Wire Description Wire Number
Wire Color
Wire Number
Wire Color
101
RD
BAT
432
PK
102
OPR MON BRAKE PRESS. (OIL)
BU
HD LMP
433
BU
OPR MON BRAKE PRESS. (OIL) JUMPER
105
BR
KEY SW
440
BR
AIR PRESS. GAGE
109
OR
AL T OUTPUT (+) TERM.
441
OR
ENG COOLANT TEMP GAGE
Description
Monitoring Circuits (Continued)
Power Circuits
3 29
12
10
7 2
1
10
24
13 20
E
9
2
HYD SYSTEM TEMP GAGE
YL
POWER TRAIN TEMP GAGE
WARNING HORN (FORWARD)
447
PK
FUEL LEVEL GAGE
450
YL
TACH SENDER (+)
5
118
GY
AUX CKT
496
WH
OPR MON PANEL HYD OIL LEVEL
11
120
YL
AUX CKT
A401
YL
ELECTRICAL SYSTEM NO.1 VOLTAGE
121
YL
BACKUP ALARM TO LAMP
A475
PU
124
GN
A/C
127
OR
AUX CKT
500
BR
WIPER - FRONT (PARK)
128
PK
AUX CKT
501
GN
WIPER - FRONT (LO)
26
12
14
C
F
9
30 B
23
4
6
28
5
GY
443
AUX CKT
21 27 16 13
15 6
3
442
OPR MON PANEL VMIS B+ SWITCHED
BR
A
1
MAIN POWER RELAY OUTPUT
OR GN
22 17 18
PU
113 114
D
7
112
116
11
4
19
8
25 14
129
BU
AUX CKT
502
OR
WIPER - FRONT (HI)
130
GN
AUX CKT
503
BR
WIPER - REAR (PARK) WIPER - REAR (LO)
158
BR
AUX CKT
504
YL
177
OR
MAIN BKR
505
BU
WIPER - REAR (HI)
193
PU
AUX CKT
506
PU
WASHER - FRONT
507
WH
WASHER - REAR
200
BK
MAIN CHASSIS
508
PU
RADIO SPEAKER - LEFT
201
BK
OPR MON PANEL VMIS CMS
509
WH
RADIO SPEAKER - LEFT (COMMON)
203
BK
CHASSIS DIAGNOSTIC
511
BR
RADIO SPEAKER - RIGHT
207
BK
STARTER DIAGNOSTIC
512
GN
RADIO SPEAKER - RIGHT (COMMON)
270
BK
CMS IDENT CODE 0
513
OR
271
BK
CMS IDENT CODE 1
514
PU
A/C COMPRESSOR/REFRIGERANT PRESS. SW A/C CONDENSER MOTOR
272
BK
CMS IDENT CODE 2
515
GY
BLOWER MOTOR (HI)
273
BK
CMS IDENT CODE 3
516
GN
BLOWER MOTOR (MEDIUM)
274
BK
CMS IDENT CODE 4
517
BU
BLOWER MOTOR (LO)
275
BK
CMS IDENT CODE 5
521
YL
A/C SW TO REFRIGERANT SW
290
BK
CMS SERVICE
522
WH
A/C CLUTCH TO THERMOSTAT SW
291
BK
CMS CLEAR
537
GN
TURN SIGNAL SW TO FLASHER
292
BK
CMS US/METRIC-UNITS Basic Machine Circuits
A
10 20 1 22 6
2
17 18 2
9 24
5 7
13
10
29
4
STARTER NO.1 RESISTOR TO DIAGNOSTIC
603
PK
ROTARY BEACON
STARTER RELAY NO.1 OUTPUT
604
OR
STOP LAMP
14
306
GN
605
YL
TURN LAMP - LEFT
23 9
8
30 19
308
YL
STARTER RELAY COIL TO NEUT START SW OR KEY SW MAIN POWER RELAY COIL
606
GY
TURN LAMP - RIGHT
310
PU
START AID SW TO START AID SOL
608
GN
FLOOD LAMP - REAR
311
WH
START AID SOL TO TEMP SW
610
OR
HEAD LAMP BASIC HEAD LAMP HI
321
BR
BCKP ALARM LAMP TRAVEL ALARM
611
PU
322
GY
WARNING HORN (FORWARD)
614
PU
PARK/TAIL/DASH LAMP
326
PU
KEY SW "C" TERM.
615
YL
CAB FLOOD LAMP/ROPS
Monitoring Circuits
617
BR
619
GN
16 25 14
Vehicle Harness Connector And Component Locations
403
GN
ALTERNATOR (R) TERM.
