637E SERIES II WHEEL TRACTOR-SCRAPER ELECTRICAL SYSTEM

SENR6374
July 1993
637E Series II
Electrical System
Tractor:
1FB532-UP
Scraper:
7CB1-UP
1HB1-UP
Wheel Tractor-Scraper
©
1993 Caterpillar
All Rights Reserved
Printed in U.S.A.
Component Location
Machine
Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Component
Location
A
Alarm (Sc) - Action (EMS)
D-3 17
Receptacle (Sc) - Auxiliary Start
A-6 49
Switch (Sc) - Transmission
B-8
A
Alarm (Tr) - Action (EMS)
D-3 18
Receptacle (Tr) - Auxiliary Start
A-3 50
Switch (Tr) - Air System Press (EMS)
E-8
1
Alarm - Backup
C-9 19
Relay (Sc) - Start
A-8 51
Switch (Tr) - Converter/Retarder Temp (EMS)
A-3
2
Alternator (Sc)
B-7 C
Relay (Tr) - Start
E-5 52
Switch (Tr) - Disconnect
A-3
3
Alternator (Tr)
B-2 C
Relay - Main
E-5 53
Switch (Tr) - Engine Coolant Flow (EMS)
A-2
4
Batteries (Sc)
A-6 20
Resistor (Key Start Sw - Sc)
A-5 54
Switch (Tr) - Engine Coolant Temp (EMS)
B-3
5
Batteries (Tr)
A-3 21
Resistor (Disconnect to Diagnostic Conn - Tr)
A-3 55
Switch (Tr) - Engine Coolant Temp (Start Aid)
A-2
C
Block - Fuse
D-4 22
Resistor (Starter to Diagnostic Conn - Sc)
A-6 56
Switch (Tr) - Engine Oil Press (EMS)
A-2
E
Breaker (Sc) - Alternator (40 Amp)
A-7 23
Resistor (Starter to Diagnostic Conn - Tr)
B-3 57
Switch (Tr) - Engine Oil Press (Sc Fuel Pump)
B-3
E
Breaker (Sc) - Key (10 Amp)
A-7 D
Resistor - Blower Motor Speed
E-1 59
Switch (Tr) - Fuel Press (EMS)
A-2
C
Breaker (Tr) - Alternator (80 Amp)
E-5 A
Resistor - Panel Dimmer
F-3 B
Switch (Tr) - Key Start
E-4
C
Breaker (Tr) - Key (10 Amp)
E-5 24
Sender (Sc) - Converter Temp (Gauge)
B-6 A
Switch (Tr) - Operator Monitor Test (EMS)
E-3
C
Breaker - Blower Motor (15 Amp)
E-4 25
Sender (Tr) - Converter Retarder Temp (Gauge)
A-3 60
Switch (Tr) - Parking Brake Press (EMS)
B-5
C
Breaker - Head Lamp (15 Amp)
E-4 26
Sender (Tr) - Engine Coolant Temp (Gauge)
A-3 A
Switch (Tr) - Start Aid
F-5
C
Breaker - Panel, Dome, Stop & Tail Lamp (1 0A)
E-4 27
Sender - Tachometer
A-2 61
Switch (Tr) - Steering Flow (EMS)
A-4
6
Control (Sc) - Neutral/Start
B-B 28
Sender - Transmission Speed
A-4 62
Switch (Tr) - Transmission
A-4
7
Control (Sc) - Transmission Switching
D-9 29
Solenoid (Sc) - Down Shift
A-8 B
Switch - Apron
E-7
B
Control (Tr) - Neutral/Start
E-6 30
Solenoid (Sc) - Start Aid
A-7 B
Switch - Auger
E-7
8
Control (Tr) - Transmission
F-9 31
Solenoid (Sc) - Sync
A-9 B
Switch - Backup Alarm
F-6
9
Dryer - Air
A-2 32
Solenoid (Sc) - Up Shift
A-8 B
Switch - Blower
E-3
B
Gauge - Engine Coolant Temp
D-6 33
Solenoid (Tr) - Down Shift
A-4 D
Switch - Differential Lock
D-9
B
Gauge - (Sc) Converter Retarder Temp
D-6 35
Solenoid (Tr) - Start Aid
A-2 D
Switch - Dome Lamp
F-6
B
Gauge - (Tr) Converter Retarder Temp
D-6 36
Solenoid (Tr) - Up Shift
A-4 D
Switch - Door Dome Lamp
F-5
E
Lamp (Sc) - Action (EMS)
B-9 37
Solenoid - Air Conditioner Clutch
C-1 A
Switch - Flood Lamp
E-3
A
Lamp (Tr) - Action (EMS)
E-3 38
Solenoid - Apron
E-7 A
Switch - Forward Horn
F-5
A
Lamp (Tr) - Action (Sc EMS)
D-3 39
Solenoid - Differential Lock
E-8 A
Switch - Front Wiper
F-3
E
Meter (Sc) - Service
A-9 40
Solenoid - Forward Horn
E-8 D
Switch - Head Lamp Dimmer
E-9
C
Meter (Tr) - Service
E-6 41
Switch (Sc) - Converter Temp (EMS)
B-6 B
Switch - Hold
F-7
E
Monitor (Sc) - Operator (EMS)
B-9 42
Switch (Sc) - Disconnect
A-6 A
Switch - Neutral/Run
F-5
A
Monitor (Tr) - Operator (EMS)
E-3 43
Switch (Sc) - Engine Coolant Flow (EMS)
B-7 A
Switch - Panel Dimmer
F-3
10
Motor (Sc) - Starter
A-6 44
Switch (Sc) - Engine Coolant Temp (EMS)
B-6 A
Switch - Rear Wiper
F-3
11
Motor (Tr) - Starter
B-3 45
Switch (Sc) - Engine Coolant Temp (Start Aid)
B-6 63
Switch - Refrigerant
E-1
12
Motor - Front Washer
D-9 46
Switch (Sc) - Engine Oil Press (EMS)
B-6 A
Switch - Running Lamp
F-4
13
Motor - Front Wiper
F-2 48
Switch (Sc) - Fuel Press (EMS)
B-7 B
Switch - Shift Lever
F-7
14
Motor - Fuel Pump
B-5 E
Switch (Sc) - Instrument
A-9 A
Switch - Side Flood Lamp
F-4
15
Motor - Rear Washer
D-9 E
Switch (Sc) - Key Start
A-9 64
Switch - Stop Lamp Air Press
E-8
16
Motor - Rear Wiper
F-6 E
Switch (Sc) - Operator Monitor Test (EMS)
B-9 B
Switch - Thermostat (Air Conditioner)
E-1
D
Motors - Blower
F-2 E
Switch (Sc) - Start Aid
A-9 A
Tachometer
D-2
Sc = Scraper
Tr = Tractor
A = Operator Compartment - Front Dash
B = Operator Compartment - Right Console
C = Operator Compartment - Left Console
D = Operator Compartment
