SENR3019
January 1984
For use in Service Manuals:
776 Tractor & 777 Truck, SENR2965
772B Tractor & 773B Truck SENR2950
768C Tractor & 769C Truck, SENR2930
Electronic Power Shift Transmission
Off Highway Tractors and Trucks with
Power Train Electrical System for
Control System for ICM
©
1984 Caterpillar
All Rights Reserved
Printed in U.S.A.
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Circuits
Basic Machine Circuits (Continued)
Monitoring Circuits (Continued) Control Circuits (Continued)
101 RD BATTERY 313 GY STARTER NO. 2 TO 450 YL TACHOMETER SENDER (+) 712 WH TRANSMISSION LEVER CODE 2
102 BU HEAD LAMP DIAGNOSTIC RESISTOR TO 451 BR TACHOMETER SENDER (—) 713 OR TRANSMISSION LEVER CODE 3
103 YL DOME / DASH LAMP / PARK, TAIL LAMP DIAGNOSTIC 452 PU TORQUE CONVERTER 714 YL TRANSMISSION LEVER CODE 4
105 BR KEY SWITCH 314 PU STARTER RELAY NO. 2 OUTPUT 453 PK SECONDARY STEERING FAULT LAMP 715 GN TRANSMISSION LEVER CODE 5
106 WH MAIN POWER RELAY/INPUT 321 BR BACKUP ALARM / LAMP 454 GN RETARDER INDICATOR LAMP 716 BU TRANSMISSION LEVER CODE 6
107 WH ENGINE SHUT DOWN 322 GY WARNING HORN (FORWARD) 455 YL CONVERTER TEMP SWITCH TO TIME 720 PU TRANSMISSION BRAKE SWITCH
108 BU MISC WIPER, DOME LAMP, CIGAR 323 WH FUEL TRANSFER PUMP POWER DELAY 721 BR TRANSMISSION GEAR CODE 1
LIGHTER 324 BU DIFFERENTIAL LOCKUP SOLENOID Accessory Circuits 722 WH TRANSMISSION GEAR CODE 2
109 OR ALTERNATOR 325 PK FUEL PUMP RELAY OIL PRESS. 500 BR WINDSHIELD WIPER - FRONT (PARK) 723 OR TRANSMISSION GEAR CODE 3
110 GN WINDSHIELD WIPER SWITCH (RIGHT) SWITCH 501 GN WINDSHIELD WIPER - FRONT (LOW) 724 YL TRANSMISSION GEAR CODE 4
111 YL WINDSHIELD WIPER SWITCH (LEFT) 326 PU KEY SWITCH C” TERMINAL 502 OR WINDSHIELD WIPER - FRONT (HIGH) 725 GN TRANSMISSION GEAR CODE 5
112 PU MAIN POWER RELAY/OUTPUT 327 PK SHUTDOWN SOLENOID 503 BR WINDSHIELD WIPER - REAR (PARK) 726 BU TRANSMISSION GEAR CODE 6
113 OR OPERATOR MONITOR PANEL 328 RD SHUTDOWN MODULE OFF” 504 YL WINDSHIELD WIPER - REAR (LOW) 727 GN STEERING MOTOR RELAY
114 GN WARNING HORN (FORWARD)
Monitoring Circuits
505 BU WINDSHIELD WIPER - REAR (HIGH) 728 BU SUPPLEMENTAL STEERING CONTROL
115 PK FLOOD LAMP (FRONT) 400 GN Service Meter SWITCH 506 PU WINDSHIELD WASHER FRONT SWITCH
116 BR FLOOD LAMP (REAR) 403 GN ALTERNATOR (R) TERMINAL 507 WH WINDSHIELD WASHER REAR 733 BR SWITCHING GEAR CODE 1 FRONT
117 YL FLOOD LAMP (SIDE) 404 YL OPERATOR MON PANEL HYDRAULIC 510 YL WINDSHIELD WASHER-PRIMER 734 WH SWITCHING GEAR CODE 2 FRONT
