Wire Description Chart Wire Number
Wire Color
Description
Wire Number
Wire Color
Monitoring Circuits (Continued)
Power Circuits
Component Location Schematic Location
Machine Location
Alarm (CMS)
D-4
A
Alarm - Backup
D-15
5
Alternator 3 7
22
5
12
2
1
4
11 9
19
16
25
13
21
14
24
18 17
6 2
10
D
23
20
28
6 29
3
B
26
A
1 27 C
7 4
8
15
8
A 11 9 B
10
7 21
C
6
5
14
24
26
1 29
3
2
3
25
27
19
22
23
8
13
6
5
7
1
D
28 16
12
18
8
2
4
17
4
20
F - 1034729 P - 1027526
E-5
*
F - 1034729 Monitor (CMS)
E-4
*
P - 1027526 Trans Control
D-1 2
1
A - 1036029 P - 1027526
1
A - 1036029 P - 1027526
24 Contacts
B-7
1
E - 1036030 P - 1027526
B-11
B
A - 1036029 Diaqnostic Conn
B-15
*
RR - 1034735 Payload Control
F-12
2
B - 8E6402 E - 1036030
C
9 Contacts
WTL PMS CLEAR / CHG OUT
B416
WH
WTL PMS REWEIGH SW IN
1
Shifter - Transmission
F-3
A
112
PU
MAIN POWER RELAY OUTPUT
B417
YL
WTL PMS STORE SW IN
E-13
2
Solenoid - A/C Clutch
A-15
19
113
OR
OPR MON PANEL VMIS B+ SWITCHED
Battery
F-14
3
Solenoid - Engine Shutdown
B-15
C
114
GN
WARNING HORN (FORWARD)
500
BR
WIPER - FRONT (PARK)
116
BR
AUX CKT
501
GN
WIPER - FRONT (LO)
Battery
F-14
4
Solenoid - Float Detent
B-6
C
118
GY
AUX CKT
502
OR
WIPER - FRONT (HI)
Breaker - Alternator (80A)
C-15
B
Solenoid - Lift Detent
B-5
C
120
YL
AUX CKT
503
BR
WIPER - REAR (PARK)
Breaker - Blower Motors (15A)
C-10
C
Solenoid - Ride Control Valve
B-1, E-1
20
121
YL
BACKUP ALARM TO LAMP
504
YL
WIPER - REAR (LO)
Breaker - Main (80A)
C-15
B
Solenoid - Start Aid
A-14
21
124
GN
A/C
505
BU
WIPER - REAR (HI)
126
PK
XMSN CONT
506
PU
WASHER - FRONT
Breaker - Running Lamp (15A)
C-15
B
Solenoid - Tilt Detent
B-6
C
127
OR
AUX CKT
507
WH
WASHER - REAR
Breaker - Seat Air Comp (15A)
C-10
C
Solenoids - Trans Valves (6)
C-11, C-12
18
128
PK
AUX CKT
508
PU
RADIO SPEAKER - LEFT
Buffer - Fuel Level
D-1
5
Switch - Auto Ride Control
E-7
C
129
BU
AUX CKT
509
WH
RADIO SPEAKER - LEFT (COMMON)
Control - Autoshift Trans
E-12
6
Switch - Battery Disconnect
F-14
22
130
GN
AUX CKT
511
BR
RADIO SPEAKER - RIGHT
135
BU
AUX CKT
512
GN
RADIO SPEAKER - RIGHT (COMMON)
Control - Payload Measurement (ECM)
F-12
6
Switch - Beacon
D-10
C
138
GN
AUTO LUBE PUMP TO PAYLOAD MON
513
OR
A/C COMPRESSOR/REFRIGERANT PRESS. SW
Converter - Voltage
E-6
A
Switch - Blower Motor
D-4
D
144
GN
AUX CKT
515
GY
BLOWER MOTOR (HI)
Display - Payload Operator
D-3
D
Switch - Brake Oil
A-13
21
164
WH