E = Scraper Dash Panel
Related Electrical Service Manuals
Form Number
Alternator (Tr); 8N-0999
Alternator (Sc); 6N-9294
SENR7507
SENR4130
Electronic Monitoring System
SENR2945
Electronic Neutral Start Control
SENR3889
Starting And Charging Systems
SENR2947
Starting Motor (Tr); 3T-8967
Starting Motor (Sc); 4N-3181
SENR3860
SENR3581
Title
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
2M-9346 Stop Lamp Pressure
45.0 kPa Max
(6.5 psi MAX)
5 kPa MIN
(0.5 psi MIN)
Normally Open
6T-7663 Engine Oil Pressure
93.0 ± 21.0 kPa
(13.5 ± 3.0 psi)
69.0 ± 21.0 kPa
(10.0 ± 3.0 psi)
Normally Open
7N-9560 Converter/Retarder Temp (EMS)
129.0 ± 3.0°C
(265.0 ± 5°F)
118.0°C MIN
(245.0°F MIN)
Normally Closed
7N-9785 Engine Coolant Temp (EMS)
107.0 ± 3.0°C
(225.0 ± 5°F)
91.0°C MIN
(196.0°F MIN)
Normally Closed
7T-0988 Engine Oil Pressure
62.0 ± 21.0 kPa
(9.0 ± 3.0 psi)
38.0 ± 21.0 kPa
(5.0 ± 3.0 psi)
Normally Open
8N-1693 Engine Coolant Temp (St Aid)
38.0 ± 3.0°C
(100.0 ± 5.0°F)
27.0°C MIN
(80.0°F MIN)
Normally Closed
8T-9792 Parking Brake Pressure (EMS)
517.0 ± 35.0 kPa
(75.0 ± 5.0 psi)
448.0 ± 35.0 kPa
(65.0 ± 5.0 psi)
1-2, Normally Open
1-3, Normally Closed
9W-3187 Fuel Pressure (EMS)
93.0 ± 21.0 kPa
(13.5 ± 3.0 psi)
69.0 ± 21.0 kPa
(10.0 ± 3.0 psi)
Normally Closed
9X-1159 Steering Flow (EMS)
4 grams
(.14 oz)
1.5 grams
(.05 oz)
Normally Open
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
9G-1950 Resistor - Blower Motor Speed
Over-all; 2.0 ± 0.1
Tap; 1.00±05
3T-3123 Resistor - Panel Dimmer 25.0 ± 0.25
7X-6416 Resistor - Power 50.0 ± 5.00
6T-2217 Resistor - Starter/Diagnostic 150.0 ± 7.5
7T-8600 Solenoid - A/C Clutch 14.4 ± 0.6
7N-9719 Solenoid - Apron, Diff Lock 68.0
6T-9290 Solenoid - Down Shift/Up Shift/Sync 26.0 ± 2.0
7T-9074 Solenoid - Forward Horn 55.0 ± 6.0
7N-7259 Solenoid - Start Aid (Tr) 6.0
9G-4365 Solenoid - Start Aid (Sc) 6.0
¹ At room temperature unless otherwise noted.
A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
18
19
20
21
22
23
24
63
25
26
27
28
29
30
31
32
37
35
33
36
38
7
39
40
41
42
43
44
45
46
48
17
18
19
20
21
22
23
24
36
25
34
26
27
28
29
30
33
31
35
32
49
60
61
62
64
50
57
51
52
53
54
55
56
59
A
1
36
35
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
3
4
5
6
9
18
16
8
10
11
12
14
15
13
B
C
D
E
1
2
17
19
20
21
22
23
24
25
26
27
28
29
30
31
32
37
35
33
36
38
7
39
40
41
42
43
44
45
46
48
17
18
19
20
21
22
23
24
25
26
27
33
34
28
29
30
31
32
49
62
60
61
57
50
51
64
63
52
53
54
55
56
59
MACHINE HARNESS CONNECTOR AND COMPONENT LOCATIONS
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Circuits
Accessory Circuits
101 RD
BAT
500 BR
WIPER - FRONT (PARK)
102 BU
HD LMP
501 GN
WIPER - FRONT (LO)
103 YL
AUX CKT
502 OR
WIPER - FRONT (HI)
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)
113 OR
OPR MON PANEL
506 PU
WASHER - FRONT
114 GN
WARNING HORN (FORWARD)
507 WH
WASHER - REAR
117 YL
AUX CKT
513 OR
A/C COMPRESSOR/REFRIGERANT PRESS. SW
118 GY
AUX CKT
515 GY
BLOWER MOTOR (HI)
119 PK
AUX CKT
516 GN
BLOWER MOTOR (MEDIUM)
121 YL
BACKUP ALARM TO LAMP
517 BU
BLOWER MOTOR (LO)
122 BU
AUX CKT
521 YL
A/C SW TO REFRIGERANT SW
123 WH
AUX CKT
522 WH
A/C CLUTCH TO THERMOSTAT SW
124 GN
A/C
Lighting Circuits
125 OR
AUX CKT
600
BR DASH LAMP BASIC
126 PK
XMSN CONT
601
GY DASH LAMP HI
165 YL
AUX CKT
602
WH DOME LAMP
Ground Circuits
604
OR STOP LAMP
200 BK
MAIN CHASSIS
608
GN FLOOD LAMP - REAR
201 BK
OPR MON PANEL
609
YL FLOOD LAMP - SIDE
202 BK
XMSN CONT
610
OR HEAD LAMP BASIC
203 BK
CHASSIS DIAGNOSTIC
611
PU HEAD LAMP HI
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
301 BU
STARTER NO. 1 SOL
703 BU
XMSN UP SOL
302 OR
STARTER NO. 1 RESISTOR TO DIAGNOSTIC
704 GY
XMSN DOWN SOL
304 WH
STARTER RELAY NO. 1 OUTPUT
708 YL
XMSN HOLD SW
306 GN
STARTER RELAY COIL TO NEUT START SW OR
KEY SW
709 OR SENSOR POWER SUPPLY
307 OR
KEY SW TO NEUT START SW
710 GN
XMSN SPEED PICKUP SIGNAL
308 YL
MAIN POWER RELAY COIL
711 BR
XMSN LEVER CODE 1
310 PU
START AID SW TO START AID SOL
712 WH
XMSN LEVER CODE 2
311 WH
START AID SOL TO TEMP SW
713 OR
XMSN LEVER CODE 3
321 BR
BCKP ALARM LAMP TRAVEL ALARM
714 YL
XMSN LEVER CODE 4
322 GY
WARNING HORN (FORWARD)
715 GN
XMSN LEVER CODE 5
323 WH
FUEL PUMP POWER
716 BU
XMSN LEVER CODE 6
324 BU
DIFF LOCK SOL
717 BR
BOWL APRON SOL FLOAT/VCTC SOL
Monitoring Circuits
721 BR
XMSN GEAR CODE 1
400 GN
SERVICE METER SW
722 WH
XMSN GEAR CODE 2
403 GN
ALTERNATOR (R) TERM.