118 GY WINDSHIELD WIPER SWITCH (FRONT) OIL TEMP 513 OR AIR CONDITIONER COMPRESSOR 735 OR SWITCHING GEAR CODE 3 FRONT
119 PK WINDSHIELD WIPER SWITCH (REAR) 405 GY OPERATOR MON PANEL OIL 514 PU AIR CONDITIONER CONDENSOR 736 YL SWITCHING GEAR CODE 4 FRONT
120 YL CONVERTER (24 V to 12 V) PRESSURE MOTOR 737 GN SWITCHING GEAR CODE 5 FRONT
121 YL BACKUP ALARM/LAMP/TRAVEL 406 PU OPERATOR MON PANEL COOLANT 515 GY BLOWER MOTOR (HIGH) 738 BR SWITCHING GEAR CODE 1 REAR
ALARM TIMER TEMPERATURE 516 GN BLOWER MOTOR (MEDIUM) 739 WH SWITCHING GEAR CODE 2 REAR
122 BU AIR DRYER 407 PK OPERATOR MON PANEL 517 BU BLOWER MOTOR (LOW) 740 OR SWITCHING GEAR CODE 3 REAR
123 WH GAGES (SERVICEMETER, TORQUE CONV/RETARDER OIL TEMP 519 PK THERMOSTAT TO DRYER PRESSURE 741 YL SWITCHING GEAR CODE 4 REAR
CONV SOLENOID) 408 WH OPERATOR MON PANEL BRAKE SWITCH 742 GN SWITCHING GEAR CODE 5 REAR
124 GN AIR CONDITIONER PRESS. (AIR) 520 WH OPERATOR AIR CONDITIONER SWITCH 743 PU SWITCHING NEUTRAL / RUN SWITCH
125 OR FUEL TRANSFER PUMP 409 OR OPERATOR MON PANEL NEUTRAL TO THERMOSTAT 744 BU SWITCHING UP SOLENOID
126 PK TRANSMISSION CONTROL 410 WH OPERATOR MON PANEL FAULT 521 YL AIR COND SW TO RFGT SW 745 GY SWITCHING DOWN SOLENOID
127 OR CAB FLOOD LAMP ALARM 522 WH AIR COND COMPR TO THERMO SW 746 PK SWITCHING SYNCHRONIZE SOLENOID
128 PK KICKOUT SOLENOID SWITCH 411 PK OPERATOR MON PANEL MASTER 523 BR WINDSHIELD WIPER-LEFT (PARK) 747 WH SWITCHING NO SYNCHRONIZE
129 BU CIGAR LIGHTER FAULT LAMP 524 BU WINDSHIELD WIPER-LEFT (LOW) SOLENOID
130 GN STOP LAMP 412 BU OPERATOR MON PANEL COOLANT 525 GY WINDSHIELD WIPER-LEFT (HIGH) 756 WH TRANSMISSION LOCKUP CLUTCH
131 BR FIRE CONTROL-OPERATOR WARNING FLOW 526 YL WINDSHIELD WIPER-RIGHT (PARK) SOLENOID
132 PK ANTISPIN CONTROL 413 BR OPERATOR MON PANEL FUEL 527 GN WINDSHIELD WIPER-RIGHT (LOW) 761 GY LIFT KICKOUT SOLENOID SWITCH
133 OR PROGRAMMED ELECTRONIC ENG PRESSURE 528 PK WINDSHIELD WIPER-RIGHT (HIGH) 762 YL BUCKET POSITIONER SOLENOID
CONT SOLENOID 414 PK OPERATOR MON PANEL LOW FUEL 529 WH WINDSHIELD WASHER-LEFT SWITCH
134 PK PROGRAMMED ELECTRONIC ENG 415 GN OPERATOR MON PANEL TEST SWITCH 530 OR WINDSHIELD WASHER-RIGHT 763 BU TORQUE CONVERTER SOLENOID
CONT LOGIC 416 OR SECONDARY STEERING SWITCH 531 WH FIRE WARNING HORN 764 PU SUPPLEMENTAL STEERING CONTROL
136 GN SUPPLEMENTAL STEERING 417 GY PRIMARY STEERING SWITCH 532 WH FIRE WARNING LAMP SWITCH (MOTOR GRADER)
137 RD STEERING MOTOR INDICATOR 418 YL OPERATOR MON PANEL OIL 533 RD HEAT SENSOR/TEST SWITCH 765 OR APRON SOLENOID (SCRAPER)
