446B BACKHOE LOADER ELECTRICAL SCHEMATIC

©
2000 Caterpillar
All Rights Reserved
Printed in U.S.A.
RENR2870
April 2000
446B Backhoe Loader
Electrical System
5BL2500-UP
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Circuits Monitoring Circuits Continued
101 RD Bat (+) 490 GN Opr Mon Neutral Lock
102 BU Head Lamp
Accessory Circuits
103 YL Aux Ckt 500 BR Wiper - Front (Park)
105 BR Key Start Sw 501 GN Wiper - Front (Lo)
109 OR Alt Output (+) Term. 502 OR Wiper - Front (Hi)
112 PU Main Power Rly Output 503 BR Wiper - Rear (Park)
113 OR Opr Mon Panel 504 YL Wiper - Rear (Lo)
116 BR Aux Ckt 505 BU Wiper - Rear (Hi)
118 GY Aux Ckt 513 OR A/C Compressor/Refrigerant Press Sw
119 PK Aux Ckt 515 GY Blower Motor (Hi)
120 YL Aux Ckt 516 GN Blower Motor (Medium)
121 YL Bckp Alarm to Lamp 517 BU Blower Motor (Lo)
122 BU Aux Ckt 520 WH Opr A/C Sw to Thermostat/Fuse
123 WH Aux Ckt 521 YL A/C Sw to Refrigerant Sw
124 GN A/C 522 WH A/C Clutch to Thermostat Sw
126 PK XMSN Ctrl 536 WH Hazard Sw to Turn Sw
128 PK Aux Ckt 552 WH Four Wheel Drive Sol
143 BR Aux Ckt 568 GN Warning Buzzer to Diodes
157 YL Aux Ckt C593 OR Air Seat Sw
161 PK Aux Ckt C594 YL Air Seat Compressor Mtr
194 GN Aux Ckt
Lighting Circuits
Ground Circuits
603 PK Rotary Beacon
200 BK Main Chassis 604 OR Stop Lamp
202 BK XMSN Ctrl 605 YL Turn Lamp - Left
218 BK Start Rly Return 606 GY Turn Lamp - Right
276 BK XMSN Ctrl Ident Code 0 608 GN Flood Lamp - Rear
277 BK XMSN Ctrl Ident Code 1 610 OR Flood Lamp - Front
278 BK XMSN Ctrl Ident Code 2 614 PU Park/Tail/Dash Lamp
279 BK XMSN Ctrl Ident Code 3 617 BR Tail/Position Lamp - Left (Road Pkg)/Width
280 BK XMSN Ctrl Ident Code 4 618 YL Tail/Position Lamp - Right (Road Pkg)/Width
281 BK XMSN Ctrl Ident Code 5 620 WH Flood Lamp Front (Attach)
Basic Machine Circuits
630 GY Flood Lamp Rear (Attach)
301 BU Starter Sol 639 WH Left Hand Stop/Tail Lamp
304 WH Starter Rly Output 640 GN Right Hand Stop/Tail Lamp
306 GN Starter Rly Coil to Neut Start Sw or Key Sw
Control Circuits
307 OR Key Sw to Neut Start Sw 710 GN XMSN Speed Sensor
308 YL Main Power Rly Coil 720 PU XMSN Brake Sw
309 GY Alt Regulator Term. 752 YL XMSN Sol No. 4 (Spd Clutch 1)
310 PU Start Aid Sw to Start Aid Sol 754 BU XMSN Sol No. 5 (Spd Clutch 2)
311 WH Start Aid Sol to Temp Sw 755 OR XMSN Sol No. 6 (Spd Clutch 3)
321 BR Bckp Alarm Lamp Travel Alarm 762 YL Bucket Positioner Sol Sw
322 GY Warning Horn (Forward) 766 GN XMSN Neutralizer Sw
326 PU Key Sw "C" Term. C720 BU Neutral Lock Sw
Monitoring Circuits
F765 BR XMSN-In-Gear Rly
405 GY Opr Mon Oil Press. (Lo Setting) 944 OR Data Link + (CAT)
406 PU Opr Mon Coolant Temp 945 BR Data Link - (CAT)
415 GN Opr Mon Test sw 973 BR Auto/Man 1 Sw - Control
417 GY Primary Ster Sw 975 WH Sol Return - Control
419 YL Opr Mon Parking Brake 977 YL Auto/Man 2 Sw - Control
441 OR Eng Coolant Temp Gauge C920 GY Action Lamp - Control
443 YL Power Train Temp Gauge M998 OR Opr Mon Autoshift Sw
447 PK Fuel Level Gauge N904 PU XMSN Sol No. 1 (Fwd Hi)
450 YL Tach Sender (+) N905 OR XMSN Sol No. 3 (Fwd Lo)
470 BR Park Brake Alarm Enable N907 GN XMSN Sol No. 2 (Rev)
483 BR Brake Fluid Level
Component Location
Component
Schematic
Location
Machine
Component
Schematic
Location
Machine
Location
Air Inlet Heater B-2 14 Relay - Start C-8 A
Alarm - Backup A-9 1 Resistor - Blower (A/C) E-5 12
Alarm - Park Brake C-6 A Resistor - Blower Heater D-4 13
Alternator B-2 2 Resistor - Key Start D-7 A
Batteries A-3 3 Sender - Converter B-2 14
Beacon - Fixed E-9 4 Sender - Coolant C-1 15
Beacon - Fixed F-9 4 Sender - Fuel Level F-4 16
Beacon - Magnetic F-9 4 Sensor - Speed C-2 31
Breaker - Running Lamp B-8 A Solenoid - Air Conditioner Clutch D-1 17
Compressor - Seat D-4 30 Solenoid - Bucket Position A-4 8
Control - Shift D-5 5 Solenoid - Engine Shutdown E-2 18
Control - Transmission A-5 6 Solenoid - Front Drive C-2 19