723 OR
XMSN GEAR CODE 3
405 GY
OPR MON OIL PRESS. (LO SETTING)
724 YL
XMSN GEAR CODE 4
406 PU
OPR MON COOLANT TEMP
725 GN
XMSN GEAR CODE 5
407 PK
OPR MON CONVERTER/RETARDER OIL TEMP
726 BU
XMSN GEAR CODE 6
408 WH
OPR MON SYSTEM AIR PRESS.
733 BR
SWITCHING GEAR CODE 1 FRONT
409 OR
OPR MON NEUT
734 WH
SWITCHING GEAR CODE 2 FRONT
410 WH
OPR MON ACTION ALARM
735 OR
SWITCHING GEAR CODE 3 FRONT
411 PK
OPR MON ACTION LAMP
736 YL
SWITCHING GEAR CODE 4 FRONT
412 BU
OPR MON COOLANT FLOW
737 GN
SWITCHING GEAR CODE 5 FRONT
413 BR
OPR MON FUEL PRESS.
738 BR
SWITCHING GEAR CODE 1 REAR
415 GN
OPR MON TEST SW
739 WH
SWITCHING GEAR CODE 2 REAR
417 GY
PRIMARY STER SW
740 OR
SWITCHING GEAR CODE 3 REAR
419 YL
OPR MON PARKING BRAKE
741 YL
SWITCHING GEAR CODE 4 REAR
421 BU
OPR MON ACTION LAMP (SCRAPER)
742 GN
SWITCHING GEAR CODE 5 REAR
422 YL
OPR MON ACTION ALARM (SCRAPER)
743 PU
SWITCHING NEUT/RUN SW
423 PU
OPR MON TEST SW (SCRAPER)
744 BU
SWITCHING UP SOL
441 OR
ENG COOLANT TEMP GAGE
745 GY
SWITCHING DOWN SOL
444 BU
CONVERTER/RETARDER OIL TEMP GAGE
746 PK
SWITCHING SYNCHRONIZE SOL
445 GN
CONVERTER/RETARDER OIL TEMP GAGE
(SCRAPER)
747 WH SWITCHING NO SYNCHRONIZE SOL
450 YL
TACH SENDER (+)
781 PK
AUGER BUFFER BOX TO NEUT START CONT
451 BR
TACH SENDER (-)
787 WH
AUGER BUFFER BOX
470 PU
CANE SW NEUT
895 BR
AUGER BUFFER BOX TO NEUT START CONT
A417 WH
OPR MON SCRAPER XMSN
896 GN
AUGER BUFFER BOX TO AEM RESISTOR
T
Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
Normally open switch that is closed due to an applied condition, and will open again with a
specific decrease in that condition.
Normally closed switch that will open with an increase of a specific condition.
Normally closed switch that is open due to an applied condition, and will close again
with a specific decrease in that condition.
The circle indicates that the component has screw terminals and a wire can be disconnected
from it.
No circle indicates that the wire cannot be disconnected from the component.
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.
Electrical Schematic Symbols And Definitions
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
A AA
2
A AA
1
2
325-PK-14
C
A
325-PK-14
200-BK-14
T
FUSE - A component in an electrical circuit that will open the circuit if too much current flows
through 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.
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.
Harness And Wire Electrical Schematic Symbols
Socket
Pin
Pin or Socket
Number
Wire, Cable, or Harness
Assembly Identification
Single Wire
Connector
Circuit Number
Identification
Wire
Gauge
Wire
Color
Plug
Receptacle
9X-1123
Component
Part Number
Electrical Schematic Symbols And Definitions
1
1
1
2
2
Typical representation of a
Sure-Seal connector. The
plugand receptacle contain
both pins and sockets.
Typical representation of a
Deutsch connector. The
plug contains all sockets
and the receptacle contains
all pins.
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.
Connector Location
Connector
Machine
Location
Harness And/Or
Components
Schematic
Location
Connector
Machine
Location
Harness And/Or
Components
Schematic
Location
D - 8X7442
Transmission Control
F-9
BBB - 8X0549
Neutral/Start Control (Tr)
E-6
D - 8X7442
W - 8X2296
C-4
L - 8X2252
Neutral/Start Control (Sc)
B-8
A - 8X1057
W - 8X2296
C-2
W - 8X2296
BBB - 8X0549
E-6
S- 8X2254
T - 8X2253
A-7 8Contacts
A - 8X1057
D - 8X7442
C-3
D - 8X7442
H - 5T1523
C-7
D - 8X7442
N - 5T1527
C-7
H - 5T1523
J - 5T1 569 (*)
C-7
D - 8X7442
X - 8C4764
E-1
J-5T1569 (*)
L-8X2252
C-7
N-5T1527
P-8W5219(**)
C-7
L - 8X2252
Transmission Switching Control
D-9
U - 6T4958
Transmission Switch (Sc)
B-8
S - 8X2254
Diagnostic Conn (Sc)
A-7
W - 8X2296
Z - 6G9986
D-1
S - 8X2254
Operator Monitor
B-9
A - 8X1057
B - 8W3936
C-2
W - 8X2296
Diagnostic Conn (Tr)
E-5
P - 8W5219 (**)
R - 5T1558
C-7
W - 8X2296
Operator Monitor(Tr EMS)
E-3 5 Contacts
D-8X7442
W-8X2296
C-3
14 Contacts
D-8X7442
WW-8W2179
C-5
G-5T1632
W-8X2296
F-4
D - 8X7442
V - 7T3418
B-4
R - 5T1558
T - 8X2253
B-8
L-8X2252
T-8X2253
B-8
W - 8X2296
V - 6G9985
D-1
L-8X2252
U-6T4958
C-8
W - 8X2296
YY - 8W6011
D-6
V - 7T3418
Transmission Switch (Tr)
B-4
V - 6G9985
Front Wiper Motor
F-1
WW - 8W2179
Shift Lever Switch
F-7
Z - 6G9986
Rear Wiper Motor
F-6
9 Contacts
7 Contacts
6 Contacts
4 Contacts
37 Contacts
25 Contacts
20 Contacts
10 Contacts
*= For Coal Scrapers use Harness 5T6884.
