Cat 432D-BLD Backhoe Loader Electrical + Hydraulic System Schematic Manual – PDF DOWNLOAD

Page 1

CONN 1 CONN 2 CONN 3 CONN 4 CONN 5 CONN 6 CONN 7 CONN 8 CONN 9 CONN 10 CONN 11 CONN 12 CONN 13 CONN 14 CONN 15 CONN 16 CONN 17 CONN 18 CONN 19 CONN 20 CONN 21 CONN 22 CONN 23 CONN 24 CONN 25 CONN 26 CONN 27 CONN 28 CONN 29 CONN 30 CONN 33 CONN 37 CONN 50 CONN 54 CONN 60 CONN 62 CONN 64

Schematic Machine Location Location A-15, C-14, B-13 34 F-15 57 C-13, I-12 59NA, 60COS C-13 57 H-12, I-12 62 H-12, I-12 62 G-12 63 D-11, B-14 64 D-11 63 G-11 A H-11 A H-11 A I-10 63 I-10 63 F-10 A F-10 A F-10 A I-8 A D-8 A I-4 18 H-4 18 H-4 D G-4 D F-4 D I-3 10 H-2 25 H-2 25 E-1 25 I-15, F-1 45 F-1 12 E-10 A F-2 18 C-9 42 H-6 D C-10 2 C-15 8 H-6 24

The connectors shown in this chart are for harness to harness connectors. Connectors that join a harness to a component are generally located at or near the component. See the Component Location Chart.

0168

Battery Voltage Above Normal

0168

Battery Voltage Below Normal

I-8

A

113

OR

E-6

C

Brake Power

613

PK

License Lamp

Operator Monitor Power

614

PU

Backlighting

Power Port

Alternator

E-1

5

Relay - A/C Shutoff

Arc Suppressor - All Wheel Drive

F-4

24

Relay - All Wheel Drive Braking

115

RD

Acc Socket Power

617

Arc Suppressor - HVAC

H-1

25

Relay - Attachment

D-6

C

116

BR

Rear Std Flood Power

Battery

D-4

6

Relay - Aux Lighting

B-6

B

117

YL

Rear Aux Flood Power

Battery

D-4

6

Relay - Aux Flood

D-10

B

118

GY

Block - Lighting Diode

D-12

A

Relay - Cab

C-6

C

119

F-1

86

Relay - High Speed

H-9

A

122

Control - Shuttle Handle

H-6

24

Relay - HVAC

D-6

C

123

WH

XMSN Power

642

WH

License Harness - Rear Turn Lamp

Flasher

G-9

A

Relay - Main

B-6

B

128

PK

RTD Power

C510

WH

Engine Low Speed from Tachometer

Fuse - Air Conditioning

D-7

C

Relay - Pressure Switch Timer

G-13

A

131

RD

Start Aid Power

C511

WH

Engine Stallout Relay

Fuse - Air Suspension Seat

A-7

B

Relay - Start

B-6

B

134

YL

Ride Control Power

C568

WH

HVAC Blower Motor

Fuse - All Wheel Drive

B-7

B

Relay - Std Flood

D-10

A

136

GN

AWS Power

E528

PU

HVAC Blower Run

Fuse - All Wheel Steer

D-7

C

Relay - Std Lighting

A-6

B

143

BR

AWD Power

E529

YL

HVAC Blower Speed Jumper

Fuse - Atch Front Flood

B-7

B

Resistor - Motor Speed

H-9

15

144

GN

Beacon Power

E540

PK

MP Solenoid Common Supply Power

Fuse - Atch Rear Flood

B-7

B

Sender - Converter Temperature

F-1

12

157

YL

Front Aux Flood Power

E543

WH

MP Close Proportional Return

Fuse - Aux Hydraulics

C-7

C

Sender - Coolant Temperature

H-1

13

158

BR

Front Std Flood Power

E544

GN

MP Open Proportional Return

Coil - Thermal Starting Aid

Description

Lighting Circuits

Power Circuits

BR

Left Tail Light

618

YL

Right Tail Light

619

GN

Low Beam Headlamps

Front Wiper Power

620

WH

Front Attachment Flood Lights

PK

Rear Wiper Power

627

YL

Rear Fog Light

BU

HVAC Power

630

GY

Rear Attachment Flood Lights

Fuse - Beacon

D-7

C

Sender - Fuel Level

G-1

11

161

RD

Flasher Power

B-7

B

Sensor - Bucket Position

I-15

16

163

WH

Electric MP Power (Aux. Hydraulics)