Diode Block As E-5 B Solenoid - Fwd Low C-2 14
Flasher C-7 A Solenoid - Fwd High C-2 14
Fuses F-5 A Solenoid - Reverse C-2 14
Fuses C-9, D-9 A Solenoid - Spd Clutch 1 C-2 14
Gauge - Converter Temperature D-8 A Solenoid - Spd Clutch 2 C-2 14
Gauge - Coolant Temp E-8 A Solenoid - Spd Clutch 3 B-2 14
Gauge - Fuel Level D-9 A Solenoid - Start Aid A-2 7
Gauge - Voltmeter D-8 A Starter A-2 20
Ground - Platform B-6 34 Switch - Air Seat D-4 30
Ground - Platform E-8 33 Switch - Autoshift D-5 29
Ground - Platform F-4 32 Switch - Beacon E-7 A
Horn - Forward A-2 7 Switch - Blower A/C F-5 9
Indicator - Autoshift D-5 A Switch - Brake C-3 21
Lamp - Action A-7 8 Switch - Brake (2) E--4 22
Lamp - Air Inlet Heater D-7 A Switch - Bucket Position A-3 25
Lamp - Brake Fluid D-3 B Switch - Coolant C-2 15
Lamp - Coolant Temp E-3 B Switch - Engine Oil Pressure C-2 23
Lamp - Engine Oil Pressure E-3 B Switch - Flood Lamp (Front) E-7 A
Lamp - Front Drive D-3 B Switch - Flood Lamp (Rear) E-7 A
Lamp - Left Turn Indicator E-3 B Switch - Flood Lamp (Rear) E-9 A
Lamp - Park Brake E-3 B Switch - Forward Horn D-3 B
Lamp - Primary Steer D-3 B Switch - Front Drive D-3 B
Lamp - Right Turn Indicator E-3 B Switch - Heater Blower E-4 13
Lamp - Start Aid D-7 A Switch - Key Start D-7 A
Meter - Service D-8 A Switch - Parking Brake D-6 24
Motor - Blower (Heater) D-4 9 Switch - Primary Steer C-3 B
Motor - Blower (A/C) E-6 9 Switch - Refrigerant F-1 17
Motor - Fan As F-7 10 Switch - Running Lamp E-7 A
Motor - Wiper (Front) E-3 9 Switch - Start Aid C-2 A
Motor - Wiper (Rear) E-9 11 Switch - Start Aid E-7 A
Relay - Air Conditioner C-9 A Switch - Thermostat E-6 9
Relay - Accessory C-7 A Switch - Turn/Hazard F-3 B
Relay - Inlet Air Heater D-2 A Switch - Wiper (Front) D-6 A
Relay - Cab C-9 A Switch - Wiper (Rear) E-6 A
Relay - Lamp Check C-7 A Switch - Xmsn Neutralizer B-6 A
Relay - Main C-8 A Tachometer D-9 A
Relay - Parking Brake C-7 A Timer As C-7 A
Relay - Power Seat D-5 A
Machine locations are repeated for components located close together.
A = Operator Compartment - Right Console.
B = Operator Compartment - Front Dash.
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
9W-1519 Coolant 107.2° C 93°C Normally
(224.96° F) (199.4°F) Open
9X-3395 Primary Steering 689 ± 103 kPa 415 kPa 1-2 Normally Open
(100 ± 14.9 psi) (60.2 psi MIN) 1-3 Normally Closed
114-5333 Refrigerant Pressure (AC) 275 to 1750 kPa¹ Normally
(40 to 255 psi) Open²
138-7008 Start Aid 32° C -12.2°C to -3.9°C Normally
(0° F) (10°F to 25°F) Closed
168-7557 Brake 13780 kPa Max 10335 ± 689kPa Normally
Closed
¹ A hysteresis band exists: with increasing pressure the closed condition can be maintained up to 3740 kpa (542.4 psi), with decreasing
pressure the closed condition can be maintained down to 166 kpa (24.1 psi).
² Contact position at the contacts of the harness connector.
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
3E-1908 Solenoid : A/C Clutch 3.5 ± 0.15
3E-8620 Solenoid : Bucket Positioner 32.1
3T-9493 Solenoid : Start Aid 1.5
6T-0454 Sender : Fuel Empty - 240 - 260
Full - 27.5 - 39.5
7T-3828 Resistor : A/C Blower Overall - 1.0 ± .1
Tap - .5± 0.5
7T-3828 Resistor : Heater Blower Overall - 1.0 ± .1
Tap - .5± 0.5
8C-4110 Resistor : Key Switch 22 ± 1.1
117-2911 Solenoid : FWD High 7.9 ± 0.5
Sol 6
121-4036 Solenoid : Front Drive 10.5
Sol 4
130-0912 Solenoid : Sol 3 7.9 ± 0.5
Sol 6
¹ At room temperature unless otherwise noted.
Connector Location
Connector Number
Schematic
Location
Machine
Location
CONN 1 A-8 6
CONN 2 B-8 26
CONN 3 B-8 26
CONN 4 B-8 26
CONN 5 B-9 26
CONN 6 B-9 6
CONN 7 B-9 6
CONN 8 B-6 6
CONN 9 B-6 6
CONN 10 C-6 26
CONN 11 Data Link A-7 8
CONN 12 Code Plug A-6 8
CONN 13 E-4 27
CONN 14 C-4 26
CONN 15 B-4 26
CONN 16 B-4 26
CONN 17 A-4 26
CONN 18 B-8 26
CONN 19 A-2 20
CONN 20 D-2 35
The connectors shown in this chart are for harness to harness connectors.
