backhoe Loaders With European Cab Electrical System 416: 5PC15429-UP

428: 6TC10381-UP

426: 7BC5259-UP

436: 5KF1553-UP

438: 3DJ2161-UP

Control Circuits

Resistor, Sender and Solenoid Specifications

Component Description

Part No.

Resistance (Ohms)¹

Resistor - Alternator

8C4110

22 ± 1.1

Resistor - Blower Motor Speed

7T3828

Overall 1.0 ± .1; Tap0.5 ± .05

Solenoid - A/C Clutch

8T8812

3.5 ± 0.15

Solenoid - Bucket Positioner

9T7304

18.0

Solenoid - Start Aid

3T9493

1.5

¹ At room temperature unless otherwise noted.

Printed in U.S.A.

© 1992 Caterpillar All Rights Reserved

Harness And Wire Electrical Schematic Symbols Component Location

Machine Location

Component

Schematic Location

Machine Location

Component

Schematic Location

1

Alarm - Backup

B-9

15

Solenoid - Front Drive

C-2

A

Alarm - Fault

C-3

16

Solenoid - Start Aid

F-2

2

Alternator

C-1

17

Solenoid - Transmission Neutralizer

C-2

3

Batteries

F-S

18

Switch - Backup Alarm

C-2

C

Breaker - Running Lamp

C-8

B

Switch - Beacon

D-7

C-9

A

Switch - Blower (Heater And Air Cond)

E-3

C-B, C-3

19

Switch - Bucket Positioner

A-1

20

Switch - Coolant Temperature

C-2

A

Flasher

C

Fuse - Holders

B

Gauge - Converter Temperature

D-8

B

Gauge - Coolant Temperature

D-8

B

Gauge - Fuel

D-9

21

Switch - Coolant Temperature (Start Aid)

Gauge - Tachometer

D-9

A

Switch - Dimmer

E-4

4

Horn - Forward

D-1

22

Switch - Engine Oil Pressure

D-1

B

Meter - Service

D-9

A

Switch - Forward Horn

C-4

Meter - Volt

D-8

B

Switch - Front Drive

Motor - Blower

D-3

B

Switch - Front Wiper

C-6

A

Motor - Fan

E-7

B

Switch - Hazard

D-7

A

Motor - Front Wiper

D-3

B

Switch - Head Lamp/Front Flood

D-7

A

Motor - Rear Wiper (Lower)

F-8

B

Switch - Key Start

D-8

A

Motor - Rear Wiper (Upper)

E-9

A

Switch - Lamp Test

C-4

S

Motor - Starter

E-2

23

Switch - Neutral/Start

C-2

6

Motor - Windshield Washer

F-4

24

Switch - Parking Brake

F-6

C

Relay

C-8

B

Switch - Rear Dual Wiper

D-6

C

Relay - Main

C-7

B

Switch - Rear Flood Lamp

D-7

C

Relay - Start

C-7

26

Switch - Refrigerant

F-1

7

Resistor - Alternator Field

D-7

B

Switch - Running Lamp

D-6

A

Resistor - Blower Motor Speed

D-3

B

Switch - Start Aid

D-7

8

Sender - Converter

C-2

A

Switch - Thermostat

C-3

9

Sender - Coolant Temperature

C-1

A

Switch - Turn Signal

E-4

10

Sender - Fuel

A-6

27

Switches - Brake (Stop Light)

D-4

12

Solenoid - Air Conditioner Clutch

D-1

13

Solenoid - Bucket Positioner

A-4

14

Solenoid - Engine Shutdown

D-2

A = Components in operator compartment.

A A

Switches - Transmission Neutralizer Switches - Wiper Disconnect

D-6, D-4 E-8

Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.

2 T

Pressure Symbol

3

14

12

1

B 1

C

2

5

16

5

14

22

4

12

15

8

18 27 17

11

2

23

20

C

Normally open switch that will close with an increase of a specific condition (temp-press-etc.).

A

A 325-PK-14

9 21

19

7

Pin or Socket Number

Flow Symbol

26

Pin

Normally open switch that is closed due to an applied condition, and will open again with a specific decrease in that condition.

13 10

AA 1

Normally closed switch that will open with an increase of a specific condition.

19

C 1

2

1

14 11

7

3

24

12 7

18

9 8

13

12

6

16

17 27 8

10 3

5

23 15

14

REED SWITCH - A switch whose contacts are controlled by a magnet. A magnet closes the contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.

21 20

22

Wire Gauge

FUSE - A component in an electrical circuit that will open the circuit if too much current flows through it.

4

5

200-BK-14

Electrical Schematic Symbols And Definitions

The circle indicates that the component has screw terminals and a wire can be disconnected from it.

13

325-PK-14

Circuit Number Identification

Normally closed switch that is open due to an applied condition, and will close again with a specific decrease in that condition.

A

9X-1123

Wire Color

Socket

2

B

Component Part Number

Single Wire Connector

6

A

8

Typical representation of a Sure-Seal connector. The plugand receptacle contain both pins and sockets.

Wire, Cable, or Harness Assembly Identification

13

9

7

Level Symbol

6

3

24

Temperature Symbol

1 2

1 2

Receptacle

Plug

C-6

A

AA 1

Electrical Schematic Symbols And Definitions

C-1

B

B

A

No circle indicates that the wire cannot be disconnected from the component.

9 7 26

T

SENDER - A component that is used with a temperature or pressure gauge. The sender measures the temperature or pressure. Its resistance changes to give an indication to the gauge of the temperature or pressure.

6

This indicates that the component has a wire connected to it that is connected to ground.

B = Components in operator compartment - Right console.

C = Components on relay panel (inside right console).

Machine Harness Connector and Component Locations

This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine.

RELAY (Magnetic Switch) - A relay is an electrical component that is activated by electricity.

It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close the switch part of the relay.

CIRCUIT BREAKER (C/B) - A component in an electrical circuit that will open the circuit if too much current flows through it. This does not destroy the circuit breaker and it can be reset to become part of the circuit again.

SOLENOID - A solenoid is an electrical component that is activated by electricity. It has a coil that makes an electromagnet when current flows through it. The electromagnet can open or close a valve or move a piece of metal that can do work.

MAGNETIC LATCH SOLENOID - A magnetic latch solenoid is an electrical component that is activated by electricity and held latch by a permanent magnet. It has two coils (latch and unlatch) that make electromagnet when current flows through them. It also has an internal switch that places the latch coil circuit open at the time the coil latches.

3

4 607-PK-16 200-BK-16

C

START AID SOLENOID 3T-9493

BK-00 BB BK-00

K

L18 552-WH

L20 L21

L22

L22

L9

611-PU-16 619-GN-16 618-YL-16 200-BK-16 606-GY-16

L12

L7 CC D

101-RD-6

L2

L4

308-YL 200-BK

BB 200-BK

L26

521-YL-16 DD

DD

200-BK 766-GN

D

1 2

306-GN 307-OR

THERMOSTAT SW 3E-5465

766-GN 143-BR

L7

D

BK BK

143-BR 766-GN 321-BR 306-GN 307-OR 443-YL

2 6 1 3 4 5

766-GN

T

766-GN

405-GY 406-PU 310-PU 450-YL 441-OR 308-YL 309-GY

E

1 2

L21

L20 618-YL-16 617-BR-16 603-PK 608-GN-16

E

2 321-BR-16 2 1 D VV WW 5 419-YL

321-BR 200-BK

L23

BK BK

6

XX

101-RD-6

E

521-YL 522-WH

200-BK

322-GY 200-BK 200-BK

ELECTRICAL CONNECTION TO VEHICLE STRUCTURE INTERNAL ELECTRICAL CONNECTION TO SURFACE OF COMPONENT CONNECTOR

S

D

S

ATCH WIRE, CABLE, COMPONENT IDENT

405-GY 406-PU 310-PU

L2

D

L1 L1

PANEL LAMP CIRCUIT WIPER/WASHER CIRCUIT HEATER AND AIR CONDITIONER CIRCUIT

L25

L25

GROUND CIRCUIT

BK BK

2 1

TURN SIGNAL CIRCUIT

MONITOR CIRCUIT

BUCKET POSITIONER SW 9G-2795

START AID CIRCUIT

ALL DASHED LINES ARE ATTACHMENTS.

G

321-BR 322-GY 200-BK-16 128-PK 121-YL 447-PK

6 3 1 2 5 4

200-BK 762-YL

762-YL 128-PK

FUEL SENDER 3E-7128

G

L3

KK

200-BK

KK

CHG LOC

NOTE

A B C D E F G H K L P Q R V W W DD GG KK NN NN QQ SS TT UU

B-8 A-8 A-9 C-4 B-7 B-8 A-6 B-7 B-8 E-3 D-4 E-3 B-4 D-3 D-3 STD D-3 ATCH E-3 E-2 A-1 A-9/F-9 E A-9/F-9 D F-4 F-9 F-7 F-7

J S U Z EE MM LL VV WW XX

WIRE AS. 9R-0895 7W-0810 9R-9867 9R-1176 1V-1151 9R-9502 9R-9993 9R-9117 9R-5907 9R-9121

03 04 01 02 01 00 00 00 02 00

D-7 C-1 C-4/C-5 F-5 E-7 C-7 E-7 C-2 C-2 C-2

AA AA BB BB CC

CABLE AS. 9R-9936 9R-9937 9R-9935 9R-9938 7P-6682

01 00 00 01 01

F-5 F-5 F-5 F-5 D-2

G

447-PK

L7

321-BR 121-YL

607-PK-16 200-BK-16

L15

6

5

4

C C

FRONT FLOOD LAMP 9W-1001

3

619-GN-16 200-BK-16 611-PU-16 618-YL-16 606-GY-16

2 5 1 3 4 GG

GN-16 BK-16 PU-16 YL-16 GY-16

HEAD/POSITION TURN LAMP 7T-7104

2

A

UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 18 GAGE NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGE NOTE B: NORMALLY CLOSED WHEN BRAKE IS DEPRESSED NOTE C: WITH ATCH FRONT FLOOD LAMPS, DISCONNECT WIRE AS. LL AND CONNECT 634-WH TO TERMINAL 2 AND 610-OR TO TERMINAL 3 OF THE HEAD LAMP/FRONT FLOOD LAMP SW NOTE D: FOR THE 416, 426 AND 436 ONLY NOTE E: FOR THE 428 AND 438 ONLY NOTE F: 10A 9W-1442 15A 9W-1441 30A 8T-9636 NOTE G: WITH ATCH LOWER REAR WIPER, REPLACE 7T-9303 WITH 3E-5155

1

B

STD ATCH STD ATCH

COMPONENTS ARE SHOWN INSTALLED ON A FULLY OPERABLE MACHINE WITH THE KEY AND ENGINE OFF, AND XMSN SHIFTER IN NEUTRAL

L17

7

762-YL

PART NO.