405
GY
OPR MON OIL PRESS. (LO SETTING)
Alarm - Backup
Machine Location 1
Alarm - Backup
F-12
1
Alarm - Fault
E-3
Alternator
E-10
Machine Location 16
Solenoid - A/C Clutch
A-12
17
C
Solenoid - Bucket Float
B-5
F
2
Solenoid - Bucket Kickout
B-5
F
Component Sensor - Trans Output Speed
Battery
E-11
3
Solenoid - Engine Shutdown
A-12
18
F-11
4
Solenoid - Lift Kickout
B-4
F
Breaker - Alternator
C-12
E
Solenoid - Ride Control
A-1
19
Breaker - Blower Motors
B-5
F
Solenoid - Ride Control (German Roading)
D-1
19
Breaker - Condenser Fan Motors
C-5
F
Solenoid - Start Aid
A-11
20
Breaker - Main
C-12
E
Switch - Backup Alarm
B-1
21
409
OR
OPR MON NEUT
710
GN
XMSN SPEED PICKUP SIGNAL
WH
OPR MON FAULT ALARM
761
GY
LIFT KICKOUT SOL SW
411
PK
OPR MON MASTER FAULT LAMP
762
YL
BUCKET POSITIONER SOL SW
416
OR
SUPPL STER SW
944
OR
CMS COMM +
417
GY
PRIMARY STER SW
945
BR
CMS COMM -
419
YL
OPR MON PARKING BRAKE
976
OR
RIDE CONT SOL
429
YL
OPR MON BRAKE OIL TEMP
Breaker - Running Lamp
Part No. 2M9346
Function Stoplamp Pressure
448 ± 35kPa (65 ± 5 psi)
*
9X1 159
Steering (Primary-Secondary) Flow (CMS)
4 grams (.14 oz.)
1.5 grams (.05 oz)
N.O.
9X3210
Parking Brake Pressure (CMS)
517 ± 35kPa (75.0 ± 5.0 psi)
448 ± 35kPa (65.0 ± 5.0 psi)
N.O.
9X4276
Engine Oil Pressure (CMS)
93.0 ± 20.8 kPa (14.0 ± 3.0 psi)
68.9 ± 20.8 kPa (10.0 ± 3.0 psi)
*
A
* = Pins 1-2 N.O.; Pins 1-3 N.C.
F-7
D
N.O. = NORMALLY OPEN
Converter - Voltage
F-4
A
Switch - Brake Oil
A-10
22
N.C. = NORMALLY CLOSED
Dryer - Brake Air
A-10
6
Switch - Brake Oil
A-11
22
Flasher
C-5
A
Switch - Bucket Positioner
Fuse - Holder
B-4
F
Fuse - Holder
C-12
E
Switch - Bucket Positioner (German Roading) Switch - Dimmer
Ground - Engine To Frame
E-11
7
Switch - Disconnect
Ground - Platform (Cab)
A-7
F
Ground - Platform (Cab) To Frame
A-7
8
Horn - Forward (German Roading)
D-1
9
Switch - Flood Lamp
A
F-11
7
1
A - 8R8159 B - 8R9204
B-8
4
B - 8R9204 L - 8R7067
A-3
Switch - Engine Oil Press
A-12
24
Switch - Ether Aid Coolant Temp
E-11
2
*
E-4
4
B - 8R9204 L - 8R7067
C-3
E-6
C
B - 8R9204 Computerized Monitoring System
20 Contacts
2
A - 8R8159 Diagnostic Connector
B-12
13
F - 8R8164 Z - 8R81 69
D-2
12 Contacts
1
A - 8R8159 B - 8R9204
B-8
14
B - 8R9204 JJ - 8R7202
D-5
3
A - 8R8159 F - 8R8164
F-6
*
Z - 8R8169 Flasher
C-5
4
B - 8R9204 L - 8R7Q67
D-3
6
B - 8R9204 P - 8R71 99
D-6
5
B - 8R9204 M - 8R9296
B-5
8
E - 8R8165 G - 8R81 66
A-2
6
B - 8R9204 P - 8R7199
D-6
14
B - 8R9204 Service Mode Plug
D-5
7
R - 8R9203 S - 8R8117
4
B - 8R9204 Front Wiper Motor
E-3
12
E - 8R8165 NN - 6W8227
B-2
*
G - 8R8166 Rear Wiper Motor
Connector
B
Meter - Service
E-7
D
Switch - Horn
D-2
A
Monitor - Computerized System (CMS)
E-4
B
Switch - Hydraulic Oil Level
A-2
Motor - Blower
D-8
F
Switch - Key Start
D-6
C
Motor - Blower
E-8
A
Switch - Lift Positioner
A-1
26
Motor - Front Washer
C-10
10
Switch - Lift Positioner (German Roading)
D-1
26
Motor - Front Wiper
E-3
B
Switch - Parking Brake
C-1
27
25
C-10
10
Switch - Primary Steering Flow
B-11
28
Motor - Rear Wiper
E-6
A
Switch - Primary Steering Flow (German Roading)
B-11
28
Motor - Starter
F-11
7
Switch - Rear Wiper
D-3
B
Motors - Condenser Fan
A-5
F
Switch - Refrigerant
A-7
F
Receptacle - Auxiliary Start
F-11
7
Switch - Ride Control
C-3
B
Relay - Condenser Fan
A-6
F
Switch - Running Lamp
D-6
C
Relay - Main
C-12
E
Switch - Secondary Brake Air Press
F-8
29
Relay - Start
C-12
E
Switch - Start Aid
D-6
C
Resistor - Blower Speed
D-8
A
Switch - Stoplamp Press
B-2
30
B-11
27
E-7
D
E
Resistor - Starting System Diagnostics
F-10
7
Switch - Thermostat
Pin or Socket Number
Flow Symbol
C
Harness Connector Location Chart
D-3
C-11
Level Symbol