**= For Coal Scrapers use Harness 8W5218.
Sc = Scraper
Tr = Tractor
1
2
3
4
5
6
7
9
8
10
11
12
13
14
20
15
16
17
35
36
32
34
28
29
30
27
26
25
24
22
21
19
18
23
31
33
T
T
T
T
T
1
2
2
1
1
2
4
3
2
1
7
8
6
2
F
E
D
9 8 7
C
B
A
9 8 7
6 5 4
6 5
4
3 2 1
F
E
D
3 2 1
C
B
A
2
1
6
2
3
8
5
515-GY-14
119-PK
1
4
4
1
109-OR-
8
S
2
3
4
1
5
7
2
1
200-BK
AIR SW
8T9792
D
408-WH
201-BK 201-BK
BU
RD
BK
403-GN
L14
419-YL
201-BK
D
BU
RD
3
1
2
W
W
403-GN
308-YL
S
S
S
S
S
S
S
204-BK
202-BK
403-GN
204-BK
S
200-BK-12
109-OR-8
S
S
200-BK-12
311-WH311-WH
608-GN
412-BU
413-BR
200-BK
202-BK
202-BK
126-PK
747-WH
202-BK
202-BK
202-BK
737-GN
735-OR
200-BK
200-BK
200-BK
200-BK
200-BK
L5
506-PU
200-BK
408-WH
Q
202-BK
202-BK
202-BK
202-BK
202-BK
202-BK
165-YL
M
M
717-BR
896-GN
708-YL
202-BK
YY
601-YL
L42
L31
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
L23
200-BK
200-BK
200-BK
200-BK
126-PK
L42
L42
L35
102-BU-14
103-YL
103-YL
103-YL
103-YL
123-WH
101-RD
W
W
601-GY
601-GY
L14
L14 L14
L14
L30
L
NOTE C: REPLACES STANDARD HARNESS ON COAL SCRAPER
L26
W
L26
L26
L16
L26
L16
L30
200-BK
602-WH
200-BK
Z
L16
Z
L30 L30
L30
103-YL
W
103-YL
614-PU
614-PU
609-YL
202-BK
743-PU
W
200-BK
602-WH
470-PU
608-GN
204-BK
203-BK
RD-00
RD-00
L
744-BU
L38
D
D
L36
D
202-BK
202-BK
202-BK
202-BK
L38
202-BK
202-BK
202-BK
202-BK
202-BK
202-BK
202-BK
202-BK
202-BK
202-BK
601-GY
601-GY
202-BK
601-GY
601-GY
601-GY
601-GY
601-GY
601-GY
601-GY
L40
L39
L4
L40
201-BK
201-BK
200-BK
201-BK
201-BK
L40
L39
L40
L37
L36
L41
202-BK
202-BK
202-BK
204-BK
204-BK
204-BK
204-BK
204-BK
204-BK
204-BK
L36
200-BK
200-BK
200-BK
200-BK
200-BK
L36
L41
L41
445-GN
608-GN
L30
L30
601-GY
123-WH
L39
L11
L10
L31
L31
L31
L32
L32
L11
L11
L11
L10
L10
L10
L4
L4
L5
L9L9
L12
L12 L12
L13L13
L13
L11
L11
L8
L8L8
L7
L6
L25
L27
L28
L29
L23
L23
L15
L15
L22
L22
L21
L34
L34 L34
L33
L33L33
L33
L16
L16L16
L16
L28
L17
L27
L28
L29
L32 L32
L32
L10
L10
L9
L9
L8
L7
L7
L6
L6
L5L5
L5
L5
L24
L24
L28
L19
L19
L18
L18
L35
L25
L29L29
L20
L20
L3
L3
201-BK
L25
L15
L16
L17L17
L17
L18
L18
L35
L24
L29
L27
L27
L21
L22
L23
L19
L20
L21
L22
L23
L24
L4
L3
L3
L2
L2L2
L2
L1
L1L1
L1
200-BK
742-GN
741-YL
740-OR
739-WH
738-BR
202-BK
109-OR-8
403-GN
204-BK
308-YL
RESISTOR
7X6416
308-YL
200-BK
109-OR
200-BK
BBB
601-GY
L38
601-GY
200-BK
200-BK
L23
411-PK
200-BK
601-GY
896-GN
787-WH
200-BK
781-PK
895-BR
781-PK
895-BR
AUGER SOL
AUGER SW
GROUND
NEUT/START
NEUT/START
PU-18
GY-18
YL-18
GN-18
WH-18
BK-18
PK-18
BR-18
9
BU-18
207-BK
W
W
PP
W
200-BK
B
WW
K
K
204-BK
T
T
T
T
P
200-BK
204-BK
204-BK
204-BK
204-BK
204-BK
204-BK
204-BK
204-BK
204-BK
203-BK
WW
WW
W
W
124-GN-14
W
W
W
310-PU
X
X
125-OR-14
STOP/TAIL
LAMP CONTROL
7X1670
1
31
32
33
34
35
28
21
22
23
24
25
26
3
4
9
10
2
8
7
6
20
17
18
19
11
12
13
14
15
TAIL
16
30
29
5
36
37
27
STOP
RIGHT
LEFT
614-PU
604-OR
640-GN
639-WH
AUGER SW
5V8690
2
1 787-WH
BK
RD/GN
BBB
BBB
1
2
E-6
614-PU
604-OR
640-GN
639-WH
8
1
4
2
3
T
MOTOR
L
H
1
3
2
4
OR
BR
GY
GN
123-WH
125-OR-14
202-BK
608-GN
415-GN
409-OR
103-YL
201-BK
122-BU
GN
GN
1
445-GN
200-BK
5T1553
JJ
D-6
ATCH WIRE, CABLE &
COMPONENT
5V7080
9G0549
B-75H0837MM
C-8
C-7
C-7
A-8
C-7
A-7
A-68W0323GG
A-64N6580HH
A-65T5529TT
FF
A-3/A-6
A-63S8624DD
BB
A-2 ATCH
2W8715
5R7755
8W6011YY
6T4958U
8X2254S
8X2252L
5T1569J
8X2943K
5T1523H
8C4764
8X2253
5T1558
8W5219
8X7442
8X1057
B-3
5T7362
9S9312
5T1528
8W2208AAA
8X2296
8W3628
CABLE AS.