HARNESS AS. 9R-9558 00 9R-9550 03 9R-9537 01 9R-9549 02 9R-9541 02 9R-9992 00 9R-9542 01 9R-9544 03 9R-9557 02 9R-9543 02 9R-9560 01 9R-9538 00 9R-9561 01 7T-3550 02 9R-9552 00 9R-9566 00 7T-3551 02 9R-9535 01 9R-9536 01 9R-9568 00 9R-9567 01 9R-1066 04 9R-7939 01 9R-9098 02 9R-9443 01

THIS SCHEMATIC IS FOR THE 416, 426, 428, 436 & 438 BACKHOE COSA (9X-8088 CHG 02)

200-BK

L17 L40

G

2 1

L3

L3

C

CIRCUIT NOT CONNECTED

D+ D B+ W ALT

TO ENGINE

GN-16

R 2 1

DESCRIPTION

CIRCUIT CONNECTED

L2

BUCKET POSITIONER SOLENOID 9T-7304

L21 L20

L21

L15

8

D

ALTERNATOR 55A 7T-2876

D

COLOR RED WHITE ORANGE YELLOW PINK BLACK GRAY PURPLE BROWN GREEN BLUE

SYMBOL

450-YL 309-GY D

L24

607-PK-16 200-BK-16

D

D

E

GAUGE CIRCUIT

143-BR 536-WH-16

RD WH OR YL PK BK GY PU BR GN BU

COOLANT SENDER 7N-8532

450-YL 441-OR 308-YL 309-GY

L18

L27

ABBREV

BLADE, SPADE, RING, OR SCREW TERMINAL

3 4 W 568-GN

200-BK-16

5 8 7 6 2 1 4 3

WIRES THAT HAVE BATTERY VOLTAGE WHEN THE KEY SWITCH IS ON.

E

506-PU 610-OR-16 606-GY-16 618-YL-16 605-YL-16 617-BR-16

BK BK

T

1 VV200-BK-16

VV

D

WIRES THAT HAVE BATTERY VOLTAGE WHEN THE KEY SWITCH IS OFF.

