SENR8631 WIRE DESCRIPTION CHART

August 1994 Wire Wire Wire Wire

Number Color Description Number Color Description
Power Distribution Circuits Accessory Circuits
101 RD BAT 500 BR WIPER - FRONT (PARK)
8 25
102 BU HD LMP 501 GN WIPER - FRONT (LO)
103 YL AUX CKT 502 OR WIPER - FRONT (HI)
3 105 BR KEY SW 503 BR WIPER - REAR (PARK)
109 OR ALT OUTPUT (+) TERM. 504 YL WIPER - REAR (LO)
112 PU MAIN POWER RELAY OUTPUT 505 BU WIPER - REAR (HI)
6 18 113 OR OPRMON PANEL 506 PU WASHER - FRONT
17 114 GN WARNING HORN (FORWARD) 507 WH WASHER - REAR
2 29 31 117 YL AUX CKT 513 OR A/C COMPRESSOR/REFRIGERANT PRESS. SW
118 GY AUX CKT 515 GY BLOWER MOTOR (HI)
11 119 PK AUX CKT 516 GN BLOWER MOTOR (MEDIUM)
32 28 23 13 121 YL BACKUP ALARM TO LAMP 517 BU BLOWER MOTOR (LO)
27 37 34 13
12 10
24 30 1 122 BU AUX CKT 521 YL A/C SW TO REFRIGERANT SW
26 14 7 9 20 12 123 WH AUX CKT 522 WH A/C CLUTCH TO THERMOSTAT SW
17 2 3 6 124 GN A/C Lighting Circuits
11 8 19 16 125 OR AUX CKT 600 BR DASH LAMP BASIC
14 21 22 4 36 15 18 15 7 39 126 PK XMSN CONT 601 GY DASH LAMP HI
9 10 165 YL AUX CKT 602 WH DOME LAMP
5 Ground Circuits 604 OR STOP LAMP
20 A 22
21 200 BK MAIN CHASSIS 608 GN FLOOD LAMP - REAR
16 35 201 BK OPR MON PANEL 609 YL FLOOD LAMP - SIDE
38
B 202 BK XMSN CONT 610 OR HEAD LAMP BASIC
19 40 33 5 1 203 BK CHASSIS DIAGNOSTIC 611 PU HEAD LAMP HI
4
204 BK OPR MON PANEL (SCRAPER) 614 PU PARK/TAIL/DASH LAMP
207 BK STARTER DIAGNOSTIC 619 GN HEAD LAMP LO
211 BK DISC DIAGNOSTIC RESISTOR 639 WH LEFT HAND STOP/TAIL LAMP
231 BK XMSN SW 640 GN RIGHT HAND STOP/TAIL LAMP
Basic Machine Circuits Control Circuits

621E & 623E Wheel Tractor-Scrapers 301

302
304
BU
OR
WH
STARTER NO.1 SOL
STARTER NO.1 RESISTOR TO DIAGNOSTIC
STARTER RELAY NO.1 OUTPUT
703
704
708
BU
GY
YL
XMSN UP SOL
XMSN DOWN SOL
XMSN HOLD SW