HYDRO CONT TO WTL POWERTRAIN CTRL
516
GN
BLOWER MOTOR (MEDIUM)
7
21
MAIN BKR
517
BU
BLOWER MOTOR (LO)
Switch - Brake Oil
A-14
OR
Dryer - Brake Air
A-13
177 193
PU
AUX CKT
521
YL
A/C SW TO REFRIGERANT SW
Flasher
D-4
D
Switch - Bucket Positioner
A-1, E-1
23
522
WH
A/C CLUTCH TO THERMOSTAT SW
Flasher (Roading)
F-4
D
Switch - Coolant (Ether Aid)
E-13
2
Fuses (10A)
C-10
C
Switch - Dimmer
C-1
A
Fuses (10A)
C-15
B
Switch - Engine Oil
A-15
24
Accessory Circuits
Ground Circuits 200
BK
MAIN CHASSIS
537
GN
TURN SIGNAL SW TO FLASHER
201
BK
OPR MON PANEL CMS
538
BR
HAZARD INDICATOR
202
BK
XMSN CONT
203
BK
CHASSIS DIAGNOSTIC
603
PK
ROTARY BEACON
Lighting Circuits
Horn - Forward
B-1, F-1
8
Switch - Flood Lamp
E-11
C
206
BK
BAT SIDE OF DISCONNECT
604
OR
STOP LAMP
Lamp - Action
D-4
D
Switch - Front Intermittent Wiper
E-8
C
207
BK
STARTER DIAGNOSTIC
605
YL
TURN LAMP - LEFT
Meter - Service
E-11
C
Switch - Hydraulic Oil Level
A-3
15
228
BK
FUEL LEVEL SENDER
606
GY
TURN LAMP - RIGHT
250
BK
PAYLOAD MON - CUSTOMER GROUND
608
GN
FLOOD LAMP - REAR
Monitor - Computerized System (CMS)
E-4
D
Switch - Key Start
E-9
C
251
BK
PAYLOAD MON - SYSTEM GROUND
610
OR
HEAD LAMP BASIC
Motor - Front Washer
B-13
9
Switch - Lift Positioner
A-2, E-1
25
270
BK
CMS IDENT CODE 0
611
PU
HEAD LAMP HI
Motor - Front Wiper
B-3
10
Switch - Payload Measurement Reweigh
E-7
C
271
BK
CMS IDENT CODE 1
614
PU
PARK/TAIL/DASH LAMP
Motor - Rear Washer
B-14
9
Switch - Payload Measurement Store
E-7
C
272
BK
CMS IDENT CODE 2
615
YL
CAB FLOOD LAMP/ROPS
273
BK
CMS IDENT CODE 3
617
BR
TAIL/POSITION LAMP - LEFT (ROAD PKG)/WIDTH
Motor - Rear Wiper
F-10
11
Switch - Parking Brake Press
D-2
26
274
BK
CMS IDENT CODE 4
619
GN
HEAD LAMP LO
Motor - Starter
F-14
12
Switch - Rear Wiper
E-8
C
275
BK
CMS IDENT CODE 5
Motors - Blower
C-3
A
Switch - Refrigerant (A/C)
A-15
27
276
BK
XMSN CONT IDENT CODE 0
710
GN
XMSN SPEED PICKUP SIGNAL
Relay - Main
C-15
B
Switch - Running Lamp
E-10
C
277
BK
XMSN CONT IDENT CODE 1
720
PU
XMSN BRAKE SW
278
BK
XMSN CONT IDENT CODE 2
751
GN
XMSN SHIFT SOL NO.1 OR 3
Relay - Start
C-15
B
Switch - Start Aid
E-8
C
279
BK
XMSN CONT IDENT CODE 3
752
YL
XMSN SHIFT SOL NO.2
Resistor - Blower Motor Speed
C-3
A
Switch - Stoplamp Press
C-1
28
280
BK
XMSN CONT IDENT CODE 4
754
BU
XMSN SHIFT SOL NO.3 OR 1
Resistor - System Voltage (CMS)
C-14
B
Switch - Supplemental Steering Flow
B-14
26
281
BK