L18

FORWARD HORN 7T-0635

G

H

L24 E

D

COOLANT SW T 8N-1693

FRONT DRIVE SOLENOID 6T-9519

BACKUP ALARM SW 7N-8008

STARTING CIRCUIT

L40

B

L31

D

CONVERTER SENDER 4W-9972

200-BK-16 552-WH

L31 603-PK-16

608-GN-16 603-PK 617-BR-16 618-YL-16

1 2

441-OR D

AIR CONDITIONER CLUTCH SOLENOID 8T-8812

R

521-YL 522-WH

L1

311-WH

NEUTRAL/ START SW 8C-5492

D

G

L5

COOLANT SW 6T-2665 D 200-BK 406-PU 200-BK D T

L22

7 3 1 8 4 5 2 6

D

E

101-RD-6

L23

L22 607-PK-16 608-GN-16 603-PK-16

ENGINE OIL SW 7W-1238

L5

FAULT ALARM 7T-9157

TO PLATFORM

D

L4 310-PU 311-WH

200-BK

1 2 RD BK

200-BK-12

TRANSMISSION NEUTRALIZER SOLENOID 6T-9519

DD T

L1

200-BK

W

V

D

405-GY

OPERATOR STATION

113-OR 568-GN

568-GN

ENGINE SHUTDOWN SOLENOID 7W-6249

D

TO ENGINE

200-BK

1 2 200-BK-12

304-WH-10 101-RD-6

GN GY BR OR 501-GN-16 118-GY-16 500-BR-16 502-OR-16

113-OR 405-GY 406-PU

515-GY-12 1 2 OR-14 BK-14

E W

101-RD-6

L32

L34

BK-00

TO FRAME

1 3 4 2

515-GY-12 516-GN-12 517-BU-12

CC

A

DD

FUSE DD 3K-8782 FUSE HOLDER 4K-5122

L18

E

L31

200-BK-16 617-BR-16 604-OR 605-YL-16 200-BK-16 603-PK-16 608-GN-16 607-PK-16

FRONT WIPER 6T-6529

443-YL

Q

128-PK 538-BR-16

610-OR-16 604-OR 605-YL-16 606-GY-16

A

405-GY-16 406-PU-16

405-GY

113-OR 419-YL 406-PU

405-GY LAMP TEST SW 3E-7267

304-WH-10

308-YL 309-GY 441-OR 443-YL 306-GN 307-OR 121-YL 128-PK 143-BR 200-BK-16

H

E

450-YL 310-PU 618-YL L37 617-BR 603-PK 608-GN 536-WH-16 552-WH

447-PK H

610-OR-16

1 5 3 4 2 6 7 8 9 10 11 12

C B A

F B

1 2 3 4 5 6 7 8 9 10 11 12

607-PK-16

K B

113-OR 610-OR 538-BR-16

K E

B

STARTER 7X-1361

200-BK-16

521-YL-16 522-WH-16

200-BK 200-BK 606-GY 406-PU L

L

E

L20

200-BK-16

L8

L18

406-PU

520-WH-12

322-GY 128-PK D

L

D

MOTOR

T

200-BK

L

L32

L15

C

113-OR 406-PU 405-GY

538-BR

605-YL

143-BR

113-OR

113-OR

766-GN 143-BR

552-WH

U

1 2

552-WH

143-BR 143-BR

766-GN 143-BR

L19 L32 506-PU

124-GN-10

102-BU-16 119-PK-16 504-YL 503-BR 505-BU 502-OR 501-GN 500-BR 118-GY 564-GY

L11

605-YL

L

L

E

AA

MOTOR H

W

200-BK 200-BK 200-BK

S

MTR BAT

DIODE 8C-5444

522-WH-16 200-BK-16

L16 U

FORWARD HORN SW 3T-2357

D G

E

200-BK-16 200-BK-16

200-BK

143-BR

143-BR

RIGHT TURN IND LAMP 8M-6176

304-WH-10

MOTOR

10A

H

BLOWER 3E-7501

L

552-WH 200-BK-16

200-BK

L K

118-GY

506-PU

B B K

564-GY 505-BU 504-YL 503-BR 500-BR 501-GN 502-OR 118-GY 118-GY

200-BK-16 L33

143-BR

W KP

L29

H

COOLANT TEMP LAMP 8M-6176

L8

614-PU

306-GN

200-BK-16

304-WH-10

H

101-RD-10 101-RD-10

H

P

L7

RESISTOR 7T-3828

L

2 1

610-OR-16 605-YL-16 606-GY-16 617-BR-16 618-YL-16 506-PU

552-WH

K

H

200-BK-16 200-BK-16

L39

H

PANEL LAMP 8L-9801

E

BRAKE SW NOTE B 6T-5925

E

V

V

L5

L8

L

V

PARK BRAKE LAMP 8M-6176

1 E COM

521-YL 513-OR

124-GN-10

V

L11

L38 H

308-YL 101-RD-10

200-BK-16

112-PU-10

FRONT DRIVE SW 3E-7270

L33

H

3 E 2

520-WH-12

610-OR-16 619-GN-16 611-PU-16

L9

521-YL 522-WH

L

P AWD LAMP 8L-9801 BASE 9D-8047

FRONT WIPER SW 7T-9303

1 H

BK-16

101-OR-10

MM H

E

MAIN RELAY 7X-1379 H

H 2

121-YL 116-BR

K TT 200-BK MM START RELAY 30-2266

200-BK-16 K

N/O

605-YL-16 606-GY-16 536-WH-16 538-BR-16 322-GY 128-PK 113-OR 419-YL 406-PU 405-GY

GG B 1 2 3 6 5 4

L9

604-OR 143-BR

L42

7 8 1 2 3 4 5 6 12 11 10 9

L E 521-YL 2 522-WH 1 DD Q BLOWER SW 6P-3236

200-BK

P K L1 504-YL K P1 503-BR

143-BR

L42

200-BK-16 200-BK-16 604-OR 143-BR

L27

200-BK-16 552-WH

536-WH 538-BR

605-YL 606-GY

610-OR-16 619-GN-16 611-PU-16

503-BR-16 504-YL-16 505-BU-16 564-GY-16 119-PK-16 102-BU-16 500-BR-16 501-GN-16 502-OR-16 118-GY-16

200-BK 119-PK 576-PK 577-PU

102-BU

610-OR 614-PU

119-PK-16

536-WH-16 538-BR-16

W TT H

L12

TERMINAL BLOCK 8Y-5492

308-YL

308-YL K

L33

L33

TRANSMISSION NEUTRALIZER SW 9R-9868 U U

TT L 576-PK P TT B 119-PK K B1 564-GY K H1 505-BU

119-PK

L6

BK-00

L15 L15 L28 L30 309-GY

603-PK

121-YL

308-YL 308-YL 308-YL

105-BR 307-OR

L36 K

K RELAY 7X-1379

143-BR

L32

194-GN-10

112-PU-10

H 157-YL-16 TURN LAMPS 10A H 123-WH GAGES 10A H 128-PK BUCKETPOS/HORN 10A H XMSN NEUT/STOP LAMP/FRONT DRIVE 10A

10A 10A 10A 116-BR 113-OR 121-YL L33

L37 101-RD-6 304-WH-10

200-BK-16

TT

L8

RED 2 DD BLK 5 V BLU 4 V GRN 3 V OR

ENGINE OIL PRESS LAMP 8M-6176

COM

N/C

N/C

6 H

L29

605-YL-16

9

577-PU

1 E

REFRIGERANT SW NOTE A 9D-6888 R R L8

L6

DOME LAMP 4M-3601

A

1E

L

L29

606-GY-16

200-BK-16

H 5

RUNNING LAMP SW 3E-7268

536-WH

LEFT TURN IND LAMP 8M-6176

BRAKE SW NOTE B 6T-5925

N/O 3 E 2

L16

L29

L41

606-GY-16

608-GN-16 200-BK-16

3 H 4

K

L34

102-BU-16 119-PK-16 504-YL-16 503-BR-16 505-BU-16 502-OR-16 501-GN-16 500-BR-16 118-GY-16 564-GY-16 L41

604-OR 618-YL-16 606-GY-16 200-BK-16

1 H

H 2

308-YL

L27

L41

618-YL-16 617-BR-16 618-YL-16 618-YL-16

618-YL-16

1

102-BU

6 L

L

HIGH BEAM GG IND LAMP 8M-6176

REAR DUAL WIPER SW 3E-5155 NOTE G

L 3 4 L

L11

L11

L21

L34 L40 L40

A

1 H

2 H

A

605-YL 606-GY 536-WH 538-BR L11

611-PU-16 GG

L16

L

538-BR

606-GY

GG

L30

5 H

H 4 H 3

3 1 GG

DIMMER SW 4D-1836

L38

L29

1 2 3 4

C

308-YL

L20

LICENSE B LAMP 618-YL-16 (LOWER)

614-PU

HAZARD SW 3E-7271

1

L40

LICENSE C LAMP 618-YL-16 (UPPER)

C

REAR FLOOD LAMP SW 3E-7270

L22

L38

K

1 2 3 4 NN B

6

START AID SW 3E-7272 H

TRANSMISSION NEUTRALIZER SW 9R-9868 U U 143-BR 766-GN

610-OR

2

L19

119-PK-16

L15

F

LL H

HEAD/POSITION TURN LAMP 7T-7103

L6

L37

200-BK-16 200-BK-16 200-BK-16 200-BK-16

200-BK-16 200-BK-16

119-PK-16

REAR FLOOD LAMP 9X-6853

BEACON SW 3E-7270

H

H

L39

536-WH-16 537-GN-16 161-PK-16 157-YL-16

FLASHER 7T-4848

H

REAR FLOOD H MONITOR LAMPS H BACKUP ALARM/BEACON

H

161-PK-16 105-BR 617-BR 618-YL

124-GN-10 119-PK-16 118-GY L39

49 49A 31

+ BATTERY OUT (LAMP) GROUND

OPERATOR STATION

3 1

H 2

H 2

L37

L41

L41

H

15A 10A 10A 10A

FUSE HOLDER 9W-2035 NOTE F

H

HAZARD LAMPS H KEY H LEFT TAIL LAMP H RIGHT TAIL LAMP

L39

H

K 30A 15A 10A

101-RD-16

101-RD-10

101-RD-6 101-RD-10 101-RD-10

K

200-BK-16

L34 OPERATOR STATION

101-RD-16

E H

A

2

606-GY

1

L 5

L

634-WH

194-GN-10 112-PU-10

101-RD-16 H K 102-BU-16 15A 102-BU H RUNNING LAMP BREAKER 3T-2662

BACKUP ALARM 3E-6391 G 121-YL 321-BR G

R

1 H

H 2

614-PU-16

TERMINAL BLOCK 8Y-5492 H K

447-PK 443-YL 441-OR

L35

L36

BLOWER MOTOR K REAR WIPER K FRONT WIPER

450-YL

L35 200-BK-16 200-BK-16 200-BK-16 200-BK-16 200-BK-16

B S C K H H

614-PU-16

614-PU 614-PU 614-PU

ST ON OFF

614-PU 614-PU

H

GRD H 200-BK-16

H

308-YL

SEND

H GRD

H

IGN

H

H

GRD

START SW 9G-7641

L35

IGN

H

614-PU

450-YL

YL OR GY BK-16

LL H

RESISTOR DIODE 8C-4110 8C-5444 H J H

123-WH

123-WH

123-WH

IGN

H SEND

SERVICE METER 6T-7337

H

441-OR

H

LAMP 8M-6176

614-PU

H

H

COOLANT TEMP GAGE 3E-8535

450-YL

200-BK-16

614-PU

LAMP 8M-6176

200-BK-16

GRD H

LAMP 8M-6176

614-PU

H

SEND

VOLTMETER 3E-8533

443-YL

450-YL

H

CONV TEMP GAGE 3E-8534

HAZARD IND LAMP 8M-6176

L26 GG

L35

TURN SIGNAL SW 3E-7268 L 2

L4

RD-00 BK-00

L42

605-YL

310-PU 311-WH D

F

QQ

L12

L9

1 2

BK-18 BK-18

GY-16 YL-16 PU-16 BK-16 GN-16

TO FRAME

102-BU-16 200-BK-16

L9

L36 L30

GG 4 3 1 5 2

L26

L28 200-BK-16 200-BK-16 200-BK-16 200-BK-16 200-BK-16

200-BK-16

123-WH

447-PK

123-WH

IGN

H

614-PU 200-BK-16

123-WH 200-BK-16 450-YL

H

-

+

LAMP 8M-6176

+

SIG

FUEL GAGE 3E-8532

WASHER 9R-3468

BB TO FRAME

L14

102-BU-16

L28

537-GN-16 536-WH-16 161-PK-16 157-YL-16

GN GY BR OR

L12

564-GY-16 503-BR-16 505-BU-16 504-YL-16

QQ 200-BK-16

L8

L26

WIPER DISCONNECT SW 6T-5925

443-YL 441-OR 447-PK

H

STOP/TURN/ TAIL LAMP 92-2992

200-BK-16 102-BU-16

119-PK-16

119-PK-16

WH-16

T

LAMP 8M-6176

B

A

MOTOR

506-PU OPERATOR STATION

143-BR 607-PK-14 608-GN

H MOTOR

564-GY-16

TO PLATFORM 200-BK-16 A A 1 504-YL-16 3 564-GY-16 4 503-BR-16 2 505-BU-16

L

TACHOMETER 3E-7391

H

C

RADIO

N/O

HEAD LAMP/ FRONT FLOOD LAMP SW 3E-7269 NOTE C

-

A

N/C 119-PK-16

2 3

123-WH 123-WH 123-WH 123-WH 123-WH

D

FAN AS. 5D-2855

119-PK-16

608-GN 607-PK-16

200-BK-16 200-BK-16

603-PK-16 608-GN-16 607-PK-16 200-BK-16

REAR UPPER WIPER MOTOR 6T-6529 L41 L41

COM 1

L41

L41

H

EE

A

200-BK-16 200-BK-16

200-BK-16

603-PK-16

E

OR-14 RD-14

MOTOR

BK-14

EE

OPERATOR STATION

C

H

200-BK-16

B

604-OR

L

W/ATCH HARNESS SS CONNECT HARNESS C AND BEACON 9R-8250 AS SHOWN

Z

BK-6 Z

TO PLATFORM 200-BK-16 200-BK-16

REAR LOWER WIPER MOTOR 9X-4530

BEACON FIXED 9R-8250 MAGNETIC 9X-8079

L30

419-YL 322-GY 538-BR-16 L25 128-PK 536-WH-16 143-BR 605-YL-16 L24 606-GY-16 604-OR 521-YL L23 522-WH 113-OR 406-PU L19 405-GY

SS 603-PK-16

576-PK 577-PU A512-GN

200-BK-16 200-BK-16 200-BK-16 200-BK-16

QQ

506-PU

L17

603-PK-16

BEACON 9R-8250

INTERMITTENT ADJ INTERMITTENT LOW HIGH GROUND

GND H MOTOR

QQ

200-BK-16 200-BK-16

L

C

419-YL 419-YL

WW

143-BR 766-GN

SS

200-BK 577-PU 576-PK 119-PK

E

200-BK-16

UU TT 4 3 2 1

BB

POS NEG BATTERY

E

OPERATOR STATION

603-PK-16 200-BK-16

UU 119-PK

RD-00 RD-00 BK-00 3T-5760

102-BU-16

B+

116-BR

SS

N/C 2 200-BK 3 N/O

AA

605-YL-16 617-BR-16 611-PU-16 200-BK-16 619-GN-16

L6

617-BR-16 604-OR 605-YL-16 200-BK-16

WIPER DISCONNECT SW COM 1 6T-5925

200-BK-16

PARK BRAKE SW 6T-5925

OPERATOR STATION

310-PU

STOP/TURN/ TAIL LAMP 92-2992

L14

L14

BATTERY 3T-5760

1 2

1 604-OR 617-BR-16 2 3 605-YL-16 4 200-BK-16 NN B

1 2 3 4 5 6 7 8 9 10 11 12

F

YL OR GY BK-16

RD-00

POS NEG

BK-00 BK-00

AA

611-PU-16 619-GN-16 605-YL-16 200-BK-16 617-BR-16

L13

521-YL 513-OR

L13

607-PK-16 200-BK-16

L7

C

608-GN-16 200-BK-16

1

BK-6

L13 C

REAR FLOOD LAMP 9X-6853

2

FRONT FLOOD LAMP 9W-1001

C

RD-00 RD-00

5

101-RD-6

6

L4

7

8

9

KF WIGGINTON 08APR92

SENR3165-01 November 1987

Circuit Color Number

3 22

3 6

10

8

A

24

9

24

16

7

4 12

5

2

9

6

2

7 18 19

5

1

4

11

21

14 1

12

11 20

13 15

17

23

Backhoe Loader Electrical System

10

B

8

5PC1-11999 7BC1-3999 5KF1-999 9 10

A

17 4

3

B 1

4 12

5 22

2

1

18 9

13

11

24 6

8

7

5

10

16

14

21

6 3

15

11

19 7 2

20

GY GY WH BU WH BR BU GN GN

700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749

PK OR OR BU GY PK BR PU YL OR GN BR WH OR YL GN BU BR PU BR WH OR YL GN BU GN BU PU OR BU BR BR WH OR YL GN BR WH OR YL GN PU BU GY PK WH BR OR