21 22 Electrical System 306

307
GN

OR
STARTER RELAY COIL TO NEUT START SW
OR KEY SW
KEY SW TO NEUT START SW
709
710
711
OR
GN
BR
SENSOR POWER SUPPLY
XMSN SPEED PICKUP SIGNAL
XMSN LEVER CODE 1
308 YL MAIN POWER RELAY COIL 712 WH XMSN LEVER CODE 2
A 310 PU START AID SW TO START AID SOL 713 OR XMSN LEVER CODE 3
311 WH START AID SOL TO TEMP SW 714 YL XMSN LEVER CODE 4
13
6AB1428-UP 321
322
BR
GY
BCKP ALARM LAMP TRAVEL ALARM
WARNING HORN (FORWARD)
715
716
GN
BU
XMSN LEVER CODE 5
XMSN LEVER CODE 6
6YF197-UP 323 WH FUEL PUMP POWER 717 BR BOWL APRON SOL FLOAT/VCTC SOL
14 5 324 BU DIFF LOCK SOL 721 BR XMSN GEAR CODE 1
21 2 3 CAT Monitoring Circuits 722 WH XMSN GEAR CODE 2
6 19
36 4 6 15 15 12 400 GN SERVICE METER SW 723 OR XMSN GEAR CODE 3
20 16 35 22 4 403 GN ALTERNATOR (R) TERM. 724 YL XMSN GEAR CODE 4
9 10 18
28 405 GY OPR MON OIL PRESS. (LO SETTING) 725 GN XMSN GEAR CODE 5
27 11 B 406 PU OPR MON COOLANT TEMP 726 BU XMSN GEAR CODE 6
18 26 23
2940 31 1 17 407 PK OPR MON CONVERTER/RETARDER OIL TEMP 733 BR SWITCHING GEAR CODE 1 FRONT
2 7 9 20 37 34 8 19 16 1 408 WH OPR MON SYSTEM AIR PRESS. 734 WH SWITCHING GEAR CODE 2 FRONT
17 33 14 5 38 1210 24 30 7 39 409 OR OPR MON NEUT 735 OR SWITCHING GEAR CODE 3 FRONT
11 410 WH OPR MON ACTION ALARM 736 YL SWITCHING GEAR CODE 4 FRONT
32
25 8 3 411 PK OPR MON ACTION LAMP 737 GN SWITCHING GEAR CODE 5 FRONT
13 412 BU OPR MON COOLANT FLOW 738 BR SWITCHING GEAR CODE 1 REAR
413 BR OPR MON FUEL PRESS. 739 WH SWITCHING GEAR CODE 2 REAR
415 GN OPR MON TEST SW 740 OR SWITCHING GEAR CODE 3 REAR
417 GY PRIMARY STER SW 741 YL SWITCHING GEAR CODE 4 REAR
419 YL OPR MON PARKING BRAKE 742 GN SWITCHING GEAR CODE 5 REAR
421 BU OPR MON ACTION LAMP (SCRAPER) 743 PU SWITCHING NEUT/RUN SW
422 YL OPR MON ACTION ALARM (SCRAPER) 744 BU SWITCHING UP SOL
423 PU OPR MON TEST SW (SCRAPER) 745 GY SWITCHING DOWN SOL
441 OR ENG COOLANT TEMP GAGE 746 PK SWITCHING SYNCHRONIZE SOL
444 BU CONVERTER/RETARDER OIL TEMP GAGE 747 WH SWITCHING NO SYNCHRONIZE SOL
445 GN CONVERTER/RETARDER OIL TEMP GAGE 781 PK AUGER BUFFER BOX TO NEUT START CONT
(SCRAPER) 787 WH AUGER BUFFER BOX
450 YL TACH SENDER (+) 895 BR AUGER BUFFER BOX TO NEUT START CONT
Machine Harness Connector and Component Locations 451 BR TACH SENDER (-) 896 GN AUGER BUFFER BOX TO AEM RESISTOR
470 PU CANE SW NEUT
A417 WH OPR MON SCRAPER XMSN

© 1994 Caterpillar Printed in U.S.A.