Connectors that join a harness to a component are generally located at or
near the component. See the Component Location Chart.
Failure Mode Identifiers (FMI)¹
FMI No. 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.
14 Parameter failures.
15 Parameter failures.
16 Parameter not available.
17 Module not responding.
18 Sensor supply fault.
19 Condition not met.
20 Parameter failures.
¹The FMI is a diagnostic code that indicates what type of failure has
occurred.
CID Component
668-12 Shift Lever Bad Device or Component
168-00 Battery Voltage Above Normal
168-01 Battery Voltage Below Normal
Component Identifiers (CID)¹ and
Module Identifier (MID117)² for XMSN Control Shift Lever
¹ The CID is a diagnostic code that indicates which component is faulty.
² The MID is a diagnostic code that indicates which electronic control module
diagnosed the fault.
Related Electrical Service Manuals
Form Number
Electric Starting Motor: SENR3828
Transmission and Shift Control RENR2869
Title
Code
Flashed
CID¹ - FMI³ Description
18 -- BHL
25 -- 446B
31 641-05 Forward High
32 642-05 Reverse
33 643-05 Forward Low
34 644-05 Speed Clutch 1
35 645-05 Speed Clutch 2
36 646-05 Speed Clutch 3
38 683-05 Park Br. Alarm Relay Open Circuit
41 641-06 Trans Solenoid 1 Short to Ground
42 642-06 Trans Solenoid 2 Short to Ground
43 643-06 Trans Solenoid 3 Short to Ground
44 644-06 Trans Solenoid 4 Short to Ground
45 645-06 Trans Solenoid 5 Short to Ground
46 646-06 Trans Solenoid 6 Short to Ground
48 683-06 Park Br. Alarm Relay Short to Ground
51 641-03 Tran Solenoid 1 Short to + Battery
52 642-03 Tran Solenoid 2 Short to + Battery
53 643-03 Tran Solenoid 3 Short to + Battery
54 644-03 Tran Solenoid 4 Short to + Battery
55 645-03 Tran Solenoid 5 Short to + Battery
56 646-03 Tran Solenoid 6 Short to + Battery
58 683-03 Park Br. Alarm Relay Short to Battery
68 668-09 Shift Lever Not Responding
69 668-02 Invalid Shift Lever Input
71 168-00 System Voltage Above Normal
72 168-01 System Voltage Below Normal
73 520-02 Trans Configuration Incorrect
75 650-02 Harness Code Unknown
76 367-02 Invalid Ride Control Switch Input
77 621-02 Invalid Downshift Switch
78 368-05 Transmission Auto/Man Open
79 368-06 Transmission Auto/Man Grounded
³The FMI is a diagnostic code that indicates what type of failure has occurred.
Diagnostic Code Conversion
for XMSN Control (MID 81)²
diagnosed the fault.
¹ The CID is a diagnostic code that indicates which component is faulty.
² The MID is a diagnostic code that indicates which electronic control module
A
3
4
5
6
8
9
10
11
12
14
15
13
16
B
1
2
17
18
19
20
21
22
23
24
25
26
27
29
30
31
32
35
33
34
7
A
3
4
5
6
8
9
10
11
12
14
15
13
16
B
1
2
17
18
19
20
21
22
23
24
25
26
27
29
30
31
32
35
33
34
7
Machine Harness Connector and Component Locations
E98188
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.
TRANSMISSIONC-300184-1136Z
R 116-4236 00 A-6 CODE PLUG
POWER SEATD-501161-6360J
D-5
B-9
A-300110-2706
B-2FF 03104-5467
142-3025
AIR COND - ATCHD-200142-3026W
DUAL BEACON - ATCH
WIPERS
FRAME00
ENGINE
CANOPY
C-9
D-9
E-4
WITH ATTACH BEACON REPLACE 10A FUSE WITH
15A FUSE
FUSES 10A-9W-1442 15A-9W-1441 20A-9W-1446
25A-1Q-1905
NORMALLY CLOSED WHEN BRAKE IS DEPRESSED
NORMALLY CLOSED AT PROPER REFRIGERANT CHARGE
A-2
A-3
A-3
A-2
A-2
B-1
05
C-3
NOTE F: THIS 122 WIRE IS FED POWER
FROM THE FUSE.
01
01
00
01
01
00
V
T
S
HEATER BLOWER
140-7602
D-4
PRI STEER LMP - ATCH
4D-6565
(105-3504 CHG 05)
F-1
ATCHE-701
D-2
F-9
F-9
B-6
E-4
B-7
02
P
BEACON AS - ATCH
MAG BEACON - ATCH
A/C BLOWER - ATCH
NOTE
LOC
F-9
01
02
9R-7939
7T-3550
01
184-0866 FRONT CONSOLE
SIDE CONSOLE
PLATFORM01
9R-8619
8R-6892
184-1124
EE
DD
L 01
02
01
02
D-3
PRI STEER - ATCH
K
H
G
E
D
9R-6859
04
B
183-7828
1V-1151
00
9R-7958
BB
L# CIRCUIT GROUPING
DESIGNATION
9R-8722
Y
9R-6501
X
N
M
GG
9R-9607
9R-6500
A
7P-6682
AA
01
CC
NOTE D:
NOTE B:
WIPER MOTORS
CABLE AS.
WIRE AS.
HARNESS AS.