750 751 752 753 754 755 756 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790

GN GN YL GY BU OR WH GY YL BU PU OR GN WH OR BU GN PU BR GY YL BR YL PU BR WH PU PK GY OR YL PK GN WH YL PK BU

C14612X1

23

8

630 631 632 633 634 635 635 636 637

Description Lighting Circuits (Continued) FLOOD REAR (ATTACH) FOG LAMP-RIGHT FOG LAMP-LEFT ATTACH LIGHTING CIRCUIT HEAD LAMP SW TO WORK/HEAD LAMP JUMPER TURN SIGNAL COMMON PAYLOAD MONITOR RED LIGHT PAYLOAD MONITOR GREEN LIGHT LOCKUP CLUTCH LAMP Control Circuits ANTISPIN TEST SWITCH TRANSMISSION LOCKUP CLUTCH SOL (SCRAPER) TRANSMISSION BRAKE SWITCH JUMPER TRANSMISSION UP SOLENOID TRANSMISSION DOWN SOLENOID TRANSMISSION LOCKUP CLUTCH SOL BASIC TRANSMISSION RETARDER SWITCH TRANSMISSION BED RAISE SWITCH TRANSMISSION HOLD SWITCH TRANSMISSION PICKUP POWER TRANSMISSION SPEED PICKUP SIGNAL TRANSMISSION LEVER CODE 1 TRANSMISSION LEVER CODE 2 TRANSMISSION LEVER CODE 3 TRANSMISSION LEVER CODE 4 TRANSMISSION LEVER CODE 5 TRANSMISSION LEVER CODE 6 BOWL APRON SOL FLOAT/VCTC SOL TRANSMISSION BRAKE SW. TRANSMISSION GEAR CODE 1 TRANSMISSION GEAR CODE 2 TRANSMISSION GEAR CODE 3 TRANSMISSION GEAR CODE 4 TRANSMISSION GEAR CODE 5 TRANSMISSION GEAR CODE 6 STEERING MOTOR RELAY SUPPLEMENTAL STEERING CONTROL SWITCH EJECTOR RETURN SOLENOID EJECTOR RETURN DETENTED SOLENOID EJECTOR EJECT DETENTED SOLENOID EJECTOR KICKOUT ON RETURN SOLENOID SWITCHING GEAR CODE 1 FRONT SWITCHING GEAR CODE 2 FRONT SWITCHING GEAR CODE 3 FRONT SWITCHING GEAR CODE 4 FRONT SWITCHING GEAR CODE 5 FRONT SWITCHING GEAR CODE 1 REAR SWITCHING GEAR CODE 2 REAR SWITCHING GEAR CODE 3 REAR SWITCHING GEAR CODE 4 REAR SWITCHING GEAR CODE 5 REAR SWITCHING NEUTRAL/RUN SW. SWITCHING UP SOLENOID SWITCHING DOWN SOLENOID SWITCHING SYNCHRONIZE SOLENOID SWITCHING NO SYNCHRONIZE SOLENOID SUPPLEMENTAL STEERING DUMP VALVE (MOTOR GR.) SUPPLEMENTAL STEERING GOVERNOR SWITCH (MOTOR GA.) EJECTOR KICKOUT COUNTERSHAFT SHIFT SOLENOID NO. OR 3 COUNTERSHAFT SHIFT SOLENOID NO. 2 LOCKUP CLUTCH CONTROL TO SWITCH COUNTERSHAFT SHIFT SOLENOID NO. 3 OR 1 COUNTERSHAFT SHIFT SOLENOID NO. 4 OR 5 TRANSMISSION LOCKUP CLUTCH SOLENOID LIFT KICKOUT SOLENOID SW. BUCKET POSITIONER SOLENOID SW. TORQUE CONVERTER SWITCH SUPPLEMENTAL STEERING CONTROL SW. (MOTOR GR.) APRON SOLENOID (SCRAPER) TRANSMISSION DISCONNECT SOLENOID ANTISPIN PICKUP POWER ANTISPIN PICKUP TRANSMISSION WHEEL SPEED PICKUP-LEFT WHEEL SPEED PICKUP-RIGHT ANTISPIN SERVICE BRAKE SW. ANTISPIN RETARDER SW. ANTISPIN SERVOVALVE ANTISPIN SOLENOID-LEFT ANTISPIN SOLENOID-RIGHT BRAKE RELEASE RELAY CONTROL BRAKE RELEASE MOTOR DIRECT DRIVE LOW RANGE SOLENOID COUPLER ENGAGE SOLENOID COUPLER DISENGAGE SOLENOID AUGER MASTER SW. TO AUGER SW. 4TH VALVE SW. TO 4TH VALVE SOLENOID DOWNSHIFT INHIBIT LOCKUP CLUTCH INHIBIT ENGINE SPEED CONTROL PRESS. SW. TO MODE SW. ENGINE SPEED CONTROL-HI PRESSURE SWITCH AUGER SWITCH TO AEM RESISTOR ENGINE SPEED (+) CONTROL LEVER LOCK CONTROL LEVER LOCK

Circuit Color Number 791 792 793 794 795 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 838 839 856 857 858 859 860 861 863 864 865 866 867 870 871 872 873 874 878 888 889 890 896 897 898 904 905 906 907 908 910 916 916 917 918 919 929 930 931 932 933

PK OR YL YL YL GN WH BU PK YL BU GN PK GY BR PU GN BU GY GN PK YL WH BR WH BR GY BU YL PK YL BU GN OR GY YL PK PU BU BR GY PK PU OR BU YL WH GY OR PK GY PU GN GN PU WH PK PU YL GY YL BU GY WH OR GN GN BR GY GN PU

Description Control Circuits (Continued) ENGINE SPEED CONTROL-LOW SPEED SOLENOID UNDERSPEED PROPORTIONAL SOLENOID ENGINE SPEED CONTROL-LOW PRESSURE SWITCH PAYLOAD MONITOR TRANSMISSION PICKUP DUAL kW SOLENOID FAST DUMP SW. TO 4TH FUNCTION SW. PAYLOAD MONITOR SENSOR POWER AUTOMATIC MODE-LOCKUP CLUTCH LUBE SOLENOID LUBE PRESSURE SWITCH AUTO FIRE SYSTEM SWITCH POWER AUTO FIRE BRAKE SWITCH AUTO FIRE BRAKE SWITCH AUTO FIRE DISCHARGE SWITCH AUTO FIRE NITROGEN SWITCH TO CONTROL AUTO FIRE NITROGEN SW. TO NITROGEN SW. AUTO FIRE SYSTEM WARNING CKT AUTO FIRE SYSTEM FAILURE CKT. FIRE TEST CKT. FIRE NITROGEN ACTUATION SOLENOID AUTO FIRE AGENT CYLINDER SW. TO NITROGEN SW. AUTO FIRE AGENT SW TO AGENT SW. LOCKUP CLUTCH TRANSMISSION PRESSURE SW. AUTO FIRE ALARM BACKUP ALARM RELAY PAYLOAD MONITOR SERIAL DATA (TX) PAYLOAD MONITOR SERIAL DATA (RX) PAYLOAD MONITOR TRANSMIT KEY LOCKUP CLUTCH PRESSURE SENSOR RETURN FORWARD HYDRST SYNC SOLENOID FRONT GUARD MOTOR FRONT GUARD MOTOR ENGINE UNDERSPEED CONTROL-THROTTLE SWITCH SWING ORIFICE SOLENOID (EXCAVATOR) PAYLOAD MONITOR RIGHT FRONT SIGNAL PAYLOAD MONITOR LEFT FRONT SIGNAL PAYLOAD MONITOR RIGHT REAR SIGNAL PAYLOAD MONITOR LEFT REAR SIGNAL PAYLOAD MONITOR TRANSMIT LCD OUT PAYLOAD MONITOR CLOCK LCD OUT PAYLOAD MONITOR LATCH LCD OUT PAYLOAD MONITOR TEST/SET PAYLOAD MONITOR MODE 3 POINT HITCH CONTROL-DOWN SOLENOID 3 POINT HITCH CONTROL-SOLENOID COMMON 3 POINT HITCH CONTROL-UP SOLENOID FRONT GUARD POWER REAR GUARD POWER DISPLACEMENT SOLENOID 3 POINT HITCH CONTROL-HITCH POSITION 3 POINT HITCH CONTROL-HANDLE POSITION 3 POINT HITCH CONTROL-HOOKUP SWITCH NEUTRAL START CONTROL TO AUGER MASTER SW. REAR GUARD MOTOR REAR GUARD MOTOR IMPACTOR SWITCH TO RELAY CONTACT IMPACTOR SWITCH TO RELAY CONTROL RELAY CONTACT TO DRAWBAR PRESSURE SWITCH TRIGGER SWITCH TO HOUR METER DRAWBAR PRESS. SW. TO RIPPER FRAME PRESS. SW. TRANSMISSION NEUTRALIZER SWITCH TO OVERRIDE SCRAPER TRANSMISSION GEAR CODE 6 SWITCH TO LOCKUP CLUTCH CONTROL ENABLE DUAL HP RELAY TO SWITCH ENGINE OVERSPEED LIGHT AND HORN ENGINE OVERSPEED TEST SWITCH BRAKE RETRACT BREAKER TO RELAY BRAKE RETRACT SWITCH TO RELAY COIL AUTO FIRE NITROGEN SW. TO NITROGEN SW. AUTO FIRE AGENT SWITCH TO AGENT SWITCH AUTO FIRE AGENT SW. TO NITROGEN SW.