All Rights Reserved

Component Location Chart HARNESS CONNECTOR LOCATION CHART

Machine Schematic Machine Schematic Machine Harness And/Or Schematic Machine Harness And/or Schematic
Location
Component
Location Location
Component
Location Connectors
Location Components Location Connectors
Location Components Location Harness And Wire Electrical Schematic Symbols
1 Alarm - Backup C-9 19 Solenoid - Up Shift A-4 D - 8X-2348 P - 5T-1563 (82tE)
A Alarm - Action (EMS) E-3 20 Starter B-3 F-7 C-7
Trans Control 6 Contacts A - 5T -1639 (82tE)
2 Alternator B-2 21 Switch - Apron E-7
37 Contacts
D - 8X-2348 P-2T-1878(623E)
Electrical Schematic Symbols And Definitions A AA 1 1
3 Batteries A-3 22 Switch - Backup Alarm F-6 C-4 C-7 1 2 2
W - 8X-2296 A - 2T-1910 (623E)
B Breaker - Alternator (60A) E-5 A Switch - Blower Motor E-3 Typical representation of a Typical representation of a
A - 8W-7413 D - 8X-2348
B Breaker - Blower Motor (15A) E-4 23 Switch - Brake Air Pressure E-8 25 Contacts C-2 C-3
W - 8X-2296 W - 8X-2296
Deutsch connector. The Sure-Seal connector. The
B Breaker - Dome, Stop, Tail, E-4 24 Switch - Converter/Retarder Temp A-3 Plug Receptacle plug contains all sockets plug and receptacle contain
W - 8X-2296 G - 5T-1632
Panel Lamps A Switch - Panel Lamp Dimmer F-3 E-5 F-4 and the receptacle contains both pins and sockets.
Diagnostic Conn W - 8X-2296 2 all pins.
B Breaker - Head Lamp (15A) E-4 25 Switch - Disconnect A-3 20 Contacts
T
W - 8X-2296 W - 8X-2296
B Breaker - Key Start (10A) E-5 A Switch - Dome Lamp F-6 E-3 D-1 Pressure Temperature Level Flow
Operator Monitor 4 Contacts Y - 6G-9985
4 Control - Neutral Start E-6 A Switch - Dome Lamp (Door) F-5 Symbol Symbol Symbol Symbol
D - 8X-2348 Y - 6G-9985
Pin or Socket
5 Control - Transmission F-9 A Switch - Ems Test E-3 14 Contacts C-5 F-1 Number
WW - 8W-2179 Front Wiper Motor
6 Dryer - Air A-2 26 Switch - Engine Coolant Flow A-2
A Gauge - Converter/Retarder Temp D-6 27 Switch - Engine Coolant Temp (EMS) B-3 D - 8X-2348 Z - 6G-9986 Wire, Cable, or Harness Component
B-5 F-6 Assembly Identification
CCC - 8X-2114 Rear Wiper Motor Part Number
A Gauge - Engine Coolant Temp D-5 28 Switch - Engine Coolant Temp (S. Aid) A-2
V - 7T-3418 Single Wire
A Meter - Service E-6 29 Switch - Engine Oil Pressure (EMS) B-2 Connector
A-5
A Motors - Blower F-1 ,2 30 Switch - Engine Oil Pressure B-3 CCC - 8X-2114 Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
10 Contacts A AA 9X-1123
V - 7T-34t8 C A
A Motor - Front Washer D-8 Fuel Pump)
B-4 325-PK-14 1 325-PK-14
A Motor - Rear Washer D-8 A Switch - Flood Lamp E-3 Trans Switch
A Motor - Front Wiper F-2 A Switch - Side Flood Lamp F-4 WW - 8W-2179 Normally open switch that is closed due to an applied condition, and will open again with a Pin Wire
F-6 Socket Color
A Motor - Rear Wiper F-6 A Switch - Forward Horn F-5 Shift Lever Sw specific decrease in that condition.
7 Pump - Fuel Transfer B-8 32 Switch - Fuel Pressure A-2 W - 8X-2296
9 Contacts
B Relay - Main E-5 33 Switch - Head Lamp Dimmer E-8
E-6
Neutral/Start Control
2 200-BK-14
B Relay - Start E-5 A Switch - Key Start E-4 A - 8W-7413 RELATED ELECTRICAL SERVICE MANUALS Normally closed switch that will open with an increase of a specific condition.
A Resistor - Blower Motor Speed E-2 34 Switch - Parking Brake Pressure A-5 C-3
D - 8X-2348 Title Form No.
Circuit Number Wire
A Resistor - Panel Lamp Dimmer F-3 35 Switch - Refrigerate Pressure E-1
8-5T-5218 Electronic Monitoring System (EMS) SENR2945 Identification Gauge
9 Resistor - Starter To Diagnostic Conn B-3 A Switch - Running Lamp F-4 C-2
D - 8X-2348 Starting And Charging Systems SENR2947
10 Sender - Converter/Retarder Temp A-3 36 Switch - Shift Lever F-7
Normally closed switch that is open due to an applied condition, and will close again
D - 8X-2348 Starting Motor: with a specific decrease in that condition.
11 Sender - Engine Coolant Temp B-3 A Switch - Start Aid F-5 C-7 Electrical Schematic Symbols And Definitions
N - 5T-1527 Consist No 6N-1889
12 Sender - Tachometer A-2 37 Switch - Steering Flow A-4
D - 8X-2348 8C-3644 SENR3581
13 Sender - Transmission Speed A-4 38 Switch - Stop Lamp Pressure E-8 7 Contacts E-1
X - 8C-4764 9X-4452 SENR4975 FUSE - A component in an electrical circuit that will open the circuit if too much current flows
14 Solenoid - Air Conditioner Clutch C-1 A Switch - Thermostat E-1 The circle indicates that the component has screw terminals and a wire can be disconnected through it.
N - 5T-1527 7T-0794 SENR3536 from it.
15 Solenoid - Apron E-7 39 Switch - Transmission A-5 C-7
P - 5T-1563 (621 E)
16 Solenoid - Down Shift A-4 40 Switch - Transmission Hold F-7 REED SWITCH - A switch whose contacts are controlled by a magnet. A magnet closes the
17 Solenoid - Forward Horn E-8 A Switch - Front Wiper F-3
N - 5T-1527 contacts of a normally open reed switch; it opens the contacts of a normally closed reed switch.
C-7
P-2T-1878(623E)
17 Solenoid - Differential Lock E-8 A Switch - Rear Wiper F-3 No circle indicates that the wire cannot be disconnected from the component.
18 Solenoid - Start Aid A-2 A Tachometer D-2 W - 8X-2296
D-1 SENDER - A component that is used with a temperature or pressure gauge. The sender
A = Components located in operator's compartment. Z - 6G-9986
measures the temperature or pressure. Its resistance changes to give an indication to the
B = Components located on the relay panel. T gauge of the temperature or pressure.
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position This indicates that the component has a wire connected to it that is connected to ground.
RELAY (Magnetic Switch) - A relay is an electrical component that is activated by electricity.
2M-9346 Stop Lamp Pressure 45.0 kPa MAX 5.0 kPa MIN kPa Normally Open
(6.5 psi MAX) (0.5 psi MIN)
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.
Resistor, Sender and Solenoid Specifications 6T-7663 Engine Oil Pressure 93.0 ± 20.8 kPa 68.9 ± 20.8 kPa Normally Open
(13.5 ± 3.0 psi) (10.0 ± 3.0 psi)
Part No. Component Description Resistance (Ohms)¹
9G-1950 Resistor - Blower Motor Speed Overall; 2.0 ± 0.1 7N-9560 Conv/Retr Oil Temp (EMS) 129.4 ± 2.8°C 118.3°C MIN Normally Closed This indicates that the component does not have a wire connected to ground. It is grounded CIRCUIT BREAKER (C/B) - A component in an electrical circuit that will open the circuit if too
(265.0 ± 5.0°F) (245.0°F MIN) by being fastened to the machine. much current flows through it. This does not destroy the circuit breaker and it can be reset to
Tap; 1.00 ± .05
7T-2078 Steering Flow (EMS) 11 liter/min MAX (25.4 mm ID line) 4.9 liter/min MIN (25.4 mm ID line) Normally Open become part of the circuit again.
3T-3123 Resistor - Panel Lamp Dimmer 25.0 ± 0.25 [2.9 (U.S. gpm) MAX (1.0 in. ID line)] [1.3 (U.S. gpm) MIN (1.0 in. ID line)]
6T-2217 Resistor - Starter/Diagnostic 150.0 ± 7.5 8N-1693 Engine Coolant Temp (S. Aid) 38 ± 3°C 27°C MIN Normally Closed SOLENOID - A solenoid is an electrical component that is activated by electricity. It has a coil
7T-8600 Solenoid - A/C Clutch 14.4 ± 0.6 (100± 5OF) (81OF MIN) that makes an electromagnet when current flows through it. The electromagnet can open or
7N-9719 Solenoid - Apron; Differential Lock 68 8T-9792 Air Pressure (EMS) 517 ± 35 kPa 448 ± 35 kPa 1-2, Normally Open close a valve or move a piece of metal that can do work.
7T-9074 Solenoid - Forward Horn 55.0 ± 6.0 (75 ± 5 psi) (65 ± 5 psi) 1-3, Normally Closed