LOCPART NO.IDENT
ATCH WIRE, CABLE,
COMPONENT
CIRCUIT NOT CONNECTED
CIRCUIT CONNECTED
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
CONNECTOR
SYMBOL DESCRIPTION
BROWN
PURPLE
GRAY
BLACK
COLORABBREV
PINK
YELLOW
ORANGE
WHITE
RED
BR
PU
GY
NOTE A:
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF,
AND XMSN SHIFTER IN NEUTRAL
9R-9554
3E-9093
184-4476
NOTE
NOTE C:
CHG
B-7
A-4
184-1129
THIS SCHEMATIC IS FOR THE 446B BACKHOE
B-4
B-4
01
109-7457
00
AIR COND - ATCH
C
F
A-8
B-7
E-7 NOTE E: WHEN ATACHMENT FRONT & REAR FLOOD LAMPS,
9X-6853, ARE INSTALLED ADD ATACHMENT FRONT
FLOOD LAMP SWITCH, 3E-7270. ALSO REMOVE
STANDARD REAR FLOOD LAMP SWITCH, 3E-7270,
AND REPLACE WITH 3E-7268 SWITCH.
UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 18 GAUGE
TO MACHINE STRUCTURE
LL
L
200-BK
200-BK
NEUTRAL LOCK
INDICATOR
3E-8679
113-OR
C720-BU
2
5
1
3
4
6
200-BK
C720-BU
113-OR
106-8704
DFF
E
INLET AIR
HEATER RELAY
117-9080
W
MW
W
W
513-OR
521-YL
513-OR
1
2
521-YL
522-WH
2
1
NEUTRAL LOCK SW
3E-7271
L
490-GN
L990-GN
E
200-BK
F793-OR
2
1
101-RD-6
160-PU-4
1
GND
B+
P
T
MOTOR
L
H
BR-16
GY-16
BK-16
OR-16
GN-16
5
3
6
2
4
L14
L14
L26
2
PRIMARY STEER LAMP
8L-9801
1
417-GY
6
D
2
1
L L
L
L
L
L
L
L
B
B
BASE
LENS
5
4
1
2
3
L6
B
BK-16
GN-16
RD-16
WH-16
200-BK
502-OR
500-BR
639-WH
640-GN
604-OR-16
200-BK
605-YL
128-PK
322-GY
L6
118-GY
419-YL
113-OR
143-BR
606-GY
113-OR
405-GY
536-WH-16
L
1 2
REFRIGERANT SW
114-5333
NOTE A
A
YL-16
E
A
L26
L31
L7
MUR440
406-PU
419-YL
OR-16
143-BR
113-OR
9D-8047
405-GY
606-GY
BK-14
BK-14
605-YL
FLOOD
LAMP
107-1301
200-BK
L6
AIR
CONDITIONER
CLUTCH SOL
3E-1908
FLOOD
LAMP
107-1301
LEFT TURN
IND LAMP
8M-6176
620-WH
620-WH
200-BK
TURN/HAZARD SW
9X-9547
200-BK-16
610-OR
TURN
LAMP
3E-7500
610-OR
200-BK
605-YL
200-BK
606-GY
501-GN
113-OR
CC F
483-BR
1
2
3
BK
ENGINE OIL
PRESS LAMP
8M-6176
RIGHT TURN
IND LAMP
8M-6176
COOLANT
TEMP LAMP
8M-6176
PARK BRAKE
LAMP
8M-6176
9D-2868
113-OR
113-OR
552-WH
9D-2868
9D-8047BASE
LENS
200-BK
FRONT DRIVE
LAMP
8M-6176
2
1
406-PU
BK
128-PK
322-GY
FORWARD
HORN SW
3T-2357
ENGINE
SHUTDOWN
SOL
8C-3662
326-PU
200-BK-10
TO
ENGINE
BLOCK
FRONT WIPER
MOTOR
3E-7306
552-WH
301-BU-10
BRAKE FLUID
LAMP
8L-9801
DOME
LAMP
4M-3601
BK
WH
OPERATOR STATION
2
1
521-YL
521-YL
522-WH522-WH
522-WH
513-OR
513-OR
ARC SUPPRESSOR
L
FRONT DRIVE
SW
3E-7270
113-OR
BK
START
GND
STOP
113-OR
L
552-WH
A
D
200-BK-10
D
BK
D
503-BR
102-BU
118-GY
505-BU
504-YL
500-BR
603-PK
610-OR-16
630-GY-16
620-WH-16
617-BR
618-YL
608-GN-16
639-WH
640-GN
605-YL
606-GY
L46
200-BK-16
308-YL
NOTE F
101-RD-10
122-BU-12
122-BU-12
101-RD-12
TIMER
AS.
