Wire Description Wire Number
Wire Color
101 102 103 105 106 107 108
RD BU YL BR WH WH BU
109 110 111 112 113 114 115 116 117 118 119 120 121
OR GN YL PU OR GN PK BR YL GY PK YL YL
122 123
BU WH
124 125 126 127 128 129 130 131 132 133
GN OR PK OR PK BU GN BR PK OR
134
PK
136 137 138 141 101 102
GN RD GN PK RD BU
200 201 202 203 204
BK BK BK BK BK
205 206 207 212 213 214 215 216 217 218 219 226
BK BK BK BK BK BK BK BK BK BK BK BK
227 231 236 241
BK BK BK BK
242
BK
243
BK
244
BK
301
BU
302
OR
304 306
WH GN
308 310 311
YL PU WH
312
PK
Description Power Circuits BATTERY HEAD LAMP DOME / DASH LAMP / PARK, TAIL LAMP KEY SWITCH MAIN POWER RELAY/INPUT ENGINE SHUT DOWN MISC WIPER, DOME LAMP, CIGAR LIGHTER ALTERNATOR WINDSHIELD WIPER SWITCH (RIGHT) WINDSHIELD WIPER SWITCH (LEFT) MAIN POWER RELAY/OUTPUT OPERATOR MONITOR PANEL WARNING HORN (FORWARD) FLOOD LAMP (FRONT) FLOOD LAMP (REAR) FLOOD LAMP (SIDE) WINDSHIELD WIPER SWITCH (FRONT) WINDSHIELD WIPER SWITCH (REAR) CONVERTER (24 V to 12 V) BACKUP ALARM/LAMP/TRAVEL ALARM TIMER AIR DRYER GAGES (SERVICEMETER, TORQUE CONV SOLENOID) AIR CONDITIONER FUEL TRANSFER PUMP TRANSMISSION CONTROL CAB FLOOD LAMP KICKOUT SOLENOID SWITCH CIGAR LIGHTER STOP LAMP FIRE CONTROL-OPERATOR WARNING ANTISPIN CONTROL PROGRAMMED ELECTRONIC ENG CONT SOLENOID PROGRAMMED ELECTRONIC ENG CONT LOGIC SUPPLEMENTAL STEERING STEERING MOTOR INDICATOR AUTOMATIC LUBE PUMP (TRUCK) AUXILIARY HEATER Bat (+) Hd Lmp Ground Circuits MAIN CHASSIS OPERATOR MONITOR PANEL TRANSMISSION CONTROL CHASSIS DIAGNOSTIC OPERATOR MONITOR PANEL (SCRAPER) INSTRUMENT BATTERY SIDE OF DISCONNECT STARTER DIAGNOSTIC ANTISPIN CODING PIN 16 ANTISPIN CODING PIN 17 ANTISPIN CODING PIN 18 ANTISPIN CODING PIN 19 ANTISPIN CODING PIN 20 TRANSMISSION CODING PIN 17 TRANSMISSION CODING PIN 18 TRANSMISSION CODING PIN 19 OPERATOR MON PANEL SET POINT SELECT TRANSMISSION CODING PIN 37 TRANSMISSION SW TRANSMISSION CODING PIN 36 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 Basic Machine Circuits STARTER NO. 1 SOLENOID TO RESISTOR STARTER NO. 1 TO DIAGNOSTIC! RESISTOR TO DIAGNOSTIC STARTER RELAY NO. 1 OUTPUT STARTER RELAY COIL / NEUTRAL START SWITCH MAIN POWER RELAY COIL ETHER SWITCH TO ETHER SOLENOID ETHER SOLENOID TO TEMPERATURE SWITCH STARTER NO.2 SOLENOID
Wire Number
Wire Color
313
GY
314 321 322 323 324 325
PU BR GY WH BU PK
326 327 328
PU PK RD
400 403 404
GN GN YL
405
GY
406
PU
407
PK
408
WH
409 410
OR WH
411
PK
412
BU
413
BR
414 415 416 417 418
PK GN OR GY YL
419
YL
420
OR
421
BU
422
YL
423
GY
424
GY
425
PK
426
BR
427
GN
428
OR
429
YL
431
GN
432
PK
433
BU
434
BU
435
YL
436
OR
437
BR
438
YL
440 441 442 443 444
BR OR GY YL BU
445
GN
446 449
PU BU
Description Basic Machine Circuits (Continued) STARTER NO. 2 TO DIAGNOSTIC RESISTOR TO DIAGNOSTIC STARTER RELAY NO. 2 OUTPUT BACKUP ALARM / LAMP WARNING HORN (FORWARD) FUEL TRANSFER PUMP POWER DIFFERENTIAL LOCKUP SOLENOID FUEL PUMP RELAY OIL PRESS. SWITCH KEY SWITCH C” TERMINAL SHUTDOWN SOLENOID SHUTDOWN MODULE OFF” Monitoring Circuits Service Meter SWITCH ALTERNATOR (R) TERMINAL OPERATOR MON PANEL HYDRAULIC OIL TEMP OPERATOR MON PANEL OIL PRESSURE OPERATOR MON PANEL COOLANT TEMPERATURE OPERATOR MON PANEL CONV/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 PRESSURE OPERATOR MON PANEL LOW FUEL OPERATOR MON PANEL TEST SWITCH SECONDARY STEERING SWITCH PRIMARY STEERING SWITCH OPERATOR MON PANEL OIL PRESSURE (HIGH SETTING) OPERATOR MON PANEL PARKING BRAKE OPERATOR MON PANEL FUEL FILTER/LOW ACCUM PRESS. OPERATOR MON PANEL FAULT LAMP (SCRAPER) OPERATOR MON WARNING HORN (SCRAPER) OPERATOR MON PANEL TEST SWITCH (SCRAPER) OPERATOR MON PANEL POWER TRAIN TEMPERATURE 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 TEMPERATURE OPERATOR MON PANEL LOW TRANSFER PUMP PRESS. OPERATOR MON PANEL BRAKE PRESSURE (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 AIR PRESS. GAGE ENGINE COOLANT TEMP GAGE HYDRAULIC SYSTEM TEMP GAGE POWER TRAIN TEMP GAGE CONV/RETARDER OIL TEMP GAGE (TRACTOR) CONV / RETARDER OIL TEMP GAGE (SCRAPER) BRAKE OIL TEMPERATURE GAGE SPEEDOMETER SENDER