9G-4365 Solenoid - Start Aid 6 9W-2343 Engine Coolant Flow (EMS) 37.0± 3.0 grams 31.0 grams MIN Normally Open MAGNETIC LATCH SOLENOID - A magnetic latch solenoid is an electrical component that is
(1.3 ± 0.1 oz.) (1.1 oz. MIN) activated by electricity and held latch by a permanent magnet. It has two coils (latch and unlatch)
9P-0222 Solenoid - Up/Down Shift 26.0 ± 2.0
9W-3187 Fuel Pressure (EMS) 93.0 ± 21.0 kPa 69 ± 21 kPa Normally Closed that make electromagnet when current flows through them. It also has an internal switch that places
¹ At room temperature unless otherwise noted.
(13.5 ± 3.0 psi) (10 ± 3 psi) the latch coil circuit open at the time the coil latches.
 9 8 7 6 5 4 3 2 1
L17
602-WH 1
TRANSMISSION CONTROL 200-BK 2 310-PU 310-PU
9W0009 L
322-GY

L17
REAR XX W L28 L28
36 202-BK WIPER 743-PU H
L19 MOTOR Y
LEVER 1 11 711-BR L 6T6216 202-BK 610-OR-14
LEVER 2 12 712-WH DOOR DOME 609-YL 619-GN-14 RD 118-GY T¡ GN 1 501-GN

L19
LEVER 3 13 713-OR H LAMP SW 614-PU 3 118-GY
L10 FRONT GY
MOTOR Z (NOTE B) B B H
LEVER 4 14 714-YL 614-PU WIPER SW BR 4 500-BR
3T3133 XX
LEVER 5 15 715-GN GN 1 504-YL 103-YL PANEL RD 2 502-OR

L10
T¡ OR

GND VERIFY
SHIFT 3T6655
GND VERIFY 16 716-BU LEVER SW GY 3 119-PK DIMMER 118-GY FRONT

NEUTRAL
GROUND
HOLD SW 8 708-YL 4 503-BR RESISTOR 502-OR

LEVER 5
LEVER 4
LEVER 3
LEVER 2
LEVER 1
9W0681 BR W W 8 9 WIPER
L18

1
2
+ BATTERY 1 126-PK OR 2 505-BU 3T3123 501-GN 6T6216 MOTOR MOTOR
L16 7 W L

117-YL
W

1
2
3
4
31 200-BK 614-PU 500-BR

L18
BACKUP G 6 W 2 1 WP
32 103-YL 322-GY 614-PU 600-BR W

WH/RD-14

WH/RD-14
ALARM SW

OPERATOR STATION
33 602-WH 5 3 601-GY BLOWER BLOWER
6G4195 PANEL
4

7
9
8
5
4
3

BK-14
10
6
2
1
F F

BK-14
34 601-GY 506-PU 9G8693 9G8697

102-BU-14
WW C NC 12 DIMMER SW
35 WW
NO 11 4D1836
29 202-BK-18 Z 601-GY

202-BK
743-PU

614-PU

103-YL
5 602-WH 3 WH 10 601-GY

102-BU-14
W

609-YL
3

117-YL
GEAR 1 21 721-BR 103-YL 1 YL 601-GY 601-GY
RUNNING

103-YL
2 REAR

712-WH-18
GEAR 2 22 722-WH 200-BK 2 BK 119-PK

715-GN-18

713-OR-18
470-PU-18
716-BU-18
PANEL LAMP

202-BK

711-BR-18
714-YL-18
FORWARD 1 2 1 LAMP

1
2

1
2
GEAR 3 23 723-OR WIPER SW 7N5876

202-BK

200-BK
HORN SW

321-BR
708-YL
L32 4 5 SW B B H X X

OPERATOR STATION
GEAR 4 24 724-YL W 119-PK 3T6655 200-BK
DOME 3T2357 SIDE FLOOD 3T3826 BASE W
GEAR 5 25 725-GN 118-GY 119-PK