138-7009
RELAY
HEAT SW
BAT NEG
BAT POS
YL
200-BK
L990-GN
F874-PK
200-BK
308-YL
4
3
2
1
202-BK
945-BR
944-OR
126-PK
J
H
G
F
C
B
E
D
A
L45
L45
L45
E
200-BK
200-BK
101-RD-12
ACTION
LAMP
3E-8679
126-PK
126-PK
126-PK
C920-GY
L47
101-RD-10
200-BK
B
B
G
G
101-RD-10
H
J
J
200-BK
200-BK
200-BK
200-BK
L11
L11
L11
L18
L25
L12
L12
L22
L23
L30 L30
L30
L34
L34
L35
L35
L35
L35
L36
L36
L36
L37
L37
L37
L38
L39
GN
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
BK
112-PU-10
L18
617-BR
120-YL-12
B
126-PK-16
200-BK
161-PK-16
304-WH-10
START
RELAY
3E-9362
101-RD-10
200-BK
L987-WH
119-PK
502-OR
501-GN
500-BR
504-YL
505-BU
118-GY
102-BU
503-BR
101-RD-12
ACC RELAY
3E-9362
304-WH-10
H
H
200-BK
H
87
87a
87a
87
30
86
85
303-BR
200-BK
200-BK
B
M
415-GN
PARK BRAKE ALARM
RELAY
3E-9362
RD
200-BK
101-RD-10
306-GN
307-OR
LAMP CHECK
RELAY
3E-9362
K
308-YL
K K
143-BR
200-BK
200-BK
308-YL
102-BU
102-BU-16
304-WH-10
101-RD-10
101-RD-10
E
H
620-WH-16
610-OR-16
603-PK
608-GN-16
630-GY-16
441-OR
443-YL
447-PK
450-YL
309-GY
200-BK-16
536-WH-16
161-PK-16
307-OR
415-GN
306-GN
128-PK
113-OR
143-BR
126-PK
618-YL
143-BR
415-GN
1
2
103-YL-16
157-YL
101-RD-12
103-YL-16
L1
K
L40
113-OR
H
H
E
E
K
A
A
112-PU-10
K
E
H
E
K
103-YL-10
E
B
B
200-BK
MAIN
RELAY
3E-9362
101-RD-10
30
30
87
A/C
RELAY
3E-9362
12
87
87a
87a
85
85
3
L41
L41
K
L35
86
86
11
10
9
8
7
6
5
4
306-GN
FLOOD
LAMP
107-1301
3
2
1
K
K
308-YL
12
11
10
9
450-YL
4
5
F765-BR
6
BACKUP
ALARM
102-9236
307-OR
T
S
STOP/
TAIL
LAMP
3E-7398
200-BK
640-GN
618-YL
200-BK
441-OR
630-GY
326-PU
218-BK
194-GN-10
568-GN
443-YL
FLOOD
LAMP
107-1301
103-YL-16
L987-WH
8
200-BK
608-GN
7
128-PK
85
H
M
308-YL
121-YL
86
30
87
536-WH-16
87a
H
30
86
85
H
H
419-YL
116-BR-12
119-PK
113-OR
K
307-OR
10A
975-WH
XSMN CONTROL
M
H
101-RD-10
112-PU-10
10A
200-BK
OPERATOR STATION
307-OR
6
5
FRONT DRIVE
4
321-BR
3
49A
BACKUP ALARM/BEACON
OUT (LAMP)
+ BATTERY
GROUND
31
49
30
86
2
FLASHER
7T-4848
1
157-YL
MONITOR LAMPS
122-BU-12
12
ACTION ALARM
11
10
9
8
85
87a
87
30
7
E
6
86
5
4
101-RD-12
3
2
1
113-OR
194-GN-10
HEATER
E
85
CAB
RELAY
3E-9362
M
536-WH-16
447-PK
126-PK-16
128-PK
200-BK-16
87a
87
122-BU-12
306-GN
608-GN-16
618-YL
617-BR
630-GY-16
620-WH-16
610-OR-16
C
B
A
603-PK
200-BK-16
610-OR
620-WH
501-GN
502-OR
119-PK
122-BU-10
606-GY
603-PK
620-WH
610-OR
617-BR
608-GN
639-WH
630-GY
605-YL
200-BK-16
200-BK
200-BK
200-BK
605-YL
640-GN
639-WH
608-GN-16
618-YL
617-BR
620-WH-16
630-GY-16
20A
15A
126-PK
161-PK-16
610-OR-16
10A
10A
10A
10A
10A
128-PK
113-OR
123-WH
121-YL
116-BR-12
118-GY
119-PK
FRONT FLOOD
BUCKETPOS/HORN
FRONT WIPER
REAR WIPER
REAR FLOOD
RUNNING LAMP
BREAKER
3T-2662
200-BK-16
15A
25A
10A
K
606-GY
603-PK
101-RD-10
NOTE D
C
B
A
101-RD-10
306-GN
307-OR
326-PU
101-RD-12
M
K
DATA
LINK
PLUG
101-RD-12
568-GN
GAUGES
CONN 1
CONN 11
CONN 12
CONN 2
CONN 3
CONN 18
CONN 5
CONN 4
CONN 6
CONN 7
CONN 8
CONN 9
CONN 10
AUTOSHIFT IND.
140-6193
E
E
E
E
E
E
E
973-BR
M998-OR
113-OR
977-YL
C720-BU
6
4
3
1
J
1
87
87a
5
200-BK-12
2
C594-YL-12
30
C593-OR
200-BK-12
86
MOTOR
SEAT COMPRESSOR
SEAT SW
122-BU
J
POWER SEAT RLY
3E-9362
AIR SEAT
SEAT GP
164-2507
85
2
NOTE F
122-BU-12
122-BU-12
BRAKE SW
105-8034
NOTE B
419-YL
202-BK
A/C
161-PK
A/C
4
L14
415-GN
L14
568-GN
405-GY
406-PU
417-GY
483-BR
F
200-BK
417-GY
113-OR
447-PK
483-BR
8
1
12
11
10
2
E
1
10
11
7
6
5
2
8
9
3
122-BU-12
C593-OR
C594-YL-12
REAR WIPER
SW
7T-9303
B
H
L
P W
B
12
C
3
4
5
6
7
9
P
604-OR
L27
L26
L26
604-OR
AUTOSHIFT SW
3E-7271
604-OR-16