G
2G4177
5T0996
8W2179
5T9895
7T3418
5T1561
5T1527
5T1635
5T1633
8W3936
2W8662QQ
A-2 STDQQ
B-4
C-99G6259
A-3
5T1632
E
B-3ZZ
A-3
F-4
A-3C
NOTE B: NORMALLY CLOSED WHEN DOOR OPEN
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF
AND XMSN SHIFTER IN NEUTRAL
E-8
CIRCUIT NOT CONNECTED
CIRCUIT CONNECTED
F-4
E-4
E-1
D-1
D-1
C-5
C-5
C-7
C-7
522-WH-14
513-OR-14
A-7
SS
B-5
C-5
C-2
C-3
LOC
6G9986
6G9985
XX
WW
6G5258
PP
KK
EE
CC
AA
WIRE AS.
HARNESS AS.
PART NO.IDENT
Z
Y
X
W
V
T
R
Q
P
N
M
F
D
B
A
NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGE
BLUE
GREEN
BU
GN
RD
WH
OR
YL
PK
BK
BLADE, SPADE, RING,
OR SCREW TERMINAL
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
ELECTRICAL CONNECTION
TO VEHICLE STRUCTURE
CONNECTOR
SYMBOL DESCRIPTION
BROWN
PURPLE
GRAY
BLACK
COLORABBREV
PINK
YELLOW
ORANGE
WHITE
RED
BR
PU
GY
UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 16 GAGE
CONV RETR TEMP
GAGE (TRACTOR)
4W0485
3
4
5
8
9
7
10
2
1
6
LEVER 1
LEVER 2
LEVER 3
LEVER 4
LEVER 5
NEUTRAL
GROUND
GND VERIFY
CONV RETR TEMP
GAGE (SCRAPER)
4W2063
FORWARD
HORN
SOLENOID
7T9074
W
W
470-PU
200-BK
FRONT GR 5
FRONT GR 4
FRONT GR 3
FRONT GR 2
FRONT GR 1
101-RD-8
304-WH-8
200-BK-12
423-PU
ID CODE 3
ID CODE 2
ID CODE 1
ID CODE 0
+10V
GND VERIFY
GND VERIFY
XMSN SP
GEAR 1
LEVER 5
LEVER 4
LEVER 3
LEVER 2
LEVER 1
HOLD SW
GROUND
DOWN SOL
UP SOL
GEAR 5
GEAR 4
GEAR 3
GEAR 2
+ BATTERY
00
01
00
02
00
02
02
01
01
01
01
00
00
05
03
00
00
00
00
02
02
00
04
01
01
01
03
02
01
01
02
01
00
01
03
05
01
A
02
03
04
00
00
02
00
02
01
D
2
A
1
CHG
322-GY
737-GN
736-YL
735-OR
734-WH
733-BR
YY
LAMP
5D0019
601-GY
123-WH
200-BK
IGN
SEND
GRD
200-BK
200-BK
409-OR
470-PU
306-GN
307-OR
200-BK
126-PK
506-PU
507-WH
REAR
WASHER
7T8891
FRONT
WASHER
7T8891
MOTOR
MOTOR
201-BK
LAMP
5D0019
LAMP
5D0019
LAMP
5D0019
BAT
TRANSMISSION CONTROL
3E3614
BASE
7G9730
BASE
7G9730
PANEL
LAMP
7N5876
PANEL
LAMP
7N5876
200-BK
200-BK
601-GY
601-GY
601-GY
601-GY
SERVICE
METER
6T7337
403-GN
200-BK
L14
APRON SW
2G3970
NEUTRAL/START
CONTROL
7X1362
200-BK
126-PK
307-OR
306-GN
409-OR
470-PU-18
OPR PANEL
NEUTRAL
BR-18
PK-18
GY-18
BU-18
YL-18
OR-18
9
8
7
6
3
BUFFER
BBBW/O HARNESS 'BBB'
CONNECT 9 PIN
CONNECTOR TO
NEUTRAL/START
CONTROL
GN-18
WH-18
+ BATTERY
START SW
GROUND
START RELAY
3
2
4
1
OR-18
PU-18
BK-18
GN-18
2
1
5
APRON
SOLENOID
7N9719
200-BK
D
M
1
2 200-BK
165-YL
200-BK
717-BR
200-BK
D
202-BK
202-BK
SHIFT
LEVER SW
9W0681
REAR
WIPER
6T6216
COOLANT TEMP
GAGE (TRACTOR)
4W0483
200-BK
601-GY
126-PK
AIR PRESS
GAGE
1W3306
FORWARD
HORN SW
3T2357
NC
NOC
200-BK
DOOR DOME
LAMP SW
NOTE B
3T3133
Z
STOP
LAMP SW
2M9346
200-BK
310-PU
602-WH
322-GY
START AID SW
3T3453
114-GN
119-PK
Q
D
2
1
604-OR
103-YL
GN
GY
BR
2
W
WW
WW
D
WH-18
BK-18
OR
4
408-WH
123-WH
3
4
HEAD LAMP
DIMMER SW
2H1855
OPERATOR STATION
OPERATOR STATION
610-OR-14
611-PU-14
601-GY
123-WH
123-WH
441-OR
444-BU
123-WH
123-WH
IGN
SEND
GRD
IGN
SEND
GRD
DOME
LAMP
7N8043
DOME
LAMP SW
8D2676
201-BK
322-GY
602-WH
200-BK
103-YL
602-WH
202-BK
716-BU
710-GN
709-OR
704-GY
703-BU
726-BU
725-GN
724-YL
723-OR
722-WH
721-BR
202-BK
715-GN
714-YL
713-OR
712-WH
711-BR
708-YL
BACKUP
ALARM SW
6G4195
505-BU
504-YL
503-BR
712-WH-18
713-OR-18
714-YL-18
715-GN-18
202-BK
716-BU-18
444-BU
441-OR
445-GN
403-GN
711-BR-18
321-BR
200-BK
200-BK
2
3
1
H
L
MOTOR
T
RD
BK
TACH
8T9711
65
4
32
1
ACTION ALARM
(SCRAPER)
9G9813
BASE
3T0304
ACTION
LAMP
(SCRAPER)
7N1996
OPERATOR MONITOR
TEST SW 7N8008
LAMP
5D0019
201-BK
204-BK
308-YL
L38
ACTION LAMP (TRACTOR)
7N1996
BASE
3T0304
ACTION ALARM
(TRACTOR)
9G9813
308-YL
6
7
5
9307-OR
126-PK
200-BK
470-PU
BBB