L32

200-BK-14
310-PU

515-GY-14
114-GN
LAMP LAMP SW 9D8047
GND VERIFY 26 726-BU 103-YL 505-BU
WW 8C9678 3T1730 L36 L36
UP SOL 3 703-BU START AID SW 102-BU-14 504-YL
DOWN SOL 4 704-GY HOLD SW 3T3453 117-YL 503-BR
+10V 9 709-OR 8D2676 NEUTRAL/START 114-GN L

L31
CONTROL W W WP

L35
XMSN SP 10 710-GN
30 W 7X1362 123-WH 200-BK-14
507-WH
28 202-BK 6 GY-18 113-OR 200-BK-14
ID CODE 3 37 7 BU-18 515-GY-14
ID CODE 2 17 202-BK 202-BK 8 BR-18 KEY START SW PANEL LAMP 515-GY-14

308-YL
ID CODE 1 18 3 WH-18 9G7641 W 7N5876 516-GN-14
D
ID CODE 0 19 202-BK 202-BK 200-BK 5 GN-18 608-GN 601-GY 517-BU-14

601-GY
601-GY
601-GY
27 126-PK 1 PK-18 + BATTERY DIAGNOSTIC CONNECTOR BASE 200-BK
FLOOD LAMP SW W X
GROUND 2 202-BK 307-OR 9 OR-18 START SW + BATTERY 1 113-OR 9D8047

OFF

ST
8D2676

ON
2
10
11
7
3
1
13
14
15
16
17
5
9
4
18
19
8
20
12
6
7 202-BK 200-BK 2 BK-18 GROUND PARK BK 19 419-YL

L35
D W L29 L29
6 202-BK APRON SW (NOTE C) 470-PU 4 PU-18 NEUTRAL AIR PR 8 408-WH RESISTOR
FORWARD

C
S
B
207-BK
302-OR
310-PU
311-WH

101-RD

105-BR
109-OR
304-WH

308-YL

112-PU
307-OR
20 202-BK 200-BK 2 HORN 2G3970 W NEUTRAL 9 409-OR 9G1950
322-GY 1 306-GN 1 GN-18 START RELAY 601-GY W OPERATOR 20 403-GN
D SOLENOID
409-OR 2 OR-18 OPR PANEL MONITOR ALTERNATOR 3 403-GN
7T9074

307-OR
105-BR
308-YL
M 3T9100 X
3 YL-18 COOL FLOW 12 412-BU

507-WH
506-PU
307-OR
L20
D W 124-GN-14 COOL TEMP 6 406-PU
DIFFERENTIAL REFRIGERANT SW
200-BK FUEL PR 13 413-BR

200-BK-14
L20
LOCK SOLENOID L23 BLOWER SW (NOTE A)
324-BU ENG OIL PR 5 405-GY

306-GN
W

307-OR
200-BK

200-BK
126-PK
7N9719 M BLOWER 6P3236 9D6888
717-BR - 200-BK CONV TEMP 7 407-PK
MOTOR

101-RD
200-BK 101-RD W PP 124-GN-14 16 201-BK
PANEL PANEL BREAKER THERMOSTAT SW
201-BK 201-BK 101-RD-14 2 GROUND 2 201-BK

203-BK
APRON (NOTE C) SERVICE LAMP LAMP KEY 6N8589 7T9277
E 1 112-PU-14 4 E

L25
SOLENOID METER 7N5876 7N5876 15 1 L26 X

522-WH-14
BKR W

516-GN-14

513-OR-14
14 201-BK

200-BK-14
515-GY-14

517-BU-14

521-YL-14
126-PK
7N9719 6T7337 BASE BASE W 9G9487 W 10 RED 2
W 521-YL-14 SUPPL STER 17 417-GY

L33
408-WH

409-OR
403-GN
470-PU
201-BK

7G9730 7G9730 200-BK PANEL, DOME, BLK 5 18

515-GY-14
STOP 109-OR STOP & TAIL BLU 4 ALARM 410-WH T¡
516-GN-14 10

200-BK

200-BK
601-GY

601-GY
LAMP SW W LAMP BREAKER GRN 3
112-PU-8 112-PU-14 517-BU-14 LAMP 11 411-PK
D 2M9346 MAIN 9G9882 OR
TEST 415-GN 4
W 200-BK-14 15
Q RELAY