Printed in U.S.A.

©1987 Caterpillar All Rights Reserved

12

c1026x1 Circuit Color Number

HARNESS CONNECTOR AND COMPONENT LOCATIONS

A-COMPONENTS INSIDE CAB B-COMPONENTS ON RELAY PANEL Ident.

Schematic Components

Connectors Location

Ident.

Schematic Components

1

Location

1

Alarm-Backup

B-9

12

Solenoid-Front-Drive

C-2

A

Alarm-Fault

C-3

13

Solenoid-Start Aid

F-2

2

Alternator

C-1

14

Solenoid-Transmission Neutralizer

C-2

3

Batteries

F-5

15

Starter

E-2

B

Breaker-Alternator

C-8

16

Switch-Backup Alarm

D-3

B

Breaker-Running Lamp

C-8

A

Switch-Beacon

D-7

A

Flasher

C-9

A

Switch-Blower and Air Conditioner

E-3

B

Fuse Block

C-8

17

Switch-Bucket Positioner

A-1

A

Gauge-Converter Temperature

D-8

18

Switch-Coolant Temperature

C-2

A

Gauge-Coolant Temperature

D-8

19

Switch-Coolant Temperature (Start Aid)

C-1

A

Gauge-Fuel

D-9

20

Switch-Engine Oil Pressure

D-1

A

Gauge-Tachometer

D-9

A

Switch-Forward Horn

C-4

4

Horn-Forward

D-1

A

Switch-Front Drive

C-6

A

Meter-Service

D-8

A

Switch-Front Wiper

C-6

A

Meter-Volt

D-8

A

Switch-Hazard

D-7

A

Motor-Blower

D-3

A

Switch-Lamp Test

C-4

A

Motor-Fan

E-7

21

Switch-Neutral/Start

C-2

A

Motor-Front Wiper

D-3

22

Switch-Parking Brake

B-7

A

Motor-Rear Wiper

E-9

A

Switch-Rear Flood

D-7

B

Relay-Main

C-7

A

Switch-Rear Wiper

C-6

B

Relay-Start

C-7

23

Switch-Refrigerant

F-1

5

Resistor-Alternator Field

D-7

A

Switch-Running Lamp

D-6

A

Resistor-Blower Motor Speed

D-3

A

Switch-Start

D-8

6

Sender-Converter

C-2

A

Switch-Start Aid

7

Sender-Coolant Temperature

C-1

A

8

Sender-Fuel

A-6

A

9

Solenoid-Air Conditioner Clutch

D-1

10

Solenoid-Bucket Positioner

11

Solenoid-Engine Shutdown

10 CONTACTS

2 3

9 CONTACTS 8 CONTACTS

4 5 6

7 CONTACTS

7

6 CONTACTS

8 9

4 CONTACTS 10

3 CONTACTS

11 12

Harness And/Or Components

A-9R0896 K-9R0893 E-9R0889 H-9R0892 E-9R0889 L-9R0890 E-9R0889 H-9R0892 B-9R0664 E-9R0889 D-9R0802 E-9R0889 E-9R0889 G-9R0887 D-9R0802 E-9R0889 A-9R0896 Front Wiper A-9R0896 Rear Wiper D-9R0802 Engine Oil Pressure Switch E-9R0889 H-9R0892

Schematic Location B-8 B-7 E-3 B-7 A-8 B-4 A-6 C-4 D-3 E-9 D-1 B-8

Switch Specifications Part No.

Function

8N1693

Engine Coolant Temp. (Start Aid)

D-7

6T1546

Engine Oil Pressure

Switch-Thermostat

C-3

6T2665

Engine Coolant Temperature

Switch-Turn Signal

E-4

A

Switch-Wiper Disconnect

E-8

6T4949

Backup Alarm (Pressure)

A-4

24

Switches-Brake(Stop Light)

D-4

D-2

A

Switches-Transmission Neutralizer

D-6,D-4

Ident.

N.O = NORMALLY OPEN

N.C. = NORMALLY CLOSED

Actuate

37.8 ± 2.8°C (100 ± 5°F) 93 ± 21 kPa (13.5 ± 3.0 psi) 107.2 ± 2.8°C (225 ± 5°F) 93 ± 21 kPa (13.5 ± 3.0 psi)

Deactuate

26.7°C min.

(80°F min.)

69 ± 21 kPa (10.0 ± 3.0 psi) 93°C min.

(196°F min.)

69 ± 21 kPa (10.0 ± 3.0 psi)

Normal Condition N.C. N.O. N.O. N.O.

424 425 426 427

GY PK BR GN

428 429 430 431 432 433 434 435 436

OR YL BU GN PK BU BU YL OR

437

BR

438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 483 484 485 A400 A402 A417

YL YL BR OR GY YL BU GN PU PK WH BU YL BR PU PK GN YL BR PU PK PK BU OR YL YL GY OR WH WH YL GN PU PK OR GY WH BR BU YL GY BU PK GN BR YL YL PK BU WH

500 501 502 503 504 505 506 507 508 509 510 511 512 513

BR GN OR BR YL BU PU WH PU WH YL BR GN OR

514 515 516 517 518 519 520

PU GY GN BU OR PK WH

521 522 523

YL WH BR

C14611X1

Description Monitoring Circuits (Continued) OPERATOR MON PANEL POWER TRAIN TEMP OPERATOR MON PANEL POWER TRAIN OIL LEVEL OPERATOR MON PANEL POWER TRAIN OIL FILTER OPERATOR MON PANEL POWER TRAIN OIL FILTER JUMPER OPERATOR MON PANEL TRANSMISSION OIL TEMP OPERATOR MON PANEL BRAKE OIL TEMP OPERATOR MON PANEL AIR FILTER OPERATOR MON PANEL LOW TRANSFER PUMP PRESS. OPERATOR MON PANEL BRAKE PRESS. (OIL) OPERATOR MON PANEL BRAKE PRESS. (OIL) JUMPER OPERATOR MON PANEL POWER TRAIN TEMP JUMPER OPERATOR MON PANEL POWER TRAIN TEMP JUMPER OPERATOR MON PANEL POWER TRAIN OIL FILTER JUMPER OPERATOR MON PANEL FUEL LEVEL TO FUEL FILTER JUMPER OPERATOR MON PANEL COOLANT TEMP JUMPER LAMP INDICATOR AIR PRESSURE GAUGE ENGINE COOLANT TEMP GAUGE HYDRAULIC SYSTEM TEMP GAUGE POWER TRAIN TEMP GAUGE CONV/RETARDER OIL TEMP GAUGE (TRACTOR) CON V/RETARDER OIL TEMP GAUGE (SCRAPER) BRAKE OIL TEMPERATURE GAUGE FUEL LEVEL GAUGE AIR PRESSURE GAUGE SPEEDOMETER SENDER (SIGNAL NO. 1) TACHOMETER SENDER (+) TACHOMETER SENDER (-) TORQUE CONVERTER SECONDARY STEERING FAULT LAMP RETARDER INDICATOR LAMP CONVERTER TEMP SW. TO TIME DELAY MONITOR PANEL PTO MONITOR PANEL GROUND SPEED SENDER MONITOR PANEL +V MONITOR PANEL IMPLEMENT POSITION MONITOR PANEL PROGRAM PIN OPERATOR PANEL BRAKE AIR PRESS. JUMPER STEERING MOTOR INDICATOR SENSOR PRESENT MONITOR PANEL ENGINE OIL PRESSURE SENSOR LOW CHARGE PRESSURE WARNING MONITOR PANEL STEERING OIL TEMPERATURE SYSTEM FAULT (HYDRST) BRAKE OIL CIRCULATION JUMPER FUEL LEVEL SENDER B+ CANE SWITCH NEUTRAL TRANSMISSION NEUTRAL TO PARKING BRAKE PARKING BRAKE SW TO OVERSTROKE SW. OVERSTROKE SW. TO OVERSTROKE SW. OVERSTROKE SW. TO OVERSTROKE SW. OVERSTROKE SW. TO TRAILING UNIT CONTROL LEVER LOCK INDICATOR SPEEDOMETER SENDER (SIGNAL NO. 2) PRESS. SW. TO RED LAMP-IMPACT RIPPER PRESS. SW. TO GREEN LAMP-IMPACT RIPPER NEUTRAL-CST TO AWD CONV TEMP SW. TO BRAKE OIL TEMP SW. BRAKE FLUID LEVEL PRIMARY STEERING LAMP OPERATOR MON PANEL ALL WHEEL DRIVE FAULT FUEL PRESSURE SENDER COOLANT PRESSURE SENDER EMS SCRAPER TRANSMISSION Accessory Circuits WINDSHIELD WIPER - FRONT (PARK) WINDSHIELD WIPER - FRONT (LOW) WINDSHIELD WIPER - FRONT (HIGH) WINDSHIELD WIPER - REAR (PARK) WINDSHIELD WIPER - REAR (LOW) WINDSHIELD WIPER - REAR (HIGH) WINDSHIELD WASHER - FRONT WINDSHIELD WASHER - REAR RADIO SPEAKER-LEFT RADIO SPEAKER-LEFT (COMMON) WINDSHIELD WASHER-PRIMER RADIO SPEAKER-RIGHT RADIO SPEAKER-RIGHT (COMMON) AIR CONDITIONER COMPRESSOR/REFRIGERANT PRESS. SW. AIR CONDITIONER CONDENSER MOTOR BLOWER MOTOR (HIGH) BLOWER MOTOR (MEDIUM) BLOWER MOTOR (LOW) HAZARD FLASHER TO SWITCH THERMOSTAT TO REFRIGERANT PRESS. SW. OPERATOR AIR CONDITIONER SWITCH TO THERMOSTAT/FUSE AIR COND SW. TO REFRIGERANT SWITCH AIR COND CLUTCH TO THERMOSTAT SW. WINDSHIELD WIPER-LEFT (PARK)