Sender - Fuel Level
B-1
11
Switch - Trans Neutral
B-1
21
Sensor - Brake Air Pressure
C-1
12
Switch - Turn Signal
C-5
A
Sensor - Coolant Temp
E-11
2
40 Contacts
Harness And/Or Components
Schematic Location
Connector
Machine Location
Harness And/Or Components
Schematic Location
6 Contacts
F-7
A
A 325-PK-14
Normally open switch that will close with an increase of a specific condition (temp-press-etc.). Pin
AA 1
9X-1123 325-PK-14
Wire Color
Socket
Normally open switch that is closed due to an applied condition, and will open again with a specific decrease in that condition. 2
7 Contacts
5 Contacts 10 Contacts
200-BK-14
Circuit Number Identification
Normally closed switch that will open with an increase of a specific condition.
Wire Gauge
Electrical Schematic Symbols And Definitions
Normally closed switch that is open due to an applied condition, and will close again with a specific decrease in that condition.
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.
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.
No circle indicates that the wire cannot be disconnected from the component.
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.
4 Contacts
3
A - 8R8159 F - 8R8164
8
F - 8R8164 G - 8R8166
F-2
9
A - 8R8159 C - 8R8163
A-11
10
A - 8R8159 D - 8R8162
E-10
11
A - 8R8159 E - 8R8165
A-6
12
A - 8R8159 H - 8R8185
D-12
4
B - 8R9204 Q - 8R6083
C-4
5
B - 8R9204 A - 8R92035
D-8
*
T - 8R6082 Radio
E-6
F-6
9 Contacts
8 Contacts
Vehicle locations are repeated for components located close together. D = Components in operator compartment - Left console
Component Part Number
Single Wire Connector
F-2
Resistor - Monitor System Voltage (CMS)
Temperature Symbol
Typical representation of a Sure-Seal connector. The plug and receptacle contain both pins and sockets.
Wire, Cable, or Harness Assembly Identification
Machine Location
Switch - Front Wiper
A = Components in operator compartment.
Pressure Symbol
23
B
Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.
2 T
1 2
1 2
Receptacle
Plug
23
Switch - Supplemental Steering Flow (German Roading)
AA 1
Electrical Schematic Symbols And Definitions
A-1
B-3
15
A
D-1
Lamp - Master Warning (CMS)
A-11
N.O.
517 ± 35kPa (75 ± 5 psi)
C-3
Sensor - Trans Oil Temp
5 kPa MIN (0.5 psi MIN)
Secondary Brake Air Pressure (CMS)
Switch - Beacon
13
45 kPa MAX (6.5 psi MAX)
8T9792
Switch - Blower
14
Contact Position
N.C.
5
A-2
Deactuate
26.7°C Min (81°F Min)
E
A-11
Actuate
37.8 ± 2.8°C (100 ± 5°F)
B-2
Sensor - Engine Speed
Harness And Wire Electrical Schematic Symbols
Coolant Temperature Switch (Ether Aid)
C-12
Printed in U.S.A.
© 2010 Caterpillar All Rights Reserved
8C3569
Buffer - Fuel Level
Sensor - Hydraulic Temp
Control Circuits
Off Machine Switch Specification Schematic Location B-1
Battery
Motor - Rear Washer
TAIL/POSITION LAMP - LEFT (ROAD PKG)/WIDTH HEAD LAMP LO
410
Component Location Schematic Location D-12
Component
Lighting Circuits
OR
12
15
HAZARD INDICATOR DC/DC CONVERTER POWER OUTPUT
WH
7 3
BR BU
304
6
8
STARTER NO.1 SOL
538
302
12 27
28 11 5
BU
950F Wheel Loader Electrical System 7ZF1-UP 6YG1-UP 4DJ1-UP
592
4 B
F
3
1 12
301
C
D
OPR MON PANEL SECONDARY BRK PRESS (TUV ONLY) Accessory Circuits
Ground Circuits
E
SENR4935-01 October 2010
Description
B = Components in operator compartment - Dash.
E = Components on relay panel.
Vehicle locations are repeated for connectors located close together.
C = Components in operator compartment - Right console.
F = Components in service compartment - Right Side.
* = Connector is located at component.
E-6
T
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.
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.