L24
1
2
3

60 101-RD-14 10 103-YL W 201-BK 7

200-BK
3T0376 W 3

L34
L3
RD
PU

ALT
BK

101-RD-14 W 2
BREAKER

109-OR-4
109-OR-8
109-OR-8
101-RD-10 ACTION LAMP 6

200-BK-14

L3
15

103-YL
HEAD LAMP 9S0174 W W HEAD LAMP (TRACTOR) 1
411-PK

200-BK
200-BK
112-PU-10
FUSE BLOCK BASE

101-RD-4
DIMMER SW AIR SW ATCH BREAKER 7N1996 201-BK 5
604-OR

101-RD-10
9G0747 3T0304
103-YL

2H1855 8T9792 9S4693 3T2662 W

415-GN X D
D 201-BK 410-WH
W W

200-BK
BAT

165-YL
10A SOLENOIDS 165-YL 201-BK 201-BK
Q START 125-OR-14 W
611-PU-14 10A FUEL PUMP 200-BK-8
RELAY W W
1
2

610-OR-14 10A REAR WIPER 119-PK 415-GN 1 RD 202-BK

D M 9F3099 W
324-BU 601-GY 10A SIDE FLOOD LAMPS W 2 BK

601-GY

601-GY

601-GY
L4

AIR PRESS OPERATOR MON COMPARTMENT

2
1

200-BK
601-GY
CONV RETR TEMP COOLANT TEMP 304-WH 10A FLOOD LAMPS & GAGES 123-WH ACTION ALARM
D

200-BK-8
D GAGE TEST SW GROUND

200-BK
DIFFERENTIAL GAGE (TRACTOR) GAGE (TRACTOR) 304-WH-8 10A FRONT WIPER 118-GY 123-WH (TRACTOR)

200-BK
200-BK
1W3306 4W0485 4W0483 10A OPERATOR MONITOR 7N8001 TACH
9G9813

200-BK-14
LOCK SW 8T9711
200-BK 200-BK 10A TRANSMISSION W 423-PU LAMP

123-WH
123-WH
123-WH

123-WH
3T3132 200-BK

101-RD
W 10A AIR DRYER 204-BK 5D0019 W Y

102-BU-14
304-WH-8
W

101-RD
109-OR-4
OPERATOR STATION

101-RD-4
GRD GRD 10A BACKUP ALARM 204-BK 421-BU 118-GY 3

310-PU
123-WH
114-GN
113-OR
118-GY
W

103-YL
119-PK
W W

117-YL

L18
204-BK 422-YL + - 500-BR 4

125-OR-14
408-WH

306-GN

122-BU
322-GY

126-PK
307-OR
200-BK
200-BK
200-BK

200-BK
200-BK
126-PK
L18
165-YL
165-YL
201-BK

SEND SEND

L27
D W 501-GN 1

121-YL

165-YL
MOTOR W W 10A HORN 2 SIG 502-OR 2

608-GN
123-WH
IGN IGN W
LAMP

L17
FUSE FUSE BLOCK 1

444-BU

441-OR
5D0019 LAMP LAMP 451-BR 200-BK
3K8782 2S3747 W

601-GY
FRONT 5D0019 5D0019 450-YL
WASHER 602-WH
W 123-WH
200-BK
200-BK
L9

7T8891

L35

L36
3 123-WH 123-WH 125-OR-14 503-BR 3

L22

L33
L15
L35
D 2 123-WH 504-YL 7
L21

L36
MOTOR 4 441-OR 505-BU 5
D 1 444-BU 126-PK 202-BK 202-BK 202-BK 119-PK 4 D
L29 L29
123-WH 602-WH 2
200-BK
200-BK

REAR

L16
445-GN 608-GN 200-BK 6 ABBREV COLOR
507-WH
506-PU

WASHER

OPERATOR STATION
7T8891 L33 200-BK 601-GY 103-YL 1
L33 L28 L28
W Z RD RED
409-OR

L34
L34 L27 WH WHITE
403-GN OR ORANGE

L27
470-PU 103-YL YL YELLOW
L5 L31 L22 L22
200-BK PK PINK
L16
L10 L23 L23 BK BLACK
L10 200-BK
L26 L26 GY GRAY
202-BK 200-BK 200-BK PU PURPLE
L9

L9 200-BK 200-BK 200-BK-14 BR BROWN

L4 L4 200-BK 200-BK 200-BK W GN GREEN
L26 L25 L25
L32

202-BK 200-BK 200-BK BU BLUE

L32 L15
126-PK 200-BK
L31 L28 L27 L25 L23

L22

L21

L20
L24

L19
L5 201-BK 310-PU L15 200-BK SYMBOL DESCRIPTION
200-BK
BLADE, SPADE, RING,

L29
200-BK

507-WH
445-GN

608-GN
423-PU

506-PU
202-BK

204-BK
743-PU

421-BU
L5

417-GY
422-YL
202-BK

200-BK

201-BK
321-BR
708-YL
OR SCREW TERMINAL

712-WH-18
715-GN-18

713-OR-18

470-PU-18
716-BU-18

711-BR-18
714-YL-18
W W
CIRCUIT CONNECTED

7
1
25
22

20

24
21

23

13
8

6
5

4
2
3

10
9

18

19

14
17
16
15

12
11
3
5
4
1
2
W D A
200-BK

9
30
21
33
19
18
14
32
22
10
23
7
2
29
31
25
26
11
13
12
16
15
20
27
4
5
1
3
8
34
24
6
17
28
36
37
35
CIRCUIT NOT CONNECTED