L25
E E
L39
161-PK
N
N
N
N
L39
L39L39
522-WH
520-WH-12
552-WH
322-GY
143-BR
405-GY
113-OR
B
200-BK
200-BK-12
502-OR
500-BR
118-GY
501-GN
200-BK
200-BK-12
L25
200-BK-12
605-YL
606-GY
405-GY
113-OR
605-YL
606-GY
406-PU
419-YL
128-PK
605-YL
606-GY
639-WH
640-GN
RESISTOR
7T-3828
515-GY-12
516-GN-12
406-PU
322-GY
200-BK
200-BK
119-PK
119-PK
536-WH-16
N
113-OR
122-BU-10
515-GY-12
200-BK-12
517-BU-12
200-BK
MOTOR
HEATER
BLOWER SW
6P-3236
122-BU-10
200-BK-12
417-GY
+BAT (12V)
UNUSED
UNUSED
BACKUP ALARM
KEY SW
START RLY OUT
GROUND
START RLY RTN
L17
L16
200-BK-12
C
610-OR-16
102-BU
202-BK
119-PK
K
K
A
167-3847
P
P
LE
N
P
102-BU
200-BK
200-BK
102-BU
P
LOAD LCK RLY IN
CDL (+)
CDL (-)
P
E
L16
N
L
L
L16
L
417-GY
L38
K
K
K
K
419-YL
417-GY
200-BK
200-BK
128-PK
L16
161-PK-16
K
K
UNUSED
A
BK-14
BLOWER
MOTOR
3E-7501
B
119-PK
E
415-GN
200-BK
200-BK
417-GY
BRAKE SW
105-8034
NOTE B
200-BK-12
E
503-BR
505-BU
504-YL
119-PK
102-BU
OPERATOR STATION
E
E
F
F
P
B
C
A
L40
119-PK
FRONT
WIPER SW
7T-9303
9
FUEL
SENDER
6T-0454
WH/RD-14
447-PK
202-BK
552-WH
143-BR
521-YL
11
503-BR
118-GY
505-BU
504-YL
500-BR
501-GN
502-OR
118-GY
10
B
B
H
L
W
P
P
505-BU
504-YL
503-BR
102-BU-16
3
4
5
2
1
6
3
1
5
483-BR
DIODE BLOCK AS
112-4735
620-WH-16
BLOWER
3E-7501
3
4
5
2
4
BLOWER SW
6P-3236
RESISTOR
7T-3828
517-BU-12
516-GN-12
515-GY-12
120-YL-12
520-WH-12
2
7
102-BU
118-GY
1
200-BK
8
10A
515-GY-12
FUSE HOLDER
4K-5122
124-GN-12
MOTOR
E
BK-14
PARK
BRAKE SW
105-8034
12
118-GY
N
P
P
P
TO
PLATFORM
THERMOSTAT SW
3E-5465
WH/RD-14
10A FUSE 3K-8782
25A FUSE 128-0669
25A 124-GN-12
522-WH
200-BK-16
T
SHIFT CTRL
CONN 13
382-PK
322-GY
128-PK
321-BR
304-WH-10
101-RD-10
101-RD-10
101-RD-10
200-BK-10
710-GN
406-PU
450-YL
441-OR
443-YL
326-PU
752-YL
202-BK
N905-OR
N904-PU
755-OR
754-BU
F874-PK
L987-WH
N907-GN
975-WH
200-BK
552-WH
405-GY
382-PK
C
B
A
200-BK
202-BK
710-GN
552-WH
Z
552-WH-18
710-GN-18
202-BK-18
SPEED SENSOR
6V-2455
1
2
Z
RD
RD
RD
RD
RD
RD
RD
START AID JUMPER
139-9606
RD
BK/YL
BK
YL
WH
A
B
C
STRAP AS 110-2706
FF
AIR INLET HEATER
155-4911
160-PU-4
D
GG
BRAKE SW
168-7557
T
C
D
160-PU-4
382-PK
200-BK
200-BK-18
F793-OR
200-BK
382-PK
L987-WH
F874-PK
F874-PK
L987-WH
B
L3
L3
L3
D
L3
D
D
L2
D
TO ENGINE
FRAME
E
1
2
200-BK BK-16
483-BR
RD-16
101-RD-6
G
D
EE
DD
TO
ENGINE
BK-6
CCCC
BK-00
TO
FRAME
DD
L990-GN
GG
200-BK
417-GY
BK 1
F
2
BK-6
D
ALT
3
RD
BU
PRIMARY
STEER SW
9X-3395
N904-PU
D
2
G G
B
B
G
D
1
D+
R
+
-
BB
L2
AA
322-GY
200-BK
200-BK
620-WH
L2
L1
Z
D
382-PK
200-BK
606-GY
200-BK-16
610-OR
620-WH
B
975-WH
754-BU
975-WH
754-BU
752-YL
752-YL
975-WH
A
N907-GNN907-GN
755-OR
975-WH
N905-OR
N904-PU
975-WH
SPD CLUTCH 1
121-4036
(SOL 4)
BAT
MTR
762-YL
322-GY
200-BK
200-BK
610-OR
200-BK
200-BK
2
TO
ENGINE
1
2
SPD CLUTCH 3
130-0912
(SOL 6)
755-OR
B
C
Z
N905-OR
975-WH
REVERSE
148-8986
(SOL 2)
L7
1
TO
ENGINE
2975-WH
D
D
FLOOD
LAMP
107-1301
FLOOD
LAMP
107-1301
RD-00
RD-00
BK-00
BK-00
382-PK
BATTERY
3T-5760
BATTERY
3T-5760
NEG POS NEGPOS
Z
Z
FWD LOW
130-0912
(SOL 3)
START AID
SW
138-7008
TURN
LAMP
3E-7500
1
2
1
X
101-RD-10
RD
RD
FWD HIGH
117-2911
(SOL 1)
D
B
STARTER
111-9860
G
1
2
BUCKET
POSITIONER
SW
129-6466
ENGINE
OIL SW
7W-1238
Z
101-RD-10
101-RD-10
BB
309-GY
BK
BK
2
1
START AID
SOL
3T-9493
301-BU-10
MOTOR
RD
D
450-YL
101-RD-4
101-RD-4
304-WH-10
FORWARD
HORN
7T-0635
441-OR
S
G
B
200-BK
X
405-GY
406-PU
405-GY
RD-00
326-PU
443-YL
BB
TO
FRAME
AA
SPD CLUTCH 2
117-2911
(SOL 5)
CONVERTER
SENDER
4W-9972
200-BK-10 200-BK
AA
A
D
ALTERNATOR
