INTERACTIVE SCHEMATIC

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EC-C2 E-C60 this interactive schematic
EC-C3
to your desktop
E-C61

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EC-C1
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machine view, clicking on this button will
Click on any text that is BLUE and make all of the callouts visible. This
underlined. These are hyperlinks button is located in the top right corner
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schematic and machine views.

ELECTRICAL SYMBOLS BASIC HYDRAULIC

HOTKEYS (Keyboard Shortcuts) COMPONENT SYMBOLS
T

Pressure Temperature Level Flow

Switch Switch Switch Switch Circuit Breaker Pump
Variability
FUNCTION KEYS or Motor

Click here to view the

Spring
Zoom In “CTRL” / “+” Schematic Symbols
Fluid
Conditioner (Adjustable)

Zoom Out “CTRL” / “-” and Definitions page

Fit to Page “CTRL” / “0” (zero)

Hand Tool “SPACEBAR” (hold down)
Find “CTRL” / “F”
Search “CTRL” / “SHIFT” / “F”
SCHEMATIC SYMBOLS AND DEFINITIONS

VALVES INTERNAL PASSAGEWAYS PUMPS BASIC HYDRAULIC

ENVELOPES FLOW IN ONE
DIRECTION
FLOW ALLOWED IN
EITHER DIRECTION
PARALLEL
FLOW
CROSS
FLOW
FIXED DISPLACEMENT
COMPONENT SYMBOLS

One Position Two Position Three Position Unidirectional Bidirectional Pump

Infinite Two Three Variability
Positioning Position Position or Motor
PORTS VARIABLE DISPLACEMENT
NON- COMPENSATED

CYLINDERS Fluid Spring

(Adjustable)
Two-way Three-Way Four-Way Conditioner
Unidirectional Bidirectional
CONTROL
AB
MOTORS
AB
Single Acting Double Acting
Pressure
FIXED DISPLACEMENT Spring
P T P T Compensation
Normal Position Shifted Position Infinite Position

CHECK
ACCUMULATORS Unidirectional Bidirectional Control Line Restriction
Valves (Variable)
VARIABLE DISPLACEMENT
Basic Spring Shuttle NON- COMPENSATED
Pilot
Symbol Loaded Line Restriction
Controlled Spring Loaded Gas Charged Restriction
(Fixed)

Unidirectional Bidirectional

MAIN AUX.

PILOT CONTROL
Line Restriction 2-Section
RELEASED PRESSURE ROTATING SHAFTS Variable and Pressure
Compensated
Pump

Unidirectional Bidirectional
External Return Internal Return
Attachment Pump: Variable and
REMOTE SUPPLY PRESSURE Pressure Compensated

Internal Hydraulic Pneumatic

Simplified Complete Supply Pressure Energy Triangles

COMBINATION CONTROLS
LINES MEASUREMENT

Solenoid Solenoid Solenoid Solenoid and Servo Thermal Detent Crossing Joining
or Manual and Pilot Pilot or Manual Pressure Temperature Flow

MANUAL CONTROL FLUID STORAGE RESERVOIRS

Push-pull Lever Manual Shutoff General Manual Push Button Pedal Spring Vented Pressurized Return Above Fluid Level Return Below Fluid Level

HYDRAULIC SYMBOLS - ELECTRICAL ELECTRICAL SYMBOLS

G
M T

Pressure Temperature Level Flow

Transducer Transducer Generator Electric Pressure Pressure Switch Temperature Electrical
Switch Switch Switch Switch Circuit Breaker
(Fluid) (Gas / Air) Motor Switch (Adjustable) Switch Wire

BASIC ELECTRICAL COMPONENT SYMBOLS HARNESS AND WIRE SYMBOLS

Wire, Cable, or Harness Assembly Identification:
Fuse: A component in an electrical circuit that will open the circuit if too much current flows through it. Includes Harness Identification Letters and Harness
Connector Serialization Codes (see sample).
Switch (Normally Open): A switch that will close at a specified point (temp, press, etc.). The circle indicates
that the component has screw terminals and a wire can be disconnected from it.
AG-C4 L-C12
Switch (Normally Closed): A switch that will open at a specified point (temp, press, etc.). 111-7898 3E-5179
No circle indicates that the wire cannot be disconnected from the component. Part Number: for 1
Connector Plug
Ground (Wired): This indicates that the component is connected to a grounded wire. 2
The grounded wire is fastened to the machine.
Plug Receptacle
Pin or Socket Number
Ground (Case): This indicates that the component does not have a wire connected to ground.
It is grounded by being fastened to the machine. Harness Identification Letter(s): (A, B, C, AA, AB, AC, ...)