138 GN AUTOMATIC LUBE PUMP (TRUCK) PRESSURE (HIGH SETTING) 534 WH HEAT SENSOR/TEST SWITCH 767 WH ANTISPIN PICKUP POWER
141 PK AUXILIARY HEATER 419 YL OPERATOR MON PANEL PARKING 535 BU TRAVEL ALARM TIMER PRESS SWITCH 768 OR ANTISPIN PICKUP TRANSMISSION
101 RD Bat (+) BRAKE 536 OR TRAVEL ALARM TIMER MANUAL 769 BU ANTISPIN PICKUP LEFT
102 BU Hd Lmp 420 OR OPERATOR MON PANEL FUEL OVERRIDE 770 GN ANTISPIN PICKUP RIGHT
Ground Circuits FILTER/LOW ACCUM PRESS. 537 GR TURN SIGNAL SWITCH TO FLASHER 771 PU ANTISPIN SERVICE BRAKE SWITCH
200 BK MAIN CHASSIS 421 BU OPERATOR MON PANEL FAULT LAMP 538 BR HAZARD INDICATOR 772 BR ANTISPIN RETARDER SWITCH
201 BK OPERATOR MONITOR PANEL (SCRAPER) 539 BU TURN SIGNAL INDICATOR 773 GY ANTISPIN SERVOVALVE
202 BK TRANSMISSION CONTROL 422 YL OPERATOR MON WARNING HORN BASIC / RIGHT 774 YL ANTISPIN SOLENOID - LEFT
203 BK CHASSIS DIAGNOSTIC (SCRAPER) 540 WH TURN SIGNAL INDICATOR LEFT 775 BR ANTISPIN SOLENOID - RIGHT
204 BK OPERATOR MONITOR PANEL 423 GY OPERATOR MON PANEL TEST SWITCH
(SCRAPER) (SCRAPER) 600 BR DASH BASIC
205 BK INSTRUMENT 424 GY OPERATOR MON PANEL POWER 601 GY DASH HIGH
206 BK BATTERY SIDE OF DISCONNECT TRAIN TEMPERATURE 602 WH DOME
207 BK STARTER DIAGNOSTIC 425 PK OPERATOR MON PANEL POWER 603 PK ROTARY BEACON
212 BK ANTISPIN CODING PIN 16 TRAIN OIL LEVEL 604 OR STOP
213 BK ANTISPIN CODING PIN 17 426 BR OPERATOR MON PANEL POWER 605 YL TURN LEFT
214 BK ANTISPIN CODING PIN 18 TRAIN OIL FILTER 606 GY TURN RIGHT
215 BK ANTISPIN CODING PIN 19 427 GN OPERATOR MON PANEL POWER 607 PK FLOOD FRONT
216 BK ANTISPIN CODING PIN 20 TRAIN OIL FILTER JUMPER 608 GN FLOOD REAR
217 BK TRANSMISSION CODING PIN 17 428 OR OPERATOR MON PANEL 609 YL FLOOD SIDE
218 BK TRANSMISSION CODING PIN 18 TRANSMISSION OIL TEMP 610 OR HEAD LAMP BASIC
219 BK TRANSMISSION CODING PIN 19 429 YL OPERATOR MON PANEL BRAKE OIL 611 PU HEAD LAMP HIGH
226 BK OPERATOR MON PANEL SET POINT TEMPERATURE 612 GY BACKUP
SELECT 431 GN OPERATOR MON PANEL LOW 613 PK LICENSE PLATE
227 BK TRANSMISSION CODING PIN 37 TRANSFER PUMP PRESS. 614 PU PARK/TAIL/DASH
231 BK TRANSMISSION SW 432 PK OPERATOR MON PANEL BRAKE 615 YL CAB FLOOD/ROPS
236 BK TRANSMISSION CODING PIN 36 PRESSURE (OIL) 616 BU BUCKET FLOOD
241 BK OPERATOR MON PANEL TIME 433 BU OPERATOR MON PANEL BRAKE 617 BR TAIL/POSITION LAMP-LEFT (ROADING
DELAY PIN 3 PRESS. (OIL) JUMPER PACKAGE)
242 BK OPERATOR MON PANEL TIME 434 BU OPERATOR MON PANEL POWER 618 YL TAIL/POSITION LAMP-RIGHT (ROADING