90A 149-2064 STD
FRONT DRIVE
SOLENOID
121-4036
RD
RD
RD
301-BU-10
Z
200-BK406-PU
COOLANT SW
9W-1519
COOLANT
SENDER
4W-9972
441-OR
T
T
443-YL
T
EE
309-GY
450-YL
CONN 17
CONN 16
CONN 15
CONN 14
CONN 20
CONN 19
309-GY
UNUSED
UNUSED
UNUSED
L49
L49
L49
L48
L48
L46
202-BK
419-YL
975-WH
419-YL
975-WH
382-PK
2
3
4
5
F765-BR
419-YL
975-WH
6
7
710-GN
200-BK
PK
382-PK
382-PK
F793-OR
126-PK
126-PK-16
F874-PK
F793-OR
L990-GN
L990-GN
382-PK
382-PK
450-YL
443-YL
441-OR
326-PU
308-YL
406-PU
405-GY
382-PK
N904-PU
975-WH
N907-GN
754-BU
752-YL
N905-OR
755-OR
L990-GN
F793-OR
F874-PK
12
11
10
9
8
7
6
5
4
3
2
L990-GN
F874-PK
8
7
200-BK
944-OR
6
975-WH
8
755-OR
754-BU
752-YL
N905-OR
N907-GN
N904-PU
C920-GY
281-BK
280-BK
279-BK
278-BK
277-BK
276-BK
202-BK
766-GN
C720-BU
UNUSED
SOLENOID RETURN
XMSN-N-GEAR RLY
SPEED CLUTCH 3
SPEED CLUTCH 2
SPEED CLUTCH 1
FWD LOW SOL
REV SOLENOID
FWD HIGH SOL
ACTION LAMP
HARNESS CODE 5
5
552-WH
200-BK
975-WH
1
2
3
21
4
5
6
7
8
9
12
10
11
14
15
16
17
18
19
20
13
HARNESS CODE 4
HARNESS CODE 3
HARNESS CODE 2
HARNESS CODE 0
UNUSED
UNUSED
UNUSED
AUTO/MAN 2 SW
UNUSED
977-YL
AUTO MAN 1 SW
UNUSED
UNUSED
NEUTRAL/DOWN SW
UNUSED
22
23
24
25
4
3
26
27
28
29
L28
L28
L28
L28
L29
30
32
L29
L29
L45
DATA LINK -
DATA LINK +
2
1
382-PK
F793-OR
945-BR
200-BK-16
200-BK
200-BK
UNUSED
200-BK-10
UNUSED
200-BK
XMSN OUT SPEED
UNUSED
307-OR
306-GN
126-PK-16
33
34
200-BK
417-GY
ZE
L11
128-PK
1
2
483-BR
200-BK
200-BK
447-PK
200-BK
126-PK
1
4
35
36
37
38
126-PK-16
202-BK
321-BR
39
40
31
973-BR
945-BR
944-OR
HARNESS CODE 1
PARK BK SW IN 419-YL
F793-OR
218-BK
200-BK
944-OR
202-BK
= DENOTES SOLENOID
ENERGIZED
NEUTRAL LOCK
UNUSED
9
10
10
11
2
E
D
3
6
L987-WH
202-BK
R
276-BK
277-BK
278-BK
279-BK
280-BK
281-BK
202-BK
E
C920-GY
CODE
PLUG
202-BK
L7
200-BK-10
L7
L7
L17
L38
L39
975-WH
N907-GN
F765-BR
977-YL
200-BK
973-BR
C720-BU
L47
+BATT (12V)
321-BR
307-OR
M
P
306-GN
202-BK
1
2
218-BK
H
521-YL
522-WH
200-BK-12
120-YL-12
202-BK
5
945-BR
944-OR
7
202-BK
419-YL
202-BK
945-BR
552-WH
405-GY
406-PU
113-OR
143-BR
6
321-BR
128-PK
322-GY
200-BK-10
200-BK
101-RD-10
101-RD-10
202-BK
5F
184-2496
202-BK-16
L17
L25
3F
L16
L12
L23
TRANSMISSION
NEUTRALIZER SW
9R-9868
PARK BRAKE
ALARM
110-8046
H
H
H
L22
L22
L19
L19
5
L19
2F
218-BK
F765-BR
L18
1F
568-GN
N
202-BK-14
F765-BR
382-PK568-GN
218-BK
F874-PK
1R
2R
3R
L18
1
2
12V
OUTPUTS
4F
L18
101-RD-10
4
B
U
S
T6
G
E
D
568-GN
54
M
3
321-BR
E
21
E G
SOLENOID
GEAR
L40
L25
M
3
1
12
XMSN CONTROL
1
218-BK
766-GN
2
E
202-BK-14
161-PK-16
128-PK
322-GY
640-GN
639-WH
605-YL
606-GY
122-BU-10
419-YL
8
415-GN
200-BK-16
200-BK-12
568-GN
P
113-OR
766-GN
OPERATOR STATION
202-BK
710-GN
128-PK
GN
536-WH-16
766-GN
128-PK
L12
304-WH-10
126-PK-16
L987-WH
322-GY
F874-PK
L28
200-BK
306-GN
307-OR
E
321-BR
L990-GN
E
TO PLATFORM
GROUND
BK
BK 128-PK
762-YL
1
OPERATOR STATION
754-BU
755-OR
N904-PU
N905-OR
766-GN
202-BK
BUCKET
POSITIONER
SOLENOID
3E-8620
752-YL
126-PK
D
326-PU
443-YL
441-OR
450-YL
308-YL
406-PU
405-GY
E
L45
L16
-
+
710-GN
E
382-PK
2
1
308-YL
H
308-YL
140-6193
140-6193
FLOOD
LAMP
107-1301
308-YL
L987-WH
116-BR-16
ATTACHMENT REAR FLOOD LAMP SW
REAR FLOOD
LAMP SW
3E-7268
116-BR-12
116-BR-16
630-GY-16
608-GN-16
6
4
3
1
5
2
L27
TO
PLATFORM
TO
PLATFORM
TO
PLATFORM
T
T
W/ATCH HARNESS AS. T CONNECT
HARNESS AS. B AND BEACON
9X-8079 AS SHOWN
603-PK
B
200-BK-16
603-PK-16
RD
BK
T
V
V
128-6984
V
V
128-6984
4
5
200-BK-16
Y
Y
BK-14
B
B
B
B
B
B
B
G
A
SEND
T
603-PK-16
172-3574
SOCKET AS.