702

OR

Brake Switch B To AWD Relay

Fuse - Engine

B-7

B

Solenoid - Bucket Position

F-2

17

170

RD

Dome Light Power

710

GN

Transmission Speed Sensor

Fuse - Front Wiper

D-7

C

Solenoid - Cold Start Advance

F-1

31

180

RD

Powered Air Seat Power

720

PU

Brake Switch A to AWD Relay

Fuse - Horn

A-7

B

Solenoid - Forward Transmission

I-1

18

184

BU

Rear End Power

752

YL

Std Transmission Forward Sol Output

754

BU

Std Transmission Reverse Sol Output

Fuse - Key Start

A-7

B

Solenoid - Front Drive

G-1

19

D-7

C

Solenoid - Fuel Shutoff

E-1

20

200

BK

Main Chassis

755

OR

Transmission Fourth Gear Sol

Fuse - Monitor

C-7

B

Solenoid - Hydraulic Shutoff

H-12

91

202

BK

XMSN Ground

762

YL

Bucket Position Solenoid

Fuse - Power Port

B-7

B

Solenoid - Pilot Shutoff

H-12

92

203

BK

Electric MP Ground

766

GN

Neutralizer Switch

Fuse - Radio

A-7

B

Solenoid - Pilot Hydraulics Shutoff

H-13

91

218

BK

Start Relay Ground

779

WH

Quick Coupler Diverter Valve

Fuse - Rear Hydraulics

B-7

B

Solenoid - Reverse Transmission

I-1

18

265

BK

Dead Engine Lower Enable Ground

911

YL

AWD Switch Jumper

Fuse - Rear Std Floods

A-7

C

Solenoid - Side Shift Lock

H-12

93

281

BK

ECM Harn Code 5

922

BR

Std Transmission Forward Sol Return

Fuse - Rear Wiper

D-7

C

Switch - Air Filter Pressure

I-3

10

A250

BK

MSS LED Ground

923

GY

Std Transmission Reverse Sol Return

Fuse - Ride Control

C-7

C

Switch - All Wheel Drive

F-2

D

944

OR

Cat Data Link (+)

Fuse - Right Tail Lamp

D-7

C

Switch - Atch Front Flood

D-13

A

945

BR

Cat Data Link (-)