DELAY PIN 4 TRAIN TEMP JUMPER PACKAGE)
243 BK OPERATOR MON PANEL TIME 435 YL OPERATOR MON PANEL POWER 619 GR HEAD LAMP LOW
DELAY PIN 5 TRAIN TEMP JUMPER 622 PU FLOODLAMP 3 WAY SWITCH JUMPER
244 BK OPERATOR MON PANEL TIME 436 OR OPERATOR MON PANEL POWER 623 BU FLOODLAMP 3 WAY SWITCH JUMPER
DELAY PIN 6 TRAIN OIL FILTER JUMPER 624 YL FLOODLAMP BOWL
Basic Machine Circuits 437 BR OPERATOR MON PANEL FUEL LEVEL 625 BK COURTESY LAMP
301 BU STARTER NO. 1 SOLENOID TO FUEL FILTER JUMPER
TO RESISTOR 438 YL OPERATOR MON PANEL COOLANT 702 OR TRANSMISSION BRAKE SWITCH
302 OR STARTER NO. 1 TO TEMP JUMPER JUMPER
DIAGNOSTIC! RESISTOR TO 440 BR AIR PRESS. GAGE 703 BU TRANSMISSION UP SOLENOID
DIAGNOSTIC 441 OR ENGINE COOLANT TEMP GAGE 704 GY TRANSMISSION DOWN SOLENOID
304 WH STARTER RELAY NO. 1 OUTPUT 442 GY HYDRAULIC SYSTEM TEMP GAGE 705 PK TRANSMISSION LOCKUP CLUTCH SOL
306 GN STARTER RELAY COIL / NEUTRAL 443 YL POWER TRAIN TEMP GAGE BASIC
START SWITCH 444 BU CONV/RETARDER OIL TEMP GAGE 706 BR TRANSMISSION RETARDER SWITCH
308 YL MAIN POWER RELAY COIL (TRACTOR) 707 PU TRANSMISSION BED RAISE SWITCH
310 PU ETHER SWITCH TO ETHER SOLENOID 445 GN CONV / RETARDER OIL TEMP GAGE 708 YL TRANSMISSION HOLD SWITCH
311 WH ETHER SOLENOID TO TEMPERATURE (SCRAPER) 709 OR TRANSMISSION PICKUP POWER
SWITCH 446 PU BRAKE OIL TEMPERATURE GAGE 710 GN TRANSMISSION SPEED PICKUP SIGNAL
312 PK STARTER NO.2 SOLENOID 449 BU SPEEDOMETER SENDER 711 BR TRANSMISSION LEVER CODE 1
Wire Description
Lighting Circuits
Control Circuits
711-BR-18
712-WH-18
713-OR-18
714-YL-18
715-GN-18
716-BU-18
202-BK-18
409-OR-18
200-BK
321-BR
SERVICE BRAKE
SWITCH
BED RAISE
(XMSN TEST
SWITCH
)
BACKUP
ALARM SW.
N. O.
N. C.
ZZ
ZZ
1
2
3
4
5
6
7
8
9
10
14
3
4
5
8
9
1
2
10
6
7
SHIFT LEVER
SWITCH
LEVER 1
LEVER 2
LEVER 3
LEVER 4
LEVER 5
GND VERIFY
GROUND
NEUTRAL
D
D
711-BR
712-WH
713-OR
714-YL
715-GN
716-BU
202-BK
N.O.
N.C.
202-BK
707-PU
J
D
1
2
2
D
A
202-BK
707-PU
RETARDER
BRAKE SWITCH
EMERGENCY
BRAKE SWITCH
200-BK
EMS PIN 9
BACKUP ALARM
202-BK
720-PU
702-OR
706-BR
LEVER 1
LEVER 2
LEVER 3
LEVER 4
LEVER 5
GND VERIFY
11
12
13
14
15
16
8
27
28
29
BRAKE
RETARDER
BED RAISE
BATTERY
30
31
20
32
33
34
6
35
36
7
1
308-YL
202-BK
308-YL
1
2
6
KEY
START
SWITCH
R
C
S
B
ST
ON
OFF
10A
KEY
BREAKER
105-BR
109-OR-10
202-BK
60A
ALTERNATOR
BREAKER
TRANSMISSION
SWITCH
101-RD-6
A
C
25
20
TRANSMISSION
SPEED
SENDER
202-BK
101-RD-6
STEERING
MOTOR
RELAY
-
+
+
-
-
+
12V BATTERY12V BATTERY
DISCONNECT SW.