9R-7941
L27
L27
L31
L31
L38
L38
L37L44
F793-OR
382-PK
L42 L42
L42
L43
L43
L43
L34
L34
L30
L30
L36
L36
L37
200-BK
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H H
H
H
H
H
H
200-BK
200-BK
441-OR
200-BK
200-BK
443-YL
200-BK
200-BK
200-BK
200-BK
441-OR
443-YL
447-PK
123-WH
123-WH
123-WH
123-WH
123-WH
200-BK
123-WH
200-BK
200-BK
200-BK
200-BK
H
K
172-3575
H
L41
AIR INLET
HEATER LAMP
START
AID LAMP
614-PU
307-OR
119-PK
H
TACHOMETER
H
123-WH
B
617-BR
L41
M
603-PK
608-GN-16
450-YL
308-YL
308-YL
105-BR-16
B
H
308-YL-16
309-GY
614-PU
L44
308-YL
161-PK-16
H
L987-WH
A
116-BR-16
116-BR-16
H
2
FRONT FLOOD
LAMP SW
3E-7270
NOTE E
2 1
620-WH-16157-YL
H
H
H
TO
PLATFORM
2
630-GY-16
608-GN-16
2 1
L42
103-YL-16
614-PU
COOLANT
172-3573
FIXED
BEACON
SERVICE
METER
6T-7337
VOLTMETER
450-YL
200-BK
116-BR-12
614-PU
614-PU
200-BK
123-WH
157-YL
614-PU
START
AID SW
3E-7272
614-PU
614-PU
200-BK
TO RADIO
119-PK
S
CONNECT HARNESS AS. S TO HARNESS
AS. B AND BEACON 9R-8250 AS SHOWN
603-PK-16
603-PK
FIXED
BEACON
603-PK-16
200-BK
B
S
S
200-BK
200-BK
200-BK
200-BK
200-BK
A
B
608-GN
A
OR-16
BR-16
614-PU
614-PU
630-GY
630-GY-16
447-PK
603-PK
123-WH
H
MOTOR
TO
PLATFORM
123-WH
STOP/
TAIL
LAMP
3E-7398
T
S
200-BK
200-BK
200-BK-16
200-BK
B
605-YL
610-OR
620-WH
639-WH
200-BK
617-BR
617-BR
639-WH
200-BK-16
610-OR
FAN AS.
5D-2855
119-PK
RD
OR-14
RD-14
308-YL-16
116-BR-12
GY-16
GN-16
605-YL
620-WH
608-GN
200-BK
1
1
200-BK-16
S
S
H
200-BK
OPERATOR STATION
OPERATOR STATION
REAR WIPER
MOTOR
3E-7304
C
B
BK-16
L
H
MOTOR
A
450-YL
A
610-OR-16
H
2
200-BK
1
603-PK
200-BK-16
200-BK
630-GY
161-PK-16
STOP LAMPS
HAZARD LAMPS
BK
614-PU
102-BU-16
H
H
H
H
H
H
H
200-BK
614-PU
H
200-BK
H
H
H
CONV
TEMP
172-3572
200-BK
H
200-BK
H
308-YL
FUSE
HOLDER
9W-2035
NOTE C
- +
303-BR
447-PK
- +
SIG
IGN
SEND
GRD
IGN
SEND
GRD
IGN
SEND
GRD
IGN
GRD
KEY SW
110-7883
RESISTOR
8C-4110
ACC
A
15A
DIODE
8C-5444
15A
LAMP
8M-6176
ST
REAR FLOOD
LAMP SW
3E-7270
NOTE E
BEACON SW
3E-7270
ON
OFF
303-BR
B
S
H
LAMP
8M-6176
LAMP
8M-6176
443-YL
LAMP
8M-6176
618-YL
PANEL
LAMP
8L-9801
200-BK
C
KEY
R
105-BR-16
RIGHT TAIL LAMP
LEFT TAIL LAMP
119-PK
441-OR
LAMP
8M-6176
H
MAGNETIC
BEACON
128-6985
10A
10A
504-YL
505-BU
503-BR
119-PK
119-PK
603-PK-16
603-PK
FLOOD
LAMP
107-1301
123-WH
121-YL
200-BK
614-PU
L
102-BU-16
102-BU-16
6
NOTE E
3
503-BR
RUNNING
LAMP SW
3E-7268
505-BU
326-PU
504-YL
L30
L30
5
3
6
4
H
172-3570
2
H
1
200-BK
450-YL
5
4
L43
K
E97668
TEMP GAUGE
GAUGE
FUEL GAUGE
F
E
D
C
B
A
F
E
D
C
B
A
78 6 5 4 3 2 19
78 6 5 4 3 2 19
STARTING CIRCUIT.
GAUGE CIRCUIT.
MONITOR CIRCUIT.
PANEL LAMP CIRCUIT.
WASHER/WIPER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
START AID CIRCUIT.
TRANSMISSION CONTROL CIRCUIT.
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.