XMSN CONT IDENT CODE 5
755
OR
XMSN SHIFT SOL NO.4 OR 5
Sender - Fuel Level
D-1
5
Switch - Trans Auto/Manual
D-11
C
290
BK
SERVICE
761
GY
LIFT KICKOUT SOL SW
291
BK
CLEAR
762
YL
BUCKET POSITIONER SOL SW
Sensor - Brake Air Press
D-2
13
Switch - Trans Downshift
B-6
C
292
BK
CMS US/METRIC UNITS
795
YL
DUAL HP SOL
Sensor - Coolant Temp
E-14
2
Switch - Trans Neutralizer
C-1
28
A221
BK
TRANS CONTROL OPTIONS CODE 0
D743
GN
RIDE CONT - WTL IMPL CONT SW TO GND N/O
Sensor - Engine Speed
C-13
14
Switch - Trans Neutralizer Override
E-6
C
A222
BK
TRANS CONTROL OPTIONS CODE 1
D744
WH
RIDE CONT - WTL IMPL CONT SW TO GND N/C
15
A
AUTO RIDE CONTROL SW
Switch - Turn Signal
D-6
PK
Sensor - Hydraulic Temp
A-3
E701
301
BU
STARTER NO.1 SOL
E702
OR
AUTO RIDE CONTROL SW
A-2, E-1
16
Switches - Primary Steering Flow
B-14
29
302
OR
STARTER NO.1 RESISTOR TO DIAGNOSTIC
818
BR
SERIAL DATA (TRANSMIT)
304
WH
STARTER RELAY NO.1 OUTPUT
819
GY
SERIAL DATA (RECEIVE)
306
GN
STARTER RELAY COIL TO NEUT START SW OR KEY SW
820
BU
TRANSMIT KEY
307
OR
KEY SW TO NEUT START SW OR VMIS SENSOR MODULE
863
BU
PAYLOAD MON TRANSMIT LCD OUT
308
YL
MAIN POWER RELAY COIL
864
BR
PAYLOAD MON CLOCK LCD OUT
310
PU
START AID SW TO START AID SOL
865
GY
PAYLOAD MON LATCH LCD OUT
311
WH
START AID SOL TO TEMP SW
900
PU
XMSN SHIFT SOL NO.5 OR 4
321
BR
BCKP ALARM LAMP TRAVEL ALARM
901
WH
XMSN SHIFT SOL NO.6
322
GY
WARNING HORN (FORWARD)
910
YL
326
PU
KEY SW "C" TERM.
921
WH
XMSN SOL NO 1 OR 3 RETURN
922
BR
XMSN SOL NO 2 RETURN
B-14
17
Control Circuits
Basic Machine Circuits
Monitoring Circuits
Part No.
Off Machine Switch Specification Actuate
Deactuate
Stoplamp Pressure
45.0 kPa MAX (6.5 psi MAX)
5.0 kPa MIN (0.5 psi MIN)
Normally Open
Engine Coolant Temp (St Aid)
37.8 ± 2.8°C (100.0 ± 5.0°F)
26.7°C MIN (81.0°F MIN)
Normally Closed
8T-9792
Secondary Brake Air Pressure
517.0 ± 35.0 kPa (75.0 ± 5.0 psi)
448.0 ± 35.0 kPa (65.0 ± 5.0 psi)
Pins 1-2 (N.O.) Pins 1-3 (N.C.)
9X-1159
Steering (Primary & Supplemental) Flow
4.0 Grams (.14 oz)
1.5 Grams (.05 oz)
Normally Open
9X-4276
Engine Oil Pressure
93.0 ± 20.8 kPa (13.5 ± 3.0 psi)
69.0 ± 21.0 kPa (10.0 ± 3.0 psi)
Pins 1-2 (N.O.) Pins 1-3 (N.C.)
9X-9418
Transmission Neutralizer
103.0 ± 20.0 kPa (15.0 ± 3.0 psi)
69.0 kPa MIN (10.0 psi MIN)
Normally Closed
2M-9346
Function
4DJ2000-UP 5SK1-UP
8TK1-UP
XMSN NEUTIZER OVERRIDE INDICATOR
403
GN
ALTERNATOR (R) TERM.