Fuse - Signal Lamp

A-7

B

Switch - Atch Rear Flood

D-13

A

Fuse - Spare 1

D-7

B

Switch - Backhoe Handle Pushbutton

H-13

85

Fuse - Spare 2

D-7

C

Switch - Backhoe Handle Pushbutton

I-13

85

Fuse - Start

B-7

B

Switch - Backhoe Hydraulic Shutoff

D-15

A

Fuse - Start Aid

C-7

C

Switch - Beacon

E-13

A

Fuse - Transmission

B-7

B

Switch - Blower Speed

H-10

A

Gauge - Converter Temperature

F-13

A

Switch - Brake A

I-6

22

Gauge - Coolant Temperature

F-13

A

Switch - Brake B

I-6

22

Gauge - Fuel Level

F-12

A

Switch - Brake Fluid Level

I-3

10

Gauge - Tachometer

F-12

A

Switch - Cold Start Temperature

F-1

5

I-8

A

Switch - Coolant Temperature

H-1

3

Monitoring Circuits 304

WH

Starter Solenoid

306

GN

Start Relay Coil

963

GN

Pilot Hydraulics Bucket Position Detent Solenoid

307

OR

Keyswitch Start

973

BR

ECM Auto-Manual (Man) Sw Input

308

YL

Keyswitch Run

975

WH

ECM Transmission Sol Return

309

GY

Alternator Failure

976

OR

Ride Control Solenoid

310

PU

Starting Aid Coil

977

YL

ECM Auto-Manual (Aut) Sw Input

321

BR

Backup Alarm Sig

991

WH

Transmission Neutralizer to ECM

322

GY

Front Horn

A972

OR

ECM to Ride Control Relay

327

PK

Engine Shutdown Solenoid

C701

YL

Park Brake Enable for Autoshift

334

BU

Cold Start Advance Solenoid

C720

BU

Transmission Neutral Lock

338

PK

Main Relay Signal for Aux. Relays

C883

GY

Broom Angle Tilt Left

367

BU

Rear Horn

C884

OR

Broom Angle Relay Interlock

A313

OR

Stabilizer Leg Alarm

C885

PK

Broom Angle Tilt Right

A346

BU

MSS ECM to Start Relay Coil

C920

GY

ECM Diagnostic

A347

GN

MSS ECM to Main Relay Coil

E701

PK

Ride Control Auto Mode

E702

OR

Ride Control Enable Signal

Gauge - Voltmeter

F-14

A

Switch - Engine Oil Pressure

H-1

20

Ground - Cab

D-4

87

Switch - Front Horn

D-2

D

Ground - Engine

D-1

12

Switch - Front Roading Lamps

F-2

3

Ground - Engine

D-3

89

Switch - Hazard

E-2

D

Ground - Frame

D-4

90

Switch - Heater / Air Conditioning

G-10

A

Ground - Right Cab 1

F-7

A

Switch - Heater Vent

H-7

A

405

GY

Low Oil Pressure

E764

OR

Circle Steer Solenoid

Ground - Right Cab 2

E-7

A

Switch - Hydraulic Filter Pressure

G-1

32

406

PU

High Coolant Temp

E803

YL

Left Angle/Steer Sw

Ground - Top of Cab

C-12

1

Switch - Key Start

F-14

A

407

PK

Converter High Temp

E804

BU

Right Angle/Steer Sw

Group - Basic Lamp

H-15

A

Switch - Loader Neutralizer

C-8

85

419

YL

Parking Brake Sw

F738

WH

Loader Cylinder Rod End Press Sw

Group - Fault Lamp

F-15

A

Switch - Neutral Lock

G-2

D

429

YL

Rear Steer Position Sensor

F739

GN

Ride Control Sw to Relay

BU

Dirty Air Filter

F748

WH

Ride Control Manual Mode

Monitoring Circuits

E-4

D

Switch - Park Brake

C-8

42

430

H-13

4

Switch - Rear Horn

D-14

A

439

YL

Full Water Separator

F765

BR

ECM In Gear Output

OR

Coolant Temp Sig

F846

PU

MSS Red LED Indicator

Horn - Forward

G-12

26

Switch - Rear Washer / Wiper

E-14

A

441

Horn - Rear

I-13

4

Switch - Refrigerant Pressure

I-1

25

443

YL

Converter Temp Sig

F871

PU

Rear Steer Left Solenoid (+)

Lamp - Left Headlight

H-2

95

Switch - Return To Dig

I-15

26

447

PK

Fuel Level Sig

F872

BU

Rear Steer Right Solenoid (+)

Lamp - Right Headlight

G-2

96

Switch - Side Shift Lock

E-15

A

450

YL

Tachometer Sig

F877

WH

Rear Steer Right Relay (+)

Meter - Service

D-2

24

Switch - Stalk

H-6

24

483

BR

Low Brake Fluid

F879

PK

Rear Steer Left Relay (+)

Motor - Air Suspension Seat

I-11

29

Switch - Start Aid

E-13

A

E455

BR

Dirty Hydraulic Oil Filter

G703

GN

Dead Engine Lower

I-3

10

A

G423

PK

High Hydr. Filter Pressure (Timer)

G726

GY

Shutoff Solenoid (+)

BR

Front Wiper Park Switch

Motor - Front Washer Pump

Switch - Std Front Flood

G-11 G-11

A

I-7

97

500

Motor - Front Wiper

C-10

2

Switch - Std Rear Flood

Motor - HVAC Blower

H-8

30

Switch - Thermostat

Accessory Circuits

G742

GN

Shutoff Relay (+)

G743

OR

Shutoff Relay (-)

I-3

10

Switch - Transmission Neutralizer

E-5

56

501

GN

Front Wiper Motor - Low Speed

G789

BR

AWS Mode - Circle Steer (+)

Motor - Rear Wiper

C-15

8

Switch - Water Separator

G-1

36

502

OR

Front Wiper Motor - High Speed

G795

OR

AWS Mode - Rear Steer (+)

Motor - Starter

D-2

7

503

BR

Rear Wiper Park Switch

G796

YL

AWS Mode - Rear Steer (-)

504

YL

Rear Wiper Motor

G797

BU

Rear Steer Left Relay (-)

Motor - Rear Washer Pump

0268

Erratic programmed parameter fault

0346

Ride Control Relay Open Circuit

0346

Ride Control Relay Short to Ground

Machine locations are repeated for components located close together.