BK-00
9
10
19
18
17
37
to
TO
TRANSMISSION
SPEED
DISTRIBUTOR
D
E
19
10
12
9
8
7
17
SEE NOTE: A
709-OR
710-GN
202-BK
+V
XMSN SPEED
ID CODE 0
ID CODE 1
ID CODE 2ID CODE 3
ID CODE 2
UP SHIFT SOL
GROUND
DOWN SHIFT SOL
LOCK UP SOL
GEAR 1
GEAR 3
GEAR 2
GEAR 4
GEAR 5
GND VERIFY
4
5
21
22
23
24
25
26
703-BU
704-GY
705-PK
721-BR
722-WH
723-DR
723-OR
724-YL
725-GN
726-BU
TRANSMISSION
CONTROL
20
13
14
15
20
1
2
3
4
5
6
721-BR
722-WH
723-OR
724-YL
725-GN
726-BU
704-GY
705-PK
703-BU
709-OR
710-GN
202-BK
A
B
E
A
B
E
A
B
E
UP SHIFT
SOLENOID
SOLENOID
SOLENOID
DOWN SHIFT
LOCK UP
231-BK
E
G
A
B
C
E
F
H
10
BK-18
BR-18
WH-18
OR-18
YL-18
GN-18
BU-18
XX
XX
GROUND
GEAR 1
GEAR 3
GEAR 2
GEAR 4
GEAR 5
GND VERIFY
TRANSMISSION
SWITCH
10
9
8
7
6
3
2
1
4
5
E
A
C
B
+V
SIGNAL
GROUND
SHIFT LEVER
SWITCH
R
N
1
2
3
4
5
10
9
8
6
5
4
3
2 1
6
7
8
TEST
N
R
1
2
3
4
5
6
10
9
8
7
6
4
3
2
1
7
8
D65604
3
3
4
4
5
5
6
6
9
8
9
8
10
10
1
1
2
2
7
7
1. Transmission control.
2. Shift lever switch.
3. Transmission switch.
4. Transmission speed sender.
5. Upshift and downshift solenoids.
6. Lockup solenoid.
7. Retarder brake switch.
8. Emergency brake switch.
9. Service brake switch.
10. Bed raise (XSMN test) switch.
COMPONENT IDENTIFICATION
10 PIN CONNECTOR
(ZZ) 3T2337 HARNESS
SHIFT LEVER
SWITCH
10 PIN CONNECTOR
(ZZ) 3T2337 HARNESS
SHIFT LEVER
SWITCH
14 PIN CONNECTOR
(D) 51594 HARNESS (CAB)
(ZZ) 3T2337 HARNESS
14 PIN CONNECTOR
(D) 51594 HARNESS (CAB)
(ZZ) 3T2337 HARNESS
37 PIN CONNECTOR
(D) 5T594 HARNESS (CAB)
TRANSMISSION
CONTROL
37 PIN CONNECTOR
(D) 5T594 HARNESS (CAB)
TRANSMISSION
CONTROL
25 PIN CONNECTOR
(A) 6G9470 HARNESS
(C) FOR HARNESS
SEE NOTE
20 PIN CONNECTOR
(D) 5T594 HARNESS (CAB)
(E) (CHASSIS) HARNESS SEE
**NOTE
25 PIN CONNECTOR
(A) 6G9470 HARNESS
(C) FOR HARNESS
SEE NOTE
20 PIN CONNECTOR
(D) 5T594 HARNESS (CAB)
(E) (CHASSIS) HARNESS SEE
**NOTE
3 PIN CONNECTOR
(E) (CHASSIS) HARNESS SEE
**NOTE
TRANSMISSION
SPEED SENDER
3 PIN CONNECTOR
(E) (CHASSIS) HARNESS SEE
**NOTE
TRANSMISSION
SPEED SENDER
6 PIN CONNECTOR
(A) 6G9470 HARNESS
(D) 5T594 HARNESS (CAB)
6 PIN CONNECTOR
(A) 6G9470 HARNESS
(D) 5T594 HARNESS (CAB)