AUGER
8X0549BBB
422-YL
204-BK
L14
L14
W
503-BR
119-PK
W
500-BR
118-GY
324-BU
200-BK
DIFFERENTIAL
LOCK SOLENOID
7N9719
DIFFERENTIAL
LOCK SW
3T3132
324-BU
165-YL
165-YL
HOLD SW
8D2676
202-BK
708-YL
NEUT/RUN SW
8D2676
W
W
L26
W
W
201-BK
T
BK
RD
415-GN
410-WH
2
1
2
1
204-BK
422-YL
421-BU
204-BK
423-PU
411-PK
165-YL
601-GY
601-GY
123-WH
FUSE BLOCK
9G0747
FUSE BLOCK
2S3747
101-RD
101-RD
101-RD-10
101-RD-14
101-RD-14
101-RD-10
10A
165-YL
SOLENOIDS
123-WH
FLOOD LAMPS & GAGES
24
22
14
515-GY-14
200-BK-14
200-BK-14
521-YL-14
522-WH-14
307-OR
307-OR
THERMOSTAT SW
9X5445
200-BK-14
200-BK
200-BK
200-BK
200-BK
126-PK
200-BK
200-BK-14
200-BK-14
200-BK
200-BK
200-BK-8
PANEL, DOME,
STOP & TAIL
LAMP BREAKER
9G9882
117-YL
409-OR
470-PU
109-OR-4
109-OR-8
109-OR-8
112-PU-14
W
112-PU-8
112-PU-10
125-OR-14
FUEL PUMP10A
200-BK-8
REAR
WIPER SW
3T6655
FRONT
WIPER SW
3T6655
RD
RD
200-BK-14
601-GY
6
RESISTOR
9G1950
G
307-OR
306-GN
307-OR
AIR DRYER
304-WH
BLOWER SW
6P3236
3
4
5
2
1
516-GN-14
OR
GRN
BLU
BLK
RED
123-WH
123-WH
516-GN-14
T
521-YL-14
517-BU-14
200-BK-14
515-GY-14
124-GN-14
DIAGNOSTIC CONNECTOR
FRONT
WIPER
6T6216
MAIN
RELAY
3T0376
101-RD-4
109-OR-4
80
ALT
BREAKER
9S4693
ATCH
9S0174
PPW
2
1
200-BK
15
112-PU-14
124-GN-14
BLOWER
MOTOR
BREAKER
6N8589
202-BK
54
21
1
HEAD LAMP
BREAKER
3T2662
-+
SIG
614-PU 600-BR 601-GY
601-GY
601-GY
200-BK
W
SIDE FLOOD
LAMP SW
3T4405
619-GN-14
102-BU-14
4
3
2
1
117-YL
103-YL
614-PU
609-YL
REAR WIPER10A
D
OPERATOR
MONITOR
3T9100
Z
YW
2
3
4
119-PK
118-GY
RUNNING
LAMP
SW
3T3826
203-BK
609-YL
614-PU
614-PU
PANEL
DIMMER
RESISTOR
3T3123
PANEL
DIMMER SW
4D1836
103-YL
12
11
10
9
8
7
6
5
4
3
2
1
103-YL
117-YL
103-YL
117-YL
10A SIDE FLOOD LAMPS
HORN
FUSE
3K8782
118-GY
119-PK
B
W P
L
H
B
PANEL LAMP
7N5876
PANEL LAMP
7N5876
REFRIGERANT SW
NOTE A
9D6888
118-GY
409-OR
310-PU
Y
SUPPL STER
FUEL PR
COOL TEMP
COOL FLOW
AIR PR
ALARM
5
4
2
3
1
W
XX W
W
W
X
X X
W
W
W W
506-PU
507-WH
35
37
500-BR
501-GN
502-OR
201-BK
310-PU
34
33
31
29
27
9
30
21
20
32
18
19
10
23
7
2
25
26
11
13
12
16
15
5
1
3
8
36
28
6
17
4
BUFFER BOX
7X1193
165-YL
470-PU-18
200-BK
708-YL
321-BR
716-BU-18
W
201-BK
513-OR-14
BUFFER
7
500-BR
501-GN
502-OR
503-BR
504-YL
505-BU
602-WH
200-BK
103-YL
310-PU
322-GY
2
1
202-BK
743-PU
KEY
BREAKER
9G9487
PARK BK
NEUTRAL
OPERATOR STATIONOPERATOR STATION
OPERATOR MONITOR
20
19
18
17
16
15
14
13
6
7
4
3
2
1
5
201-BK
200-BK
304-WH-8
200-BK
506-PU
507-WH
608-GN
24
19
123-WH
START
RELAY
9F3099
406-PU
409-OR 9
18
4
14
6
20
BASE
9D8047
BASE 9D8047
WH/RD-14
WH/RD-14
BK-14
BK-14
25
8
18
BACKUP ALARM
3
2 1
TEST
LAMP
CONV TEMP
ENG OIL PR
ALTERNATOR
GROUND
+ BATTERY
10
15
2
1
2
1
2
1
5
4
3
2
1
KEY START SW
9G7641
FLOOD LAMP SW
8D2676
BLOWER
9G8697
BLOWER
9G8693
10
16
15
9
11
22
1
20
21
14
17
6
23
5
4
2
3
12
10
13
7
6
12
8
5
4
9
1
11
10
2
7
3
101-RD-4
101-RD
119-PK
118-GY
517-BU-14
200-BK-14
103-YL
610-OR-14
608-GN
308-YL
105-BR
102-BU-14
502-OR
501-GN
500-BR
113-OR
L35
114-GN
102-BU-14
118-GY 505-BU
504-YL
503-BR
15
11
10
17
2
7
5
13
12
3
16
8
19
1
304-WH-8
112-PU
308-YL
304-WH
109-OR
105-BR
311-WH
310-PU
302-OR
207-BK
415-GN
411-PK
410-WH
417-GY
201-BK
407-PK
405-GY
413-BR
412-BU
403-GN
201-BK
408-WH
419-YL
113-OR
FRONT WIPER
TRANSMISSION
10A
10A
10A
10A
10A
10A
10A
118-GY
114-GN
113-OR
W
102-BU-14
119-PK
MOTOR MOTOR
ST
ON
OFF
B
S
C
MM
307-OR
307-OR
STARTER
4N3181
FRONT GR 3
FRONT GR 5 GN-18
PK-18
GY-18
BU-18
YL-18
OR-18
9
8
7
6
3
BR-18
WH-18
+ BATTERY
START SW
GROUND
START RELAY
3
2
4
1
OR-18
PU-18
BK-18
GN-18
2
1
5
L
L
310-PU
737-GN
202-BK
735-OR
1
2
308-YL
S
T
2
3
1
307-OR
200-BK
126-PK
737-GN