400-GN

403-GN
405-GY
304-WH-8

444-BU
441-OR

406-PU
200-BK-8
302-OR

413-BR

412-BU
310-PU
109-OR-4

451-BR
200-BK-14

450-YL
516-GN-14

207-BK

407-PK

610-OR-14
619-GN-14
201-BK
311-WH
515-GY-14
521-YL-14

125-OR-14

101-RD-4
517-BU-14
WW D

6
9
5
4
3
2
1
8

7
10
14
13
12
11
ELECTRICAL CONNECTION
200-BK 200-BK D TO VEHICLE STRUCTURE

470-PU
712-WH
200-BK 200-BK

715-GN

713-OR
202-BK

200-BK
716-BU
INTERNAL ELECTRICAL

408-WH
321-BR
708-YL

711-BR
714-YL

322-GY
203-BK

202-BK
614-PU

122-BU
126-PK

417-GY
609-YL

103-YL
419-YL

165-YL
201-BK
200-BK 200-BK CONNECTION TO SURFACE

323-WH
608-GN
608-GN
200-BK
121-YL
200-BK 517-BU-14 OF COMPONENT

507-WH
506-PU

L1
470-PU 515-GY-14 CONNECTOR

L2
C 521-YL-14 C

L3

L3
T ATCH WIRE, CABLE &

L10
200-BK-14
L10 COMPONENT
639-WH 3 WH LEFT LAMP 516-GN-14

L9

L9
LEFT T 640-GN 4 GN RIGHT LAMP STOP/TAIL 522-WH-14

L6
STOP/TAIL 639-WH 604-OR 1 OR STOP IN LAMP CONTROL 513-OR-14

L5
LAMP 614-PU 2 PU TAIL IN 7X1670 126-PK 513-OR-14 A
6
7X6220
200-BK 7 522-WH-14 513-OR-14 2 GN-14
5 323-WH 522-WH-14 1 GN-14
L4 L4
4 311-WH
202-BK 3 310-PU A/C CLUTCH

L5
L5 SOLENOID
604-OR 1 610-OR-14
T R L32 L32 7T8600 IDENT PART NO. CHG LOC NOTE
103-YL 2 619-GN-14
604-OR 2 604-OR 5 604-OR 5 5 604-OR D A
614-PU 1 614-PU 4 614-PU 4 4 614-PU 610-OR-14 D B HARNESS AS.
E R L4 A 8W7413 01 C-3
321-BR 1 321-BR 1 1 321-BR 611-PU-14 2
BACKUP BK-14 2 321-BR 121-YL 2 121-YL 2 2 121-YL 202-BK 3 B 5T5218 03 C-2
L6 L6 D 8X2348 00 C-5
ALARM BK/PK-14 1 121-YL 200-BK 3 323-WH 3 3 323-WH 6
3T1815 323-WH 6 200-BK 6 6 200-BK 4 F 8W3628 00 B-4

619-GN-14
G 5T1632 00 F-4

611-PU-14
R P 7 7 608-GN 201-BK 5
122-BU 1 M 5T1635 05 D-7
P N N D

609-YL
608-GN 203-BK 7 N 5T1527 03 C-7
P 5T1563 05 C-7 C
(NOTE D) L2 L2 P 2T1878 01 C-7 D

311-WH
203-BK

310-PU
122-BU
L32 Q 5T1561 01 E-8
2
323-WH
200-BK

RESISTOR B R 5T1639 02 C-7 C

604-OR 5 1 608-GN

L1
RR (NOTE D) 6T2217 L1 R 2T1910 01 C-7 D
614-PU 4 P RR
321-BR 1 T 8X2982 00 A-9 C

722-WH

704-GY
703-BU
608-GN

725-GN

723-OR

709-OR
710-GN
726-BU

417-GY
202-BK

721-BR

419-YL
201-BK
724-YL
R T ------ -- A-9 D
121-YL 2
V 7T3418 03 B-5
1
2

323-WH 3 323-WH 2 323-WH 403-GN

302-OR
L2
200-BK 6 125-OR 1 125-OR-14 SIDE FLOOD W 8X2296 00 C-5
BOWL D D LAMP X 8C4764 01 E-1

2
1
7 AAA A

109-OR-4
A ALTERNATOR 7T9094

8
7
6
5
4
3
2
1
9
10
FLOOD Y 6G9985 01 D-1

1
2
3
4
5
P N
FUEL LAMP CCC CCC 5S9088 STD Z 6G9986 04 D-1
608-GN

304-WH-8
PUMP 7T9094 8N0999 ATCH

101-RD-4
P (NOTE C) B PP 5T9895 00 E-4
1W4279 WW 8W2179 02 C-5
B STARTER A ALT B

301-BU
AAA ENGINE OIL SW + R XX 5T0996 02 F-4

406-PU
6N1889 STD 6T7663 AAA 8W2208 00 B-3
MOTOR 3T8947 ATCH
200-BK CCC 8X2114 01 B-5
BOWL G S LO BEAM
FLOOD A HEAD LAMP WIRE AS.
400-GN