0346

Ride Control Relay Short to Battery

506

PU

Front Washer

G798

PU

Rear Steer Right Relay (-)

0367

Invalid Ride Control Switch Input

A = Located inside/on right console. B = Located in machine electrical center 1.

0368

Transmission auto/man open circuit

C = Located in machine electrical center 2.

507

WH

Rear Washer

G848

GN

MSS Green LED Indicator

Transmission auto/man grounded

D = Located inside/on front console.

508

PU

Radio Left Speaker (+)

G943

BU

WH

Radio Left Speaker (-)

G981

0368

T

Pressure Symbol

Temperature Symbol

Level Symbol

Symbols and Definitions Fuse: A component in an electrical circuit that will open the circuit if too much current flows through it. Switch (Normally Open): A switch that will close at a specified point (temp, press, etc.). The circle indicates that the component has screw terminals and a wire can be disconnected from it. Switch (Normally Closed): A switch that will open at a specified point (temp, press, etc.). No circle indicates that the wire cannot be disconnected from the component. Ground (Wired): This indicates that the component is connected to a grounded wire. The grounded wire is fastened to the machine. Ground (Case): This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine. 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.

416D, 420D, 424D, 428D, 430D, 432D, 438D, and 442D Backhoe Loaders Electrical System 420D: BKC1-919 BMC1-1059 BLN1-10299 FDP1-18399

416D: BKG1-3499 BGJ1-1049 BFP1-12899 CXP1-939

424D: BGP1-UP BKR1-UP

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.

T

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. 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.

428D: BNB1-UP BLL1-UP BNS1-UP BMT1-UP

Magnetic Latch Solenoid: A magnetic latch solenoid is an electrical component that is activated by electricity and held latched 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.

Harness and Wire Symbols

430D: BNK1-5899 BML1-4800

432D: BLD1-UP

438D: BPE1-UP BPN1-UP

442D: BRG1-UP BRY1-UP

Wire, Cable, or Harness Assembly Identification: Includes Harness Identification Letters and Harness Connector Serialization Codes (see sample).

Harness Identification Letter(s): (A, B, C, ..., AA, AB, AC, ...)

L-C12 3E-5179

AG-C4 111-7898

L-C12 3E-5179

Harness Connector Serialization Code: The "C" stands for "Connector" and the number indicates which connector in the harness (C1, C2, C3, ...).

1

Part Number: for Connector Plug

Part Number: for Connector Receptacle

2 Plug

Receptacle Pin or Socket Number

1 2

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

1 2

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

5A

Volume 1 of 2:

Off Machine Switch Specification Part No.

Function

Actuate

Deactuate

Contact Position

107.2 ± 2.8°C

93°C MIN

Normally

Broom Attachment Present

(225 ± 5°F)

(196°F MIN)

Open

PU

Stabilizer Leg in UP position

62.1 to 95.1 kPa

62.1 to 95.1 kPa

Normally

6T-2665

Engine Coolant Temperature

Trans Configuration Incorrect Invalid Downshift Switch

511

BR

Radio Right Speaker (+)

H730

BR

Transmission Third Gear Sol

0641

Trans Solenoid 1 Open Circuit

512

GN

Radio Right Speaker (-)

H731

GY

Transmission First / Second Gear Sol

0641

Trans Solenoid 1 Short to Ground

513

OR

A/C Compressor Clutch

H767

BR

AWS Mode - Circle Steer (-)

(16 to 20 psi)

0641

Trans Solenoid 1 Short to Battery

--

Normally 2

FMI No.

0642

Trans Solenoid 2 Open Circuit

Rear Steer Left Solenoid (-)

275 to 1750 kPa1

Open

Data valid but above normal operational range.

Trans Solenoid 2 Short to Ground

--

0

0642

(40 to 255 psi)

4.2 ± 1.4°C

Normally

Data valid but below normal operational range.

Trans Solenoid 2 Short to Battery

-0.6 ± 1.4°C

1

0642

2

Data erratic, intermittent, or incorrect.