923
GY
XMSN SOL NO 3 OR 1 RETURN
405
GY
OPR MON OIL PRESS. (LO SETTING)
924
GN
XMSN SOL NO 4 OR 5 RETURN
409
OR
OPR MON NEUT
925
YL
XMSN SOL NO 5 OR 4 RETURN
410
WH
OPR MON ACTION ALARM
926
BU
XMSN SOL NO 6 RETURN
411
PK
OPR MON MASTER ACTION LAMP
944
OR
CMS COMM +
416
OR
SUPPL STER SW
945
BR
CMSCOMM -
417
GY
PRIMARY STER SW
965
WH
TRANS SOL 1 SW TO GND
419
YL
OPR MON PARKING BRAKE
966
GY
TRANS SOL 3 SW TO GND
429
YL
OPR MON BRAKE OIL TEMP
968
BR
TRANS SOL 2 SW TO GND
432
PK
OPR MON BRAKE PRESS. (OIL)
969
YL
TRANS SOL 3 SW TO B+
433
BU
OPR MON BRAKE PRESS. (OIL) JUMPER
970
GN
TRANS SOL 4 SW TO GND
439
YL
LAMP INDICATOR
971
YL
TRANS SOL 5 SW TO GND
440
BR
AIR PRESS. GAGE
972
BU
TRANS SOL 6 SW TO GND
441
OR
ENG COOLANT TEMP GAGE
973
BR
CST AUTOSHIFT - AUTO/MANUAL SW 2
442
GY
HYD SYSTEM TEMP GAGE
974
PU
CST AUTOSHIFT - SLOW MODE SW
443
YL
POWER TRAIN TEMP GAGE
975
WH
CST AUTOSHIFT - SOL RETURN
447
PK
FUEL LEVEL GAGE
976
OR
RIDE CONT SOL
450
YL
TACH SENDER (+)
977
YL
CST AUTOSHIFT - AUTO/MANUAL SW 1
469
GN
FUEL LEVEL SENDER B+
978
GN
CST AUTOSHIFT - SLOW MODE SW 1
496
WH
OPR MON PANEL HYD OIL LEVEL
B999
GN
TRANS SOL 1 SW TO B+ (LRT ONLY)
C
D-7
C
P - 1027526 RR - 1034735
B-8
*
A - 1036029 Valve Solenoids
B-6
6
A - 1036029 U - 9U4370
D-2
C-12
*
RR - 1034735 Payload Display
D-3
L - 1027527 P - 1027526
C-10
8
A - 1036029 R - 9U2771
A-3
Part No.
C
L - 1027527 P - 1027526
D-10
D
F - 1034729 Speed Code Conn
F-5
9G-1950
Resistor - Blower Speed
3
N - 9U2810 Std P - 1027526
F-10
*
N - 9U2810 Std Rear Wiper Motor
F-10
6T-2217
Resistor - Starter/Diagnostic Conn
150.0 ± 7.5
3
N - 9U2811 Atch P - 1027526
F-10, D-11
*
P - 1027526 Frt Wiper Motor
B-3
8T8813
Sotenoid - A/C Clutch
14.4 ± 0.6
C
P - 1027526 T - 1027528
D-7
9X-6800
Solenoid - Dual Horsepower
21.7 ± 2.2
C
P - 1027526 T - 1027529
D-8
8C-3663
Solenoid - Engine Shutdown
1.55 ± 0.15
4
A - 1036029 G - 9U4559 Std
B-3
6T-5859
Solenoid - Ride Control
33.7 ± 1.0
4
A - 1036029 G - 1009283 Atch
9G-4365
Solenoid - Start Aid
6.0
*
P - 1027526 Trans Shifter
E-3
3E-3748
Solenoids - Transmission
8.5
5
A - 1036029 C - 9U2763
A-15
4
A - 1036029 G - 9U4559 Std
4
A - 1036029 G - 1009283 Atch
6
A - 1006029 Q - 9U2767
7
A - 1036029 H - 9U4371 Std
D-15
7
A - 1036029 H - 1028960 Atch
F-15
*
P - 1027526 Trans Shifter
Resistor, Sender and Solenoid Specifications Component Description
Component Identifiers (CID)
CID
Component
096 100 110 168 177 190 248 270 271 324 362 600 601 621 627 631 632 633 634 635 636 650 668 671 680 685 687 688
Resistance (Ohms)¹ Overall 2.00 ± .10 Tap 1.00 ± .05
A
Fuel Level Sensor Engine Oil Pressure Sensor Engine Coolant Temperature Sensor Electrical System Voltage Power Train Oil Temperature Sensor Engine Speed Sensor Data link Harness Code Action Alarm Action Lamp Ride Control Solenoid Hydraulic Oil Temperature Sensor Brake Air Pressure Sensor Down Shift Switch Parking Brake Switch Solenoid 1 (Reverse) Solenoid 2 (Forward) Solenoid 3 (Gear 4) Solenoid 4 (Gear 3) Solenoid 5 (Gear 2) Solenoid 6 (Gear 1) Harness Code Shift Handle Transmission Speed Sensor Ride Control Switch Service Information Code Options Identification Code Dual Horsepower Solenoid
Pressure Symbol
Temperature Symbol
Level Symbol
Flow Symbol
MID No. 26 81
Form Number SENR4130
Consist No. 100-5046
SENR2082
Computerized Monitoring System (CMS)
SENR5247
Electronic Transmission Control
SENR5922
Payload Measurement System (PMS)
SEHS9307
Starting And Charging Systems
SENR2947
Starting Motor: (9X-9995) Consist No. 3E-2298
SENR3581
Consist No. 8C-4773
SENR3859
Typical representation of a Sure-Seal connector. The plugand receptacle contain both pins and sockets.