2 PIN CONNECTOR
(D) 5T594 HARNESS (CAB)
(J) 5T1659 HARNESS
2 PIN CONNECTOR
(D) 5T594 HARNESS (CAB)
(J) 5T1659 HARNESS
10 PIN CONNECTOR
(E) (CHASSIS) HARNESS SEE
**NOTE
(XX) 7T3418 HARNESS
10 PIN CONNECTOR
(XX) 7T3418 HARNESS
TRANSMISSION
SWITCH
10 PIN CONNECTOR
(E) (CHASSIS) HARNESS SEE
**NOTE
(XX) 7T3418 HARNESS
10 PIN CONNECTOR
(XX) 7T3418 HARNESS
TRANSMISSION
SWITCH
STANDARD
W/RETARDER
STANDARD
W/RETARDER
1C-2C
*1802 rpm
2230 rpm
7-6
1450 rpm
1566 rpm
2C-2L
*1618 rpm
6-5
2L-3
2065 rpm
5-4
3-4
4-3
4-5
3-2L
5-6
2L-2C
‘1471 rpm
6-7
2C-1C
*1067 rpm
*1361 rpm
N-R
1146 rpm
-
STANDARD
W/RETARDER
STANDARD
W/RETARDER
1C-1L
*1542 rpm
2280 rpm
7-6
1500 rpm
1591 rpm
1L-2
2170 rpm
6-5
2-3
2150 rpm
5-4
3-4
4-3
4-5
3-2
5-6
2-1L
1415 rpm
6-7
1L-1C
*1400 rpm
*1361 rpm
N-R
*845 rpm
-
STANDARD
W/RETARDER
STANDARD
W/RETARDER
1C-1L
*1439 rpm
2280 rpm
7-6
1465 rpm
1591 rpm
1L-2
2100 rpm
6-5
2-3
5-4
3-4
4-3
4-5
3-2
5-6
2-1L
6-7
1L-1C
*1300 rpm
N-R
*688 rpm
-
*Can only be checked with axles pulled, or rear wheels off the ground.
C — Torque Converter
L — Lockup (Direct Drive)
773B TRUCK & 772B TRACTOR
UPSHIFT
SHIFT POINTS
(Nominal Engine Speed)
DOWNSHIFT
SHIFT POINTS
(Nominal Engine Speed)
*Can only be checked with axles pulled, or rear wheels off the ground.
C — Torque Converter
L — Lockup (Direct Drive)
769C TRUCK & 768C TRACTOR
UPSHIFT
SHIFT POINTS
(Nominal Engine Speed)
DOWNSHIFT
SHIFT POINTS
(Nominal Engine Speed)
*Can only be checked with axles pulled, or rear wheels off the ground.
C — Torque Converter
L — Lockup (Direct Drive)
777 TRUCK & 776 TRUCK-TRACTOR
UPSHIFT
SHIFT POINTS
(Nominal Engine Speed)
DOWNSHIFT
SHIFT POINTS
(Nominal Engine Speed)
IDENT. HARNESS AS.
*776 & 777 = 5T4200
A 6G9470
772B & 773B = 5T2541
C *
MACHINE 0 (19) 1 (18) 2 (17) 3 (37)
768C & 769C = 5T2569
D 5T594
777 & 776 TRUCKS OPEN OPEN OPEN OPEN
E **
773B & 772B TRUCKS GROUND GROUND GROUND GROUND
*776 & 777 = 5T4320
J 5T1569
769C & 768c TRUCKS GROUND OPEN OPEN GROUND
772B & 773B = 5T7406
XX 7T3418
CONTROL WIRE 219-BU 218-BK 217-BK 227-BK
768C & 769C = 5T7404
ZZ 3T2337
TRANSMISSION CONTROL CODE
ID CODE (PIN)