202-BK
743-PU
736-YL
735-OR
734-WH
733-BR
735-OR
735-OR
737-GN
202-BK
NEUTRAL/START
CONTROL
7X1362
737-GN
202-BK
307-OR
308-YL
306-GN
200-BK
715-GN-18
A417-WH
307-OR
308-YL
306-GN
445-GN
204-BK
423-PU
421-BU
422-YL
4
7
9
5
6
8
3
2
10
1
714-YL-18
L5
FUEL PR
COOL FLOW
COOL TEMP
ALARM
20
LAMP
+ BATTERY
CONV TEMP
ENG OIL PR
ALTERNATOR
GROUND
TEST
1
2
15
14
9
19
17
8
18
4
11
16
13
12
7
6
5
3
10
A
A
A
A
444-BU
203-BK
A
201-BK
A
A
BOWL
FLOOD
LAMP
7T9094
FUEL SW
9W3187
SERVICE
METER
6T7337
200-BK
403-GN
R
-+
G S
MTR BAT
MOTOR
T
ALT
+
R
123-WH
200-BK
200-BK-14
403-GN
201-BK
NEGPOS NEGPOS
MOTOR
200-BK
601-GY
L35
L43
200-BK
515-GY-14
200-BK-14
516-GN-14
515-GY-14
513-OR-14
200-BK-14
515-GY-14
516-GN-14
517-BU-14
521-YL-14
201-BK
200-BK
200-BK
L42
123-WH
L39
L42
L24
L14
L20
L43
302-OR
RD-00
RD-00
BK-00
203-BK
201-BK
200-BK
L
165-YL
T
T
T
GEAR 5
GEAR 4
GEAR 3
GEAR 2
GEAR 1
GROUND
6
5
4
7
3
2
1
T
ST
ON
OFF
B
S
C
R
FRONT GR 2
FRONT GR 1
SYNC SOL
DOWN SOL
16
15
+ BATTERY
3
1
REAR GR 1
REAR GR 2
REAR GR 3
REAR GR 4
REAR GR 5
FRONT GR 5
FRONT GR 4
FRONT GR 3
20
19
18
UP SOL14
8
9
10
11
12
GROUND
SYNC LAMP
N/RUN SW
2
17
13
7
6
5
601-GY
A
A
12V BATTERY
9G4247
12V BATTERY
9G4247
AA
ENGINE OIL SW
7T0988
181818
19 19 19
202020
COOLANT SW
9X7088
DIAGNOSTIC CONNECTOR
DISCONNECT SW
7N0718
L4
423-PU
BASE
3T0304
423-PU
UP SHIFT
SOLENOID
6T9290
DOWN SHIFT
SOLENOID
6T9290
SYNC
SOLENOID
6T9290
101-RD
RESISTOR
6T2217
2
1
14
13
12
11
L37
L32
TRANSMISSION
AUX START
RECEPTACLE
121-YL-14
321-BR-14
T
204-BK
BK-8
405-GY 204-BK
308-YL
E
BACKUP
ALARM
3T1815
C
B
D
F
E
202-BK-18
742-GN-18
741-YL-18
740-OR-18
739-WH-18
738-BR-18
TRANSMISSION SWITCHING
CONTROL (SCRAPER)
7X1611
TO
ENGINE
BLOCK
200-BK-12
COOLANT SW
7N9785
T
J
I
H
G
A
101-RD
ACTION
LAMP (SCRAPER)
7N1996
COOLANT SW
8N1693
17
21
T
T
T
OPERATOR
MONITOR
TEST SW
9D3721
CONVERTER SW (SCRAPER)
7N9560
CONVERTER
SENDER
(SCRAPER)
6N5926
TRANSMISSION SW (SCRAPER)
8T8805
310-PU
311-WH
310-PU
ALTERNATOR
6N9294
203-BK
421-BU
202-BK
202-BK
OPERATOR MONITOR
3T9200
421-BU
A417-WH
109-OR
105-BR
START AID
SOLENOID
9G4365
K
T
2
1 604-OR
614-PU
LEFT
STOP/TAIL
LAMP
7X6219
RIGHT
STOP/TAIL
LAMP
7X6219
614-PU
604-OR
B
201-BK
B
640-GN
203-BK
2
11
B
639-WH
B
609-YL
619-GN-14
B
K
00
02
103-YL
604-OR
604-OR
614-PU
4
3
J
START
AID SW
3T3453
KEY
START SW
9G7641
713-OR-18
T
T
T
L9
L32
D
200-BK
200-BK204-BK
200-BK
323-WH
121-YL
321-BR
614-PU
604-OR
712-WH-18
407-PK
200-BK
200-BK
18
1
22
8
13
24
25
16
14
4
12
23
6
5
3
20
19
15
10
7
9
105-BR
306-GN
308-YL
310-PU
121-YL-14
121-YL-14
321-BR-14
321-BR-14
S
T
S
101-RD-8
301-BU
101-RD-8
304-WH-8
310-PU
311-WH
207-BK
200-BK-12
302-OR
204-BK
445-GN
445-GN
START RELAY
9F3099
200-BK-12
109-OR
302-OR
200-BK
323-WH
R
2
1
TT
BK-00
321-BR
421-BU
BK-18
BK-18
U
U
NNP
PR
R
D
D
DHHJ
T
L
L
L
L
S
T
T
T
DD
HH
GG
708-YL
200-BK
711-BR
712-WH
713-OR
714-YL
715-GN
202-BK
716-BU
7
8
10
1
2
3
4
5
9
6
323-WH
321-BR
121-YL
2
1
4
5
3
6
RD-00
BK-00
16
9
8
16
9
8
16
9
8
20
19
18
17
16
15
14
9
KEY
BREAKER
9G9487
ALTERNATOR
BREAKER
2H1507
LAMP
7N5876
INSTRUMENT SW
8D2676
FUEL
PUMP
1W4279
BASE
9G3057
BK/PK-14
BK-14
BK-18
BK-18
202-BK
202-BK
737-GN
202-BK
2
1
BK-00
2
1
40
10
BK-00
FF BB
445-GN
204-BK
423-PU
421-BU
422-YL
323-WH
200-BK
311-WH
204-BK
406-PU
204-BK
204-BK
204-BK
308-YL
310-PU
308-YL
105-BR
204-BK
601-GY
105-BR
744-BU
745-GY
746-PK
423-PU
204-BK
204-BK
421-BU
109-OR-8
109-OR-8
311-WH
207-BK
207-BK
207-BK
304-WH-8
304-WH
302-OR
109-OR
101-RD
RD-00
BK-00
8
12
11
4
2
1
13
5
7
3
6
10
AAA
413-BR
412-BU
407-PK
406-PU
405-GY
403-GN
421-BU
423-PU
422-YL
403-GN
412-BU
413-BR