Circuit Color Number 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586

BU GY YL GN PK WH OR WH WH OR WH BU WH OR BR BU WH GN BU BR RD BU BU OR GY PK OR YL WH YL PK OR WH YL GN YL GN BU YL PU GY PU YL WH GN PK BU OR PU ON WH YL PK PU BU BR OR GY PK OR YL YL BR

600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629

BR GY WH PK OR YL GY PK GN YL OR PU GY PK PU YL BU BR YL GR WH GY PU BU YL BK BU YL PK PK

Description Accessory Circuits (Continued) WINDSHIELD WIPER-LEFT (LOW) WINDSHIELD WIPER-LEFT (HIGH) WINDSHIELD WIPER-RIGHT (PARK) WINDSHIELD WIPER-RIGHT (LOW) WINDSHIELD WIPER-RIGHT (HIGH) WINDSHIELD WASHER-LEFT WINDSHIELD WASHER-RIGHT FIRE WARNING HORN FIRE WARNING LAMP HEAT SENSOR/TEST SW. HEAT SENSOR/TEST SW. WINDSHIELD SW. TO WIPER SW. HAZARD SWITCH TO TURN SWITCH TURN SIGNAL SW. TO FLASHER HAZARD INDICATOR TURN SIGNAL INDICATOR BASIC/RIGHT TURN SIGNAL INDICATOR LEFT ACCESSORY 1 ACCESSORY 2 TRAILER CONNECTOR (TAIL LAMP) TRAILER CONNECTOR (STOP LAMP) TOGGLE SW. TO BUTTON:MOMENTARY TILT ENABLE AUX HYDRAULIC-ROTATE CLOCKWISE AUX HYDRAULIC-ROTATE COUNTER-CLOCKWISE AUX HYDRAULIC-OPEN AUX HYDRAULIC-CLOSE AUX HYDRAULIC LEFT-DISCONNECT TO SW. AUX HYDRAULIC RIGHT-DISCONNECT TO SW. FOUR WHEEL DRIVE SOLENOID PITCH SOLENOID TO TRIGGER SW-DUAL TILT MOMENTARY SW. TO SINGLE TILT SOL.-DUAL TILT TRIGGER SW. TO TOGGLE-DUAL TILT DIFFERENTIAL LOCK TRAILER CONNECTOR (LEFT TURN/HAZARD) TRAILER CONNECTOR (RIGHT TURN/HAZARD) AUTOLUBE SOLENOID HALON PRESS. SW./HALON PRESS. SW. HALON PRESS. SW/NITROGEN PRESS. SW. NITROGEN PRESS. SW/NITROGEN PRESS. SW. NITROGEN PRESS. SW./ FIRE MONITOR REAR WIPER INTERRUPT SW. TO WIPER SW. TOGGLE SW. TO BUTTON: MOMENTARY TILT DISABLE CONDENSER RELAY COIL TO THERMOSTAT SW. A/C SWITCH JUMPER WARNING BUZZER TO DIODES A/C SWITCH JUMPER NO. 2 BLADE CUSHION SOLENOID DOZER FLOAT SOLENOID/BUCKET BLADE FLOAT LIMIT SW. NO. 1 BLADE FLOAT LIMIT SW. NO. 2 BLADE FLOAT SOLENOID WINDSHIELD WIPER-AUX (PARK) WINDSHIELD WIPER-AUX (LOW) WINDSHIELD WIPER-AUX (HIGH) WINDSHIELD WASHER-AUX A/C BLOWER MOTOR NO. 1 A/C BLOWER MOTOR NO. 2 LEFT REAR TURN/HAZARD RIGHT REAR TURN/HAZARD A/C BLOWER TO BLOWER BREAKER WIPER SWITCH JUMPER AUX HYDRAULIC-OPEN AUX HYDRAULIC-CLOSE Lighting Circuits DASH BASIC DASH HIGH DOME LAMP ROTARY BEACON STOP LAMP TURN-LEFT TURN-RIGHT FLOOD-FRONT FLOOD-REAR FLOOD-SIDE HEAD LAMP BASIC HEAD LAMP HIGH BACKUP LICENSE PLATE PARK/TAIL/DASH CAB FLOOD/ROPS BUCKET FLOOD/BOOM FLOOD TAIL/POSITION LAMP-LEFT (ROADING PACKAGE) TAIL/POSITION LAMP-RIGHT (ROADING PACKAGE) HEAD LAMP LOW FLOOD-FRONT (ENGINE FLOOD LAMP) FLOODLAMP INDICATOR LAMP FLOODLAMP 3 WAY SWITCH JUMPER FLOODLAMP 3 WAY SWITCH JUMPER FLOODLAMP BOWL COURTESY LAMP DASH DIMMER FOG LAMP RIGHT TURN DASH INDICATOR AUX HEAD LAMP

Circuit Color Number 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 156 157 158 159 160 161 162 163 165 167 168 169 170 171 172 173 174 175 176 176 177 178 180 181 182

RD BU YL YL BR WH WH BU OR GN YL PU OR GN PK BR YL GY PK YL YL BU WH GN OR PK OR PK BU GN BR PK OR PK BU GN OR GN OR BU PK BU BK GN BU GY PU WH PU OR GN BU WH WH YL YL BR BU PU PK YL WH YL OR GN PK YL GN GN YL PK PK YL OR OR GN GN GY PU

200 201 202 203 204 205 206 207 208 209 210 211 212 213

BK BK BK BK BK BK BK BK BK BK BK BK BK BK

C14610X1

Description

Circuit Color Number

Power Circuits BATTERY HEAD LAMP DOME/DASH LAMP/PARK, TAIL LAMP TORQUE CONVERTER SWITCH KEY SWITCH MAIN POWER RELAY/INPUT ENGINE SHUT DOWN/AUTO FIRE CONTROL MISC WIPER, DOME LAMP, CIGAR LIGHTER ALTERNATOR WINDSHIELD WIPER SW. (RIGHT) WINDSHIELD WIPER SW. (LEFT) MAIN POWER RELAY/OUTPUT OPERATOR MONITOR PANEL WARNING HORN (FORWARD) FLOOD LAMP (FRONT) FLOOD LAMP (REAR)-(SIDE ON D8,D9,D10,D11) FLOOD LAMP (SIDE) WINDSHIELD WIPER SW. (FRONT) WINDSHIELD WIPER SW. (REAR) CONVERTER (24 V to 12 V) BACKUP ALARM/LAMP AIR DRYER GAUGES (SERVICE METER, TORQUE CONV SOLENOID) AIR CONDITIONER FUEL TRANSFER PUMP TRANSMISSION CONTROL CAB FLOOD LAMP KICKOUT SOLENOID SW. CIGAR LIGHTER STOP LAMP AUX FLOODS FIRE CONTROL-OPERATOR WARNING ANTISPIN CONTROL MAIN POWER RELAY DIAG RES TO DIAGNOSTIC PROGRAMMED ELECTRONIC ENG CONT LOGIC AM/FM RADIO SUPPLEMENTAL STEERING STEERING MOTOR FUSE-SMALL TRUCKS AUTOMATIC LUBE PUMP/PAYLOAD MONITOR BRAKE RELEASE RELAY BRAKE RELEASE SWITCH AUXILIARY HEATER/DEFROSTER (FRONT) FAST DUMP SOLENOID TRANSMISSION DISCONNECT SWITCH FOG LAMP/BEACON DUAL HP SOLENOID SWITCH ACCESSORY SWITCH 1 ACCESSORY SWITCH 2 A/C SWITCH FLOODLAMP (FRONT ATTACHMENT) FLOODLAMP (REAR ATTACHMENT) DEFROSTER AUX. WIPER SWITCH 3 PT. HITCH CONTROL AIR CONDITIONER CB RADIO TURN FUSE TO HAZARD SWITCH B+ TO CONDENSER RELAY CONTACT WIPER MOTOR - RIGHT WIPER MOTOR - LEFT HAZARD FUSE TO HAZARD SWITCH AUXILIARY HYDRAULIC LEFT AUXILIARY HYDRAULIC RIGHT/SWING DIFFERENTIAL LOCK/APRON SOLENOID LOCKUP CLUTCH REFUELING PUMP BLADE CUSHION BLADE FLOAT DOZER FLOAT HAZARD FUSE TO FLASHER TURN FUSE TO FLASHER CUSTOMER ADD-ONS TRAILER TURN/HAZARD CUSTOMER ADD-ONS CRANKCASE GUARD - PUMP MOTOR MAIN BREAKER MAIN BREAKER DUAL H.P. BREAKER ENGINE SPEED CONTROL- +BATTERY ENGINE UNDERSPEED CONTROL Ground Circuits MAIN CHASSIS OPERATOR MONITOR PANEL TRANSMISSION CONTROL CHASSIS DIAGNOSTIC OPERATOR MONITOR PANEL (SCRAPER) INSTRUMENT BATTERY SIDE OF DISCONNECT STARTER DIAGNOSTIC TRAILER CONNECTOR (GROUND) FIRE SUPPRESSION SYSTEM CONVERTER OUTPUT (24/12 VOLT) DISCONNECT DIAGNOSTIC RESISTOR ANTISPIN CODING PIN 16 ANTISPIN CODING PIN 17