Wire, Cable, or Harness Assembly Identification
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.
C
A
A 325-PK-14
Pin
AA 1
2
Normally closed switch that is open due to an applied condition, and will close again with a specific decrease in that condition.
9X-1123 325-PK-14
Wire Color
Socket
Normally closed switch that will open with an increase of a specific condition.
200-BK-14
Circuit Number Identification
The circle indicates that the component has screw terminals and a wire can be disconnected from it.
Module Identifiers (MID)
Wire Gauge
Electrical Schematic Symbols And Definitions
No circle indicates that the wire cannot be disconnected from the component.
FMI No.
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.
Module
Computerized Monitoring System (CMS) Electronic Transmission Control
Related Electrical Service Manuals
Consist No. 100-5045
2
Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
This indicates that the component has a wire connected to it that is connected to ground.
Alternator (100-5047):
Typical representation of a Deutsch connector. The plug contains all sockets and the receptacle contains all pins.
Receptacle
Plug
1 2
1 2
Pin or Socket Number
A-3, E-2
E-3
AA
FUSE - A component in an electrical circuit that will open the circuit if too much current flows through it.
¹ At room temperature unless otherwise noted.
Title
Harness And Wire Electrical Schematic Symbols
Electrical Schematic Symbols And Definitions
T
A-3
C-2
Printed in U.S.A.
© 1992 Caterpillar All Rights Reserved
Contact Position
P - 1027526 T - 1027528
8C-3569
950F Series II Wheel Loader Electrical System
1
D-3
Machine locations are repeated for connectors located close together. * = Connector is located at the component. B = Connector is located on the relay panel. C = Connector is located in the right console. D = Connector is located in the dash area.
WTL PMS LIFT CYL PRESS. SENSOR
ALT OUTPUT (+) TERM.
RR - 1034735 Payload Display
B-3, F-2
WTL PMS LIFT POS SENSOR
PU
OR
*
4 Contacts
YL
B413
109
F-5
5 Contacts
B412
AUX CKT
18
F - 1034729 Harness Code
6 Contacts
AUX CKT
YL
C-13
D
B-4
YL
104
Sensor - Trans Speed
E-8
7 Contacts
103
WTL PMS NORM/CALIBRATE OUT
P - 1027526 Frt Wiper Switch
5
8 Contacts
OPR MON PANEL SECONDARY BRK PRESS (TUV ONLY)
PK
*
12 Contacts
10 Contacts
Schematic Location
PU
B415
E-13
20 Contacts
14 Contacts
Harness And/Or Components
A475
AUX CKT
A - 1036029 D-9U2764
D
40 Contacts
Machine Location
HD LMP
BU
Machine Harness Connector and Component Locations
Connector
BU
108
Component
D = Components located in dash.
Schematic Location
102
OR
C = Components located in right console.
Harness And/Or Components
ELECTRICAL SYSTEM NO.1 VOLTAGE
B414
B = Components located in relay panel.
Machine Location
YL
KEY SW
A = Components located in operator's compartment.
Connector
A401
BR
Machine locations are repeated for components located close together.
HARNESS CONNECTOR LOCATION CHART
BAT
105
Sensor - Trans Oil Temp
C48644P1
RD
Machine Location
Sensor - Lift Cyl Press
15
101
Schematic Location
Component
SENR5919 December 1992
Description
Failure Mode Identifiers (FMI)¹ Failure Description
0
Data valid but above normal operational range.
1
Data valid but below normal operational range.
2
Data erratic, intermittent, or incorrect.
3
Voltage above normal or shorted high.
4
Voltage below normal or shorted low.
5
Current below normal or open circuit.
6
Current above normal or grounded circuit.
7
Mechanical system not responding properly.
8
Abnormal frequency, pulse width, or period.
9
Abnormal update.
10
Abnormal rate of change.
11
Failure mode not identifiable.
12
Bad device or component.
13
Out of calibration.
This indicates that the component does not have a wire connected to ground. It is grounded by being fastened to the machine.
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. 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.