0643

Trans Solenoid 3 Open Circuit

3

Voltage above normal or shorted high.

0643

Trans Solenoid 3 Short to Ground

4

Voltage below normal or shorted low.

0643

Trans Solenoid 3 Short to Battery

0644

Trans Solenoid 4 Open Circuit

0644

Trans Solenoid 4 Short to Ground

0644 0645

82

46 25

20

36

22

24

10

97

18

8

29

41

3

56

80 93

13

D 2

85 19 12 53 64 15 83 45 47 38 89 62 30 96 1 63 84 6 C 42 60 B A 57

17

4

48

95

91

Trans Solenoid 5 Open Circuit

7

516

GN

HVAC Blower Med Speed

H769

BR

Rear Steer Right Solenoid (-)

517

BU

HVAC Blower Low Speed

H770

BR

Shutoff Solenoid (-)

520

WH

A/C Switch to Fuse

H771

BR

Side Shift Lock Solenoid

521

YL

A/C Refrigerant Pressure Switch

H772

YL

Hydraulic Shutoff Solenoid

522

WH

A/C Thermostat

H809

YL

Stabilizer Timer (L Term)

537

GN

Turn Signal Switch to Flasher Module

H833

PU

Aux Detent - Cont Flow Sw to ECM

552

WH

Front Drive Solenoid

L998

OR

QC Attachment Aux. Hyd. Solenoid (RT)

555

86

568

26

5

BR

BR GN

Thermal Fuse to HVAC Motor Park Brake Alarm

L999 M733

GN PK

Tachometer Low Speed

M913

PU

AWS Indicator

578

BU

Aux. Washer

M968

BU

Coupler Pins Active

585

YL

Quick Coupler Pins Disengage

M969

YL

Coupler Pins Inactive

Trans Solenoid 6 Short to Ground

586

BR

Quick Coupler Pins Engage

N904

PU

Transmission Fwd High Sol

Trans Solenoid 6 Short to Battery

603

PK

Beacon Lights

N905

OR

Transmission Fwd Low Sol

Trans Solenoid 5 Short to Battery

0646

Trans Solenoid 6 Open Circuit

81

90

Thermostat

128-5091

All Wheel Steer Pressure

131-9203

Loader Cylinder Pressure

173-7527

551 kPa Max

344 ± 20 kPa

(80 psi)

(50 ± 3 psi)

5

Current below normal or open circuit.

3500 kPa Max

3000 ± 150 kPa

6

Current above normal or grounded circuit.

(507.6 psi)

(435.1 ± 21.8 psi)

7

Mechanical system not responding properly.

37 to 43°C

Normally

8

Abnormal frequency, pulse width, or period.

Open

9

Abnormal update.

10

Abnormal rate of change.

(99 to 109°F)

Closed

Failure Description

(39.5 ± 2.5°F )

(117 to 127°F)

Pilot Hydraulic Pressure

Failure Mode Identifiers (FMI)1

Open

(31 ± 2.5°F)

47 to 53°C

Cold Start Temperature

194-2553

(12.5 to 15 psi)

SPDT

SPDT

2200 kPa Max

1800 ± 175 kPa

Normally

(319.1 psi)

(261.1 ± 25.4 psi)

Closed

11

Failure mode not identifiable.

12

Bad device or component.

1 With increasing pressure the closed condition can be maintained up to 2800 kPa (405 psi), with decreasing pressure the closed condition can be maintained down to 170 kPa (25 psi).

13

Out of calibration.

14

Parameter failures.

2

15

Parameter failures.

Contact position at the contacts of the harness connector.

Parameter not available.

17

Module not responding.

Shift Lever Not Responding

605

YL

Left Turn Light

N945

OR

AWD Relay to AWD Sw

18

Sensor supply fault.

0668

Invalid Shift Lever Input

606

GY

Right Turn Light

N997

GN

Electric MP Prop. Command (PWM)

19

Condition not met.

0683

In-Gear Relay Open Circuit

607

PK

Front Std Flood Lights

R912

OR

Pilot Hydraulics Lock

20

Parameter failures.