214 215 216 217 218 219 220 221 222 223 224 226 227 228 230 231 232 233 234 236 240 241 242 243 244 250 251 252 256 257 258 259 260 261 262 263

BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK BK

301 302 304 305 306 307 308 309 310 311 312 313 314 315 316 317 320 321 322 323 324 325 326 327 328 329 330 331 332 333

BU OR WH BU GN OR YL GY PU WH PK GY PU GN PK YL OR BR GY WH BU PK PU PK OR YL YL OR BU GN

400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420

GN BU YL GN YL GY PU PK WH OR WH PK BU BR PK GN OR GY WH YL OR

421 422 423

BU YL PU

Description Ground Circuits (Continued) ANTISPIN CODING PIN 18 ANTISPIN CODING PIN 19 ANTISPIN CODING PIN 20 TRANSMISSION CODING PIN 17 TRANSMISSION CODING PIN 18 TRANSMISSION CODING PIN 19 ENGINE OIL PRESSURE SENSOR ENGINE COOLANT TEMP SENSOR MONITOR PANEL CODING 1 MONITOR PANEL CODING 2 ENGLISH/METRIC CODING HYD OIL TEMP SENSOR TRANSMISSION CODING PIN 37 FUEL LEVEL SENDER TMC ACTUATOR GROUND TRANSMISSION SWITCH ENGINE SPEED CONTROL SOLENOID GROUND ENGINE UNDERSPEED CONTROL-PROPORTIONAL SOL ENGINE SPEED CONTROL SOLENOID GROUND TRANSMISSION CODING PIN 36 ENGINE SPEED CONTROL OPERATOR MON PANEL TIME DELAY PIN 3 OPERATOR MON PANEL TIME DELAY PIN 4 OPERATOR MON PANEL TIME DELAY PIN 5 OPERATOR MON PANEL TIME DELAY PIN 6 PAYLOAD MONITOR-CUSTOMER GROUND PAYLOAD MONITOR-SYSTEM GROUND PAYLOAD MONITOR-DISPLAY TO CONTROL LUC HARNESS CODE 0 LUC HARNESS CODE 1 LUC HARNESS CODE 2 LUC HARNESS CODE 3 TECH ID CODE 0 TECH ID CODE 1 TECH ID CODE 2 TECH ID CODE 3 Machine Basic Circuits STARTER NO. 1 SOLENOID TO RESISTOR STARTER NO. 1 RESISTOR TO DIAGNOSTIC STARTER RELAY NO. 1 OUTPUT KEY SWITCH TO ALARM HORN STARTER RELAY COIL/NEUTRAL START SW. OR KEY SW. KEY SW. TO NEUTRAL START SW. MAIN POWER RELAY COIL ALTERNATOR REGULATOR TERM ETHER SW. TO ETHER SOLENOID ETHER SOLENOID TO TEMPERATURE SW. STARTER NO. 2 SOLENOID TO RESISTOR STARTER1 NO. 2 RESISTOR TO DIAGNOSTIC STARTER RELAY NO. 2 OUTPUT START AID BREAKER TO START AID RELAY CANE TO ELEVATOR NEUTRAL START SW. JUMPER START AID RELAY TO START AID SOLENOID HORN RELAY COIL TO SWITCH BACKUP ALARM/LAMP/TRAVEL ALARM WARNING HORN (FORWARD) FUEL TRANSFER PUMP POWER DIFFERENTIAL LOCKUP SOLENOID FUEL PUMP RELAY OIL PRESSURE SW. KEY SWITCH C” TERMINAL SHUTDOWN SOLENOID SHUTDOWN MODULE OFF FUEL PUMP TO SWITCH NEUTRAL START RELAY COIL BACK-UP ALARM RELAY COIL SHUTDOWN SWITCH TO SHUTDOWN CONTROL SCRAPER KEY SW. “A” TERMINAL Monitoring Circuits SERVICE METER SWITCH HYD OIL TEMP GAUGE SENSOR B+ COOLANT TEMP GAUGE SENSOR B+ ALTERNATOR (R) TERMINAL OPERATOR MON PANEL HYDRAULIC OIL TEMP OPERATOR MON PANEL OIL PRESS. (LOW SETTING) OPERATOR MON PANEL COOLANT TEMP OPERATOR MON PANEL CON V/RETARDER OIL TEMP OPERATOR MON PANEL BRAKE PRESS. (AIR) OPERATOR MON PANEL NEUTRAL OPERATOR MON PANEL FAULT ALARM OPERATOR MON PANEL MASTER FAULT LAMP OPERATOR MON PANEL COOLANT FLOW OPERATOR MON PANEL FUEL PRESS. OPERATOR MON PANEL LOW FUEL OPERATOR MON PANEL TEST SW. SECONDARY STEERING SW. PRIMARY STEERING SW. OPERATOR MON PANEL OIL PRESS. (HIGH SETTING) OPERATOR MON PANEL PARKING BRAKE OPERATOR MON PANEL FUEL FILTER/LOW ACCUM PRESS. OPERATOR MON PANEL FAULT LAMP (SCRAPER) OPERATOR MON PANEL WARNING HORN (SCRAPE OPERATOR MON PANEL TEST SW. (SCRAPER)

9

8

7

6

5

4

605-YL-14 200-BK-14 610-OR-14

608-GN

FLOOD LAMP 9W1001

3

TURN LAMP 7T3873

2 1 B

1

2

START AID SOLENOID 3T9493

200-BK

BK BK

605-YL-14 200-BK-14

BATTERY 3T5760 AA

F

610-OR-14

BK-00

2 1

RD-00

TURN LAMP 7T3873

310-PU 311-WH D

POS NEG B

1 2

BB

HEAD LAMP 9X0406

200-BK-14 RD-00 BK-00

F

POS NEG BATTERY 3T5760 3 2 1

604-OR 617-BR 200-BK

200-BK 200-BK 200-BK-14 200-BK

BK-6

Z

TO FRAME

TO PLATFORM

OPERATOR STATION

521-YL 513-OR OPERATOR STATION

BEACON 7T0618

DOME LAMP 4M3601

200-BK

102-BU-14 200-BK-14 605-YL-14 610-OR-14 200-BK-14 119-PK L 1 2 3 4 5 6 7 8 9 10

200-BK-14 N.C. 119-PK TURN SIGNAL SW 7T3946

BLOWER SW 6P3236

L

H

E

306-GN

766-GN 143-BR

2 1

304-WH-10 101-RD-6

1 2 3 4

E

503-BR 504-YL 505-BU 564-GY 500-BR 501-GN 502-OR 118-GY

BK-00 200-BK

310-PU 311-WH

TO PLATFORM

200-BK 766-GN

1 2

BK BK

406-PU

1 2

311-WH COOLANT SW 8N1693

COOLANT SENDER 7N8532

T-

441-OR

NEUTRAL/ START SW 8C5492

T-

1 2

BK BK

536-WH-14 537-GN-14 161-PK-14 157-YL-14

CIRCUIT NOT CONNECTED

D+ B+ W ALT ALTERNATOR 7T2876

ELECTRICAL CONNECTION TO VEHICLE STRUCTURE

109-OR-6

405-GY 406-PU 310-PU 400-GN 450-YL 441-OR 308-YL 309-GY

INTERNAL ELECTRICAL CONNECTION TO SURFACE OF COMPONENT CONNECTOR

C

ATCH WIRE, CABLE, COMPONENT

TO ENGINE

IDENT

D 304-WH-10

E

D

E

D

101-RD-6

121-YL 321-BR

109-OR-6 Q 308-YL 309-GY 441-OR 443-YL 306-GN 307-OR 121-YL 128-PK 143-BR 200-BK-14

H H E

N

H

E

109-OR-6

R 2 1

1 2 3 4 5 6 7 8 9 10

N

447-PK 400-GN 450-YL 310-PU 618-YL 617-BR 603-PK 608-GN 536-WH-14

113-OR 610-OR-14 538-BR-14 M

1 2 3 4 5 6 7 8 9

K

T

A

552-WH

506-PU

124-GN-10 K

1 2 3

1 5 3 4 2 6 7 8 9 10

K

101-RD-6 109-OR-6 304-WH-10

102-BU-14 119-PK 504-YL 503-BR 505-BU 502-OR 501-GN 500-BR 118-GY 564-GY

B

521-YL 522-WH

P

552-WH

OPERATOR STATION

E 200-BK-14 200-BK PARK BRAKE SW 6T5925 419-YL 200-BK

143-BR 536-WH-14

A

STOP/ TAIL LAMP 7T3872

S T

3 2 1

BUCKET POSITIONER SOLENOID 9T7304

604-OR 618-YL 200-BK 608-GN 603-PK 617-BR 618-YL 610-OR-14 604-OR 605-YL-14 606-GY-14

B TURN LAMP 7T3873

2 1

606-GY-14 200-BK-14

608-GN

321-BR 121-YL 447-PK 400-GN 322-GY 200-BK 128-PK

7 2 4 8 1 5 3 6 B

FLOOD LAMP 9W1001

E FUEL SENDER 7W1279

E

9

BK BK

2 1

762-YL 128-PK

CHG LOC

A B D E G H K L P Q R V W DD

04 05 10 09 03 02 01 06 04 02 00 02 02 02

C J M N T U X Z EE

WIRE AS. 7W0810 9R0895 9R0984 9R2206 9R0902 9R0763 9R0894 9R1176 1V1151

04 03 05 01 04 05 05 02 01

AA AA BB BB CC

CABLE AS. 9R1035 9R1083 9R1175 9R1925 7P6682

04 06 02 03 01

NOTE

B-8 A-8 C-4 B-7 A-6 B-7 B-8 E-3 C-2 E-3 B-4 D-3 D-3 E-3

B

C-1 D-7 B-8 B-8 B-8 C-4/C-5 D-9 F-5 E-7

F-5 F-5 F-5 F-5 E-2

STD ATCH STD ATCH

7

762-YL

400-GN

400-GN

1 COM

N.O. BUCKET POSITIONER SW 6T5925

A

THIS SCHEMATIC IS FOR THE 416, 426, 428, 436 & 438 BACKHOE USA (6T7621 CHG 05) G

610-OR-14 200-BK-14 447-PK

HEAD LAMP 9X0406 COMPONENTS ARE SHOWN INSTALLED ON A FULLY OPERABLE MACHINE WITH THE KEY AND ENGINE OFF, AND XMSN SHIFTER IN NEUTRAL