Wire Number
Wire Color
450 451 452 453 454 455
YL BR PU PK GN YL
500 501 502 503 504 505 506 507 510 513 514
BR GN OR BR YL BU PU WH YL OR PU
515 516 517 519
GY GN BU PK
520
WH
521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536
YL WH BR BU GY YL GN PK WH OR WH WH RD WH BU OR
537 538 539
GR BR BU
540
WH
600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617
BR GY WH PK OR YL GY PK GN YL OR PU GY PK PU YL BU BR
618
YL
619 622 623 624 625
GR PU BU YL BK
702
OR
703 704 705
BU GY PK
706 707 708 709 710 711
BR PU YL OR GN BR
Description Monitoring Circuits (Continued) TACHOMETER SENDER (+) TACHOMETER SENDER (—) TORQUE CONVERTER SECONDARY STEERING FAULT LAMP RETARDER INDICATOR LAMP CONVERTER TEMP SWITCH TO TIME DELAY 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 WINDSHIELD WASHER-PRIMER AIR CONDITIONER COMPRESSOR AIR CONDITIONER CONDENSOR MOTOR BLOWER MOTOR (HIGH) BLOWER MOTOR (MEDIUM) BLOWER MOTOR (LOW) THERMOSTAT TO DRYER PRESSURE SWITCH OPERATOR AIR CONDITIONER SWITCH TO THERMOSTAT AIR COND SW TO RFGT SW AIR COND COMPR TO THERMO SW WINDSHIELD WIPER-LEFT (PARK) 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 SWITCH HEAT SENSOR/TEST SWITCH TRAVEL ALARM TIMER PRESS SWITCH TRAVEL ALARM TIMER MANUAL OVERRIDE TURN SIGNAL SWITCH TO FLASHER HAZARD INDICATOR TURN SIGNAL INDICATOR BASIC / RIGHT TURN SIGNAL INDICATOR LEFT Lighting Circuits DASH BASIC DASH HIGH DOME ROTARY BEACON STOP 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 TAIL/POSITION LAMP-LEFT (ROADING PACKAGE) TAIL/POSITION LAMP-RIGHT (ROADING PACKAGE) HEAD LAMP LOW FLOODLAMP 3 WAY SWITCH JUMPER FLOODLAMP 3 WAY SWITCH JUMPER FLOODLAMP BOWL COURTESY LAMP Control Circuits 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
Wire Number
Wire Color
712 713 714 715 716 720 721 722 723 724 725 726 727 728
WH OR YL GN BU PU BR WH OR YL GN BU GN BU
733 734 735 736 737 738 739 740 741 742 743 744 745 746 747
BR WH OR YL GN BR WH OR YL GN PU BU GY PK WH
756
WH
761 762
GY YL
763 764
BU PU
765 767 768 769 770 771 772 773 774 775
OR WH OR BU GN PU BR GY YL BR
Description Control Circuits (Continued) TRANSMISSION LEVER CODE 2 TRANSMISSION LEVER CODE 3 TRANSMISSION LEVER CODE 4 TRANSMISSION LEVER CODE 5 TRANSMISSION LEVER CODE 6 TRANSMISSION BRAKE SWITCH 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 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 SWITCH SWITCHING UP SOLENOID SWITCHING DOWN SOLENOID SWITCHING SYNCHRONIZE SOLENOID SWITCHING NO SYNCHRONIZE SOLENOID TRANSMISSION LOCKUP CLUTCH SOLENOID LIFT KICKOUT SOLENOID SWITCH BUCKET POSITIONER SOLENOID SWITCH TORQUE CONVERTER SOLENOID SUPPLEMENTAL STEERING CONTROL SWITCH (MOTOR GRADER) APRON SOLENOID (SCRAPER) ANTISPIN PICKUP POWER ANTISPIN PICKUP TRANSMISSION ANTISPIN PICKUP LEFT ANTISPIN PICKUP RIGHT ANTISPIN SERVICE BRAKE SWITCH ANTISPIN RETARDER SWITCH ANTISPIN SERVOVALVE ANTISPIN SOLENOID - LEFT ANTISPIN SOLENOID - RIGHT
SENR3019 January 1984
Power Train Electrical System for Off Highway Tractors and Trucks with Electronic Power Shift Transmission Control System for ICM For use in Service Manuals: 776 Tractor & 777 Truck, SENR2965 772B Tractor & 773B Truck SENR2950 768C Tractor & 769C Truck, SENR2930
© 1984 Caterpillar
All Rights Reserved
Printed in U.S.A.