0683

In-Gear Relay Short to Ground

608

GN

Rear Std Flood Lights

T901

YL

MSS Antenna Signal

0683

In-Gear Relay Short to Battery

610

OR

Headlamp Sw to Dimmer Sw

T902

PK

MSS Antenna Return

611

PK

High Beam Headlamps

59

Shift Handle Control (MID2 No. 117) Battery Voltage Above Normal

0168

Battery Voltage Below Normal

0668

Shift Lever Bad Device or Component

95 3

Machine Security Control (MID2 No. 124) Battery Voltage

0248

Cat Data Link Error

0254

ECM

0817

Backup Battery

1391

MSS Output Driver #1

1392

MSS Output Driver #2

91

80

30 32 60

93

1181

Auxiliary Hydraulic Solenoid #2

1184

Auxiliary Hydraulic Solenoid Supply

1187

Continuous Flow Switch

1189

Auxiliary Proportional Lever Switch

1

The CID is a diagnostic code that indicates which component is faulty.

2

The MID is a diagnostic code that indicates which electronic control module diagnosed the fault.

82 62

Sender and Solenoid Specifications

10 86

53

25

22 B 56

C 42

13

18 19 89 52

3E-1908

36 11

Component Description Solenoid: A/C Clutch

97

5 45 12

83

Part No.

20

84

4

Auxiliary Hydraulic Solenoid #1

Quick Coupler Switch

87 15 17

1180

Quick Coupler Solenoid

The FMI is a diagnostic code that indicates what type of failure has occurred.

96

85

29 63

Auxiliary Hydraulic Control (MID No. 106)

1530

A

D 24

38

57

81

2

1529

1

64

0168

0168

2 46

Transmission Rev Sol

16

0668

47

GN

119-9631

Closed Normally

604

41

N907

Refrigerant Pressure

(9 to 13.8 psi) 86.2 to 103.4 kPa

Harness Code Unknown

8

Brake Lights

114-5333

(9 to 13.8 psi) 110.3 to 138 kPa

0650

1

OR

Hyd. Filter Pressure

MSS to Main Relay Coil Return

PK

0645

Engine Oil Pressure

7X-8549

QC Attachment Aux. Hyd. Solenoid (LT)

569

Trans Solenoid 5 Short to Ground

0646

32

87

Trans Solenoid 4 Short to Battery

0645

0646

11 49

52

H768

7W-1238

4W-9972

Sender: Converter Temp

26

17.6 ± 0.6

Related Electrical Service Manuals Title

Form Number

54°C (130°F) - 560 to 716

Alternator:

105-2812

SENR5841

110°C (230°F) - 72 to 82

Optional (90A):

105-2813

SENR5841

143-0539

7

121-4036

Solenoid: Front Drive

10.5

Electric Starting Motor:

90

171-8775

Solenoid: Pilot Hyd. Shutoff

10.5

Autoshift Control:

RENR2869

54°C (130°F) - 560 to 716

Aux Hydraulic Control:

RENR3588

110°C (230°F) - 72 to 82

Machine Security:

RENR2462

6 49

Resistance (Ohms)1

48

175-3070

Sender: Coolant Temp Sender: Fuel Level

187-8936

Machine Harness Connector and Component Locations

1

At room temperature unless otherwise noted.

Full:

240 - 260

Empty:

27.5 - 39.5

Wire Gauge Wire Color

Printed in U.S.A.

© 2012 Caterpillar All Rights Reserved

0621

HVAC Blower High Speed

Component Part Number

325-AG135 PK-14 Harness identification code: This example indicates wire group 325, wire 135 in harness "AG".

0520

GY

9X-1123

Fuse (5 Amps)

509

515

Circuit Breaker Symbol

Flow Symbol

Control Circuits

Fuse - Left Tail Lamp

Ground Circuits

Symbols

Description

Fuse - Bucket Position

Horn - Backup Alarm

Component Autoshift Transmission Control (MID2 No. 81)

RD

4

Group - Function Lamp

CID

111

Wire Color

I-14

Gauge - Tachometer with A/C Shutoff

Component Identifiers (CID)1 and Module Identifier

C

G-9

Wire Number

Alarm - Backup

Component

SENR3828

(Dimensions:39 inches x 24 inches)

Connector Number

Wire Color

Machine Location

Machine Location

20 Page,

Connector Location

Wire Number

Schematic Location

Schematic Location

Component

Harness And Wire Electrical Schematic Symbols

RENR3587-04 May 2012

Wire Description

RENR3587-04 VOL 1 of 2

Component Location (Volume 1)


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