B

610-OR-14 606-GY-14 200-BK-14

8

N.C. 2 3

762-YL

G

7 6 5 4 3 1 2

610-OR-14 606-GY-14 200-BK-14

200-BK

PART NO. HARNESS AS. 9R0896 9R0664 9R0802 9R0889 9R0887 9R6792 9R6793 9R0890 9R0985 9R0803 9R7811 7T3550 9R2400 7T3551

128-PK 538-BR-14

200-BK-14 605-YL-14 604-OR 610-OR-14 617-BR 603-PK 608-GN

B

C

CIRCUIT CONNECTED

450-YL 309-GY

D

E

DESCRIPTION

BLADE, SPADE, RING, OR SCREW TERMINAL

200-BK

200-BK 200-BK 200-BK-14

COLOR RED WHITE ORANGE YELLOW PINK BLACK GRAY PURPLE BROWN GREEN BLUE

SYMBOL

P

D

E

RD WH OR YL PK BK GY PU BR GN BU

200-BK

FRONT DRIVE SOLENOID 6T9519

405-GY 406-PU 310-PU 400-GN 450-YL 441-OR 308-YL 309-GY

BK BK

T-

307-OR

THERMOSTAT SW 6T9395

R

FORWARD HORN 7T0635

ABBREV

306-GN T-

AIR CONDITIONER CLUTCH SOLENOID 8T8812

COOLANT SW 6T2665 200-BK

D

143-BR 766-GN 321-BR 306-GN 307-OR 443-YL

5 8 7 6 2 1 4 3

D

RD BK 321-BR 200-BK

521-YL 522-WH

TRANSMISSION NEUTRALIZER SOLENOID 6T9519

D

2 6 1 3 4 5

BU-18 RD-18 BK-18 ENGINE OIL SW 6T1546

CONVERTER TSENDER 4W9972 200-BK 552-WH

OPERATOR STATION

U

3 2 1

2 1

OPERATOR STATION

D 405-GY 400-GN 200-BK

D

W

766-GN 143-BR

118-GY

109-OR-6 304-WH-10

BACKUP ALARM SW 6T4949

TO ENGINE

443-YL

608-GN

109-OR-10 109-OR-6

304-WH-10 200-BK

109-OR-10 109-OR-6 109-OR-6

200-BK 308-YL

MAIN RELAY 7X1379

GN OR GY BR

515-GY-12 1 2 FUSE 3K8782 FUSE HOLDER 4K5122

FRONT WIPER 6T6529

FAULT ALARM 7T9157

522-WH 200-BK

LAMP TEST SW 7N8009

520-WH-12

406-PU 405-GY

521-YL

U

322-GY 128-PK

143-BR 766-GN

200-BK 419-YL 322-GY 538-BR-14 128-PK 536-WH-14 143-BR 605-YL-14 606-GY-14 604-OR 521-YL 522-WH 113-OR 406-PU 405-GY

FORWARD HORN SW 3T2357

DIODE 9P5153

200-BK 200-BK 200-BK

10A

H

B B

E W

MOTOR

200-BK

L

W P

1 2

START RELAY 302266

B B

T-

ENGINE SHUTDOWN SOLENOID 7W6249

308-YL 200-BK

200-BK 200-BK

322-GY 200-BK

515-GY-12 516-GN-12 517-BU-12

405-GY 405-GY

113-OR 419-YL 406-PU

BLOWER 7T2054

200-BK

118-GY

W P

506-PU

614-PU

121-YL 116-BR 143-BR

PANEL LAMP 8L9801

552-WH

308-YL

308-YL

194-GN-10

112-PU-10

109-OR-10

112-PU-10

10A 10A 10A 10A 116-BR REAR FLOOD 121-YL BACKUP ALARM/BEACON 113-OR MONITOR LAMPS XMSN NEUT/STOP LAMP/FRONT DRIVE

10A 10A 10A

10A 10A REAR WIPER FRONT WIPER

TURN LAMPS GAGES BUCKETPOS/HORN 157-YL-14 123-WH 128-PK

30A BLOWER MOTOR

RELAY 7X1379

143-BR

200-BK-14 200-BK

BACKUP ALARM 6T7622

200-BK

FRONT WIPER SW 3T6655

308-YL

49 49A 31

119-PK 118-GY

ALTERNATOR BREAKER 9S0173

124-GN-10

161-PK-14 105-BR 617-BR 618-YL

101-RD-14 60A

+ BATTERY OUT (LAMP) GROUND FLASHER 7T4848

15A 10A 10A 10A

15A

OPERATOR STATION

C

H

HAZARD LAMPS KEY LEFT TAIL LAMP RIGHT TAIL LAMP

102-BU-14 102-BU-14

101-RD-14

450-YL 447-PK 400-GN 443-YL 441-OR

RUNNING LAMP BREAKER 3T2662

REAR WIPER SW 3T9495

W

113-OR 568-GN

RIGHT TURN IND LAMP 8M6176

FRONT DRIVE SW 7N8000

STARTER 7X1361

MOTOR E

V

194-GN-10 FUSE HOLDER 4K5122 NOTE C

MOTOR

200-BK-12

310-PU

COOLANT TEMP LAMP 8M6176

766-GN 143-BR

START AID SW 7N8001

200-BK

BRAKE SW (NOTE B) 6T5925

766-GN 143-BR

6

COM

S

MTR BAT

WH/RD-14 BK-14

N/C

PARK BRAKE LAMP 8M6176

1

113-OR

3 2

N/O TRANSMISSION NEUTRALIZER SW 9R2612

G

RESISTOR 7T3828

200-BK 606-GY 406-PU

RUNNING LAMP SW 7T3946

TRANSMISSION NEUTRALIZER SW 9R2612

102-BU-14

608-GN

116-BR

603-PK

121-YL R

ST ON OFF

5

536-WH-14 538-BR-14

200-BK

308-YL 308-YL 308-YL

B S C 614-PU-14 123-WH

105-BR 307-OR

200-BK

X H

1 3 4

610-OR-14 614-PU

2

ENGINE OIL PRESS LAMP 8M6176

COM

102-BU

5

HAZARD SW 3T4405

GRD

1

604-OR

REAR FLOOD LAMP SW 7N8000

2

4

614-PU

3 2

N/C

537-GN-14 536-WH-14 161-PK-14 157-YL-14

BEACON SW 7N8000

309-GY

START SW 9G7641

614-PU 614-PU

441-OR 614-PU

200-BK

200-BK

614-PU

443-YL

SERVICE METER 6T7337

GRD

1

H

SEND

GRD

DIODE 9P5153 J

308-YL

123-WH

123-WH 614-PU 400-GN

123-WH

447-PK

COOLANT TEMP GAGE 4W2622 LAMP 8M6176 IGN

VOLTMETER 4W2142 LAMP 8M6176 IGN

SEND

GRD

200-BK

D

SEND

+

614-PU

450-YL 200-BK 200-BK

-

IGN

-

SIG

CONV TEMP GAGE 4W2621 LAMP 8M6176 IGN

+

TACHOMETER 6T7540 LAMP 8M6176

520-WH-12

304-WH-10

124-GN-10

A

N/O RESISTOR 8C4110

BRAKE SW (NOTE B) 6T5925

TO FRAME

1 2 5 4 3

200-BK

123-WH 123-WH

LEFT TURN IND LAMP 8M6176

113-OR

123-WH

FUEL GAGE 4W2620 LAMP 8M6176

RED BLK BLU GRN OR

143-BR

123-WH

604-OR 143-BR

REAR WIPER 6T6529

T-

605-YL

503-BR 504-YL 505-BU 564-GY 119-PK 102-BU-14 500-BR 501-GN 502-OR 118-GY

MOTOR

E CC BK-00

521-YL 513-OR

564-GY 503-BR 505-BU 504-YL

521-YL 522-WH Q

113-OR 405-GY 406-PU

3 4 2 1

2 1 DD 521-YL 522-WH

GY BR OR GN

4 6

BK-6

A

5

RD-00

606-GY-14

1 3

1 2

OPERATOR STATION

E

2

101-RD-6

605-YL-14 TO PLATFORM

605-YL-14 606-GY-14 536-WH-14 538-BR-14 322-GY 128-PK 113-OR 419-YL 406-PU 405-GY

501-GN 502-OR 118-GY 500-BR

605-YL-14 606-GY-14

2 3

N.O. WIPER DISCONNECT SW 6T5925

564-GY

603-PK 617-BR 604-OR 605-YL-14 608-GN 610-OR-14 200-BK-14

200-BK 200-BK-14 200-BK 200-BK-14

COM 1

604-OR 143-BR

E

405-GY 406-PU

FAN 5D2855

BK-14

EE

119-PK

603-PK

1 2

OR-14 RD-14

MOTOR B

RD BK

S T

113-OR 406-PU 405-GY

STOP/ TAIL LAMP 7T3872

REFRIGERANT SW (NOTE A) 5V5698

BK-00

B

6

5

2 1

4

TURN LAMP 7T3873

UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 16 GAGE NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGE NOTE B: NORMALLY CLOSED WHEN BRAKE IS DEPRESSED NOTE C: FUSES 10A-3K8787 15A-8M8948 30A-8M8947

3

2

1

D33915