BK-6
LAMP MTR BAT CC 9W0051 C 8X2006 00 A-2
7T9094 CCC E 9G6259 02 C-9
COOLANT SW

200-BK-8
QQ B JJ 9F4337 07 A-3

405-GY
200-BK

413-BR
MOTOR 7N9785

L1
207-BK

407-PK
201-BK
TRANSMISSION
START AID SWITCH KK 6G5258 03 A-2
A QQ 2W8662 00 B-2 STD

619-GN-14
A QQ 2W8715 00 B-2 ATCH

611-PU-14
609-YL
T¡ RR 2T3125 00 B-7 D
CUTTING BK-00 ENGINE OIL SW

201-BK
W/O STEERING SW 6T7663 HI BEAM
EDGE

444-BU
441-OR
A

417-GY
201-BK
CONNECT PLUG F TO ZZ 405-GY HEAD LAMP CABLE AS.
FLOOD

419-YL
201-BK
RECEPTACLE F 9W0052 AA 8X1993 00 A-3
LAMP COOLANT SENDER
TO BB 9G0549 01 A-3

722-WH
725-GN

723-OR
7T9094

726-BU

BK-6
202-BK
6N5926

721-BR
724-YL
CCC CCC FRAME B CC 8X1994 00 A-3
201-BK

RD-00
BK-00
CCC

2
1
EE 9S9312 02 A-3

2
1

1
2
F F JJ KK

TRANSMISSION
A SS 8W1059 01 A-3
1
2
3
CCC T¡

RD-00
BK-00
ZZ 2G4177 00 B-3

200-BK

311-WH
G
H

A
E

B
TO ENG B

F
J
I
V BLOCK CONV RETR SW
RD
BU
BK

COOLANT
(TRACTOR) SW
7N9560 8N1693
A

722-WH-18
201-BK 201-BK 413-BR

725-GN-18

723-OR-18
726-BU-18
202-BK-18
A

721-BR-18
724-YL-18
EE A FUEL SW HI BEAM
WIRES THAT HAVE BATTERY VOLTAGE PANEL LAMP CIRCUIT.

412-BU
201-BK
T¡ 9W3187 HEAD LAMP
WHEN THE KEY SWITCH IS OFF. PARKING
AUX START T 9W0052
WIPER/WASHER CIRCUIT. RECEPTACLE 407-PK

417-GY
201-BK
BRAKE SW
WIRES THAT HAVE BATTERY VOLTAGE

122-BU
8T9792 V A B
WHEN THE KEY SWITCH IS ON. HEATER AND AIR CONDITIONER CIRCUIT.
4
5
9
10
1
2
3
6
7
8

2
1
DISCONNECT SW CONV RETR SENDER AIR DRYER
F SS 7N0718 (TRACTOR) 2G2159
TACHOMETER A

709-OR
710-GN
202-BK
STARTING CIRCUIT. GROUND CIRCUIT. GND VERIFY 6N5926 THIS SCHEMATIC IS FOR THE 621E/623E WHEEL

1
2
SENDER 450-YL
TRACTOR SCRAPER ( 9X4944 CHG 00 )
A 7T6945 451-BR T LO BEAM A
GROUND

RIGHT T GAUGE CIRCUIT. START AID CIRCUIT. A

GEAR 5
GEAR 4
GEAR 3
GEAR 2
GEAR 1
HEAD LAMP

704-GY
703-BU
T¡

202-BK

202-BK
STOP/TAIL COMPONENTS ARE SHOWN INSTALLED ON A FULLY

203-BK
640-GN C 9W0051
COOLANT SW

311-WH
310-PU
LAMP TRANSMISSION CONTROL CIRCUIT. CCC OPERABLE MACHINE WITH THE KEY AND ENGINE OFF
EMS CIRCUIT. 203-BK

BK
BK
9W2343

BK-00
7X6220 AND XMSN SHIFTER IN NEUTRAL

C
B
A
BK-18
B
TRANSMISSION SW CCC CCC START AID B UNLESS OTHERWISE SPECIFIED: ALL WIRES IN A SPLICE
ALL DASHED LINES ARE ATTACHMENTS. BK-00 RD-00
CC SOLENOID

2
1
(TRACTOR) AA BB ARE THE SAME IDENT. NUMBER, COLOR AND 16 GAGE

2
1

2
1
BK-00 BK-18
9G4365

GROUND
9W1409 NEG POS NEG POS AA BB BB CC
SIGNAL NEG POS NEG POS 1 BK-18
203-BK
2 BK-18 SIDE FLOOD UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 16 GAGE
+V

STEERING SW 12V BATTERY 12V BATTERY LAMP NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGE
3T5760 3T5760 C B 7T9094
TRANSMISSION UP SHIFT DOWN SHIFT 7T2078 12V BATTERY 12V BATTERY NOTE B: NORMALLY CLOSED WHEN DOOR OPEN
SPEED SENDER SOLENOID SOLENOID 3T5760 3T5760 NOTE C: FOR THE 621E ONLY
7T6337 9P0222 9P0222 BK-00 NOTE D: FOR THE 623E ONLY

9 8 7 6 5 4 3 2 1