405-GY
445-GN
407-PK
406-PU
608-GN
6
3
5
4
1
2
14
12
15
11
10
14
12
15
11
10
14
12
15
11
10
7 7
6
3
5
4
1
2
2
1
2
1
308-YL
423-PU
413-BR
412-BU
407-PK
406-PU
405-GY
403-GN
422-YL
A417-WH
2
17
13
7
6
5
4
3
1
2
17
13
7
6
5
4
3
1
2
17
13
7
6
5
4
3
1
445-GN
204-BK
423-PU
421-BU
422-YL
747-WH
743-PU
736-YL
735-OR
734-WH
733-BR
126-PK
742-GN
741-YL
740-OR
739-WH
738-BR
A417-WH
744-BU
745-GY
746-PK
743-PU
737-GN
736-YL
735-OR
734-WH
733-BR
126-PK
X
STARTER
3T8967
423-PU
TRANSMISSION
SPEED SENDER
9X7000
CONV RETR SENDER
(TRACTOR)
6N5926
CONV RETR SW
(TRACTOR)
7N9560
12V BATTERY
9G2648
12V BATTERY
9G2648
LO BEAM
HEAD LAMP
9W0051
LO BEAM
HEAD LAMP
9W0051
TRANSMISSION SW
(TRACTOR)
9X6907
743-PU
747-WH
202-BK
445-GN
422-YL
421-BU
204-BK
PARKING
BRAKE SW
8T9792
201-BK 201-BK 419-YL
BK
W
200-BK
L4
XX
202-BK-18
101-RD
BB
1
STEERING SW
9X1159
311-WH
122-BU
311-WH
310-PU
609-YL
609-YL
122-BU
202-BK
NOTE
A-3
A-6
A-3
C
A-2
A-3
C-7
D-7
8W5218
5T6884
CC-7P
C-7J
DISCONNECT SW
7N0718
RESISTOR
6T2217
C
611-PU-14
619-GN-14
609-YL
A
DOWN SHIFT
SOLENOID
6T9290
UP SHIFT
SOLENOID
6T9290
W/O STEERING SW
CONNECT PLUG D TO
RECEPTACLE D
101-RD-4
1
2
TRANSMISSION
L39
202-BK
201-BK
TRANSMISSION
DD
721-BR-18
722-WH-18
723-OR-18
724-YL-18
725-GN-18
726-BU-18
231-BK-18
E
F
H
D
211-BK
DD
D
ZZ
D
GEAR 1
GEAR 2
GEAR 3
GEAR 4
GEAR 5
GROUND
GND VERIFY
10
9
8
7
6
5
4
3
2
202-BK
207-BK
J
I
G
C
B
A
619-GN-14
SIDE FLOOD
LAMP
7T9094
SIDE FLOOD
LAMP
7T9094
211-BK
BK-00
BK-00
RESISTOR
6T2217
417-GY
201-BK
GROUND
SIGNAL
+V
C
B
A
TO ENG
BLOCK
HI BEAM
HEAD LAMP
9W0052
HI BEAM
HEAD LAMP
9W0052
203-BK
103-YL
614-PU
609-YL
609-YL
CUTTING
EDGE
FLOOD
LAMP
7T9094
301-BU
NEG POS
NEG POS
V
V
SS
2
1
L28
L43
L37
EE
JJ
F
F F
D
AA
506-PU
507-WH
201-BK
408-WH
419-YL
322-GY
126-PK
122-BU
200-BK
121-YL
608-GN
417-GY
323-WH
L37
TO
FRAME
G S
MTR BAT
MOTOR
AUX START
RECEPTACLE
BK-00
RD-00
BK-00
BK-4
BK-00
RD-00
304-WH-8
200-BK-8
200-BK
608-GN
710-GN
704-GY
703-BU
200-BK
709-OR
726-BU
725-GN
724-YL
723-OR
722-WH
721-BR
711-BR-18
470-PU
2
1
2
1
COOLANT SENDER
6N5926
COOLANT SW
7N9785
710-GN
W
BK-18
BK-18
CC
407-PK
406-PU441-OR
444-BU
2
1
KK
202-BK
202-BK
202-BK
709-OR
703-BU
704-GY
203-BK
417-GY
201-BK
201-BK
611-PU-14
310-PU
311-WH
306-GN
308-YL
307-OR
A
200-BK
451-BR
450-YL
522-WH-14
513-OR-14
513-OR-14
522-WH-14
521-YL-14
516-GN-14
200-BK-14
517-BU-14
515-GY-14
521-YL-14
COOLANT SW
9X3040
TACHOMETER
SENDER
9X8167
BK-18
BK-18
FUEL SW
9W3187
611-PU-14
AIR
CONDITIONER
CLUTCH
SOLENOID
7T8600
323-WH
6
619-GN-14
1
5
4
3
2
AAA
A
2
1
323-WH
125-OR
125-OR-14
ENGINE OIL SW
6T7663
ENGINE OIL SW
6T7663
202-BK
202-BK
L38
L38
L38
D
AD
516-GN-14
200-BK
START AID
SOLENOID
7N7259
2
1
BA
COOLANT
SW
8N1693
203-BK
A
C
203-BK
609-YL
611-PU-14
610-OR-14
202-BK
QQ
ALTERNATOR
8N0999 STD
5S9088 ATCH
T
201-BK 405-GY
400-GN
207-BK
619-GN-14
400-GN
D
200-BK-14
B
A
KK
B
A
517-BU-14
515-GY-14
200-BK-8
109-OR-4
451-BR
450-YL
441-OR
444-BU
311-WH
310-PU
412-BU
403-GN
201-BK
413-BR
405-GY
407-PK
406-PU
101-RD-4
304-WH-8
302-OR
2
1
201-BK
413-BR
405-GY
407-PK
109-OR-4
BK-4
403-GN
BK-18
BK-18
2
1
2
1
AIR DRYER
2G2159
413-BR
311-WH
412-BU
122-BU
311-WH
310-PU
201-BK
201-BK
610-OR-14
THIS SCHEMATIC IS FOR THE 637E WHEEL
TRACTOR SCRAPER (3E2022 CHG 00)
ALT
+
R
B
W P
L
H
B
W
ALL DASHED LINES ARE ATTACHMENTS.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS OFF.
WIRES THAT HAVE BATTERY VOLTAGE
WHEN THE KEY SWITCH IS ON.
STARTING CIRCUIT.
GAUGE CIRCUIT.
EMS CIRCUIT.
PANEL LAMP CIRCUIT.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
TRANSMISSION CONTROL CIRCUIT.
START AID CIRCUIT.