Reed Switch: A switch whose contacts are controlled by a magnet. A magnet closes the contacts of Harness Connector Serialization Code: The "C" stands for
"Connector" and the number indicates which connector in the
a normally open reed switch; it opens the contacts of a normally closed reed switch.
harness (C1, C2, C3, ...)
L-C12
Sender: A component that is used with a temperature or pressure gauge. 3E-5179
The sender measures the temperature or pressure.
T Its resistance changes to give an indication to the gauge of the temperature or pressure. 5A
Component
Relay (Magnetic Switch): A relay is an electrical component that is activated by electricity. Fuse (5 Amps) 9X-1123 Part Number
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. 325-AG135 PK-14
Harness identification code:
This example indicates wire group 325, Wire Gauge
Solenoid: A solenoid is an electrical component that is activated by electricity. wire 135 in harness "AG". Wire Color
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. 1 Deutsch connector: Typical representation
of a Deutsch connector. The plug contains all
2 sockets and the receptacle contains all pins.
Magnetic Latch Solenoid: An electrical component that is activated by electricity and held latched by a
permanent magnet. It has two coils (latch and unlatch) that make electromagnet 1 Sure-Seal connector: Typical representation
when current flows through them. It also has an internal switch that places of a Sure-Seal connector. The plug and receptacle
2 contain both pins and sockets.
the latch coil circuit open at the time the coil latches.
 UENR5425-02
December 2017

424B, 424B HD and 424B2

Backhoe Loader
Electrical System
424B: 424B HD: 424B2:
JRC7780-UP JRY1-UP JTH1-UP
JRN1-UP

© 2017 Caterpillar CAT, CATERPILLAR, their respective logos, “Caterpillar Yellow”, and the POWER EDGE trade dress as well as
All Rights Reserved corporate and product identity used herein, are trademarks of Caterpillar and may not be used without permission.
 COMPONENT LOCATION

Schematic Machine Schematic Machine

Component Component
Location Location Location Location
Alternator D-1 1 Relay - Right Rear (STD) E-16 38
Battery A-5 2 Relay - RR Auxilary Lamp F-16 39
Block - Fuse E-14 3 Relay - Start G-16 40
Block - Light Diode B-6 4 Resistor - Excitation E-1 41
Control - Transmission (FNR) G-7 5 Sender - Coolant Temperature F-1 42
Control Gp - Product Link PL240 I-13 6 Sender - Fuel Level E-1 43
Diode B-6 7 Sender - Temperature Converter E-1 44
Diode - Neutral Alarm E-7 8 Sensor - Speed F-1 45
Diode - Reverse F-1 9 Solenoid - Bucket Position H-1 46
Gauge - Coolant Temperature C-8 10 Solenoid - Forward Transmission G-1 47
Gauge - Fuel Level C-8 11 Solenoid - Reverse Transmission G-1 48
Gauge - Tachometer and Service Meter D-8 12 Solenoid - Side Shift Lock H-13 49
Gauge - Temperature (Torque Converter Oil) E-4 13 Speedometer D-4 50
Ground - Engine H-1 14 Suppressor Diode (Forward) G-1 51
Ground - Frame B-4 15 Suppressor Diode (Reverse) G-1 52
Ground - Hammer I-12 16 Switch - Brake 1 E-12 53
Ground - RH Cab Fender D-12 17 Switch - Brake 2 D-12 54
Ground - Top Cab A-14 18 Switch - Coolant Temperature E-1 55
Horn - Forward E-1 19 Switch - Fog Lamp F-3 56
Horn - Rear H-15 20 Switch - Foot I-11 57
Module - Warning Indicator (With Alarm) E-9 21 Switch - Front Flood B-9 58
Module - Warning indicator (Without Alarm) F-4 22 Switch - Front Roading Lamp G-3 59
Motor - Front Wiper B-14 23 Switch - Hammer I-11 60
Motor - Starter D-1 24 Switch - Hazard F-3 61
Power Port D-12 25 Switch - Key Start C-6 62
Relay - Flasher G-7 26 Switch - Loader Neutralizer E-12 63
Relay - Flasher Rear Horn G-7 27 Switch - Multifunction (Stalk) F-7 64
Relay - Flood Lamp (STD) G-7 28 Switch - Parking Brake E-12 65
Relay - Front Lamp F-16 29 Switch - Pressure (Engine Oil) E-1 66
Relay - Front Wiper E-16 30 Switch - Rear Flood (ATCH) B-8 67
Relay - Horn H-7 31 Switch - Rear Flood (STD) B-8 68
Relay - Low Side Control H-7 32 Switch - Rear Horn B-9 69
Relay - Main G-16 33 Switch - Sideshift Lock B-9 70
Relay - Neutral Lock Alarm I-7 34 Switch - Toggle (Fan) C-6 71
Relay - Neutralizer I-7 35 Switch - Transmission Neutral E-12 72
Relay - Parking Brake Alarm I-7 36 Switch - Transmission Neutral Lock G-3 73
Relay - Reverse Lamp H-7 37 Valve Gp - Hammer J-12 74
CONNECTOR LOCATION

Schematic
Connector Number
Location
CONN 1 D-16, G-12
CONN 2 D-16, F-12
CONN 3 D-16, F-12
CONN 4 D-16, D-6
CONN 5 C-16, F-12
CONN 6 B-6, C-16
CONN 7 I-15, C-6
CONN 8 C-14
CONN 9 B-14
CONN 10 B-14
CONN 11 H-13, H-12
CONN 12 I-13
CONN 13 H-12
CONN 14 D-6, H-12
CONN 15 C-6, G-12
CONN 16 E-12
CONN 17 B-5
CONN 18 C-5
CONN 19 F-5
CONN 20 G-5
CONN 21 H-5
CONN 22 E-3
CONN 23 F-1
CONN 24 H-1

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.
 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

J J

HAMMER FUSE

PJ-C2
2S6024 TO BTRY POS TERMINAL
(74) VALVE SOL 119-HA2 RD-1 119-HA2 RD-1 5 101-HA1 RD-1 SH 1 LOC A-4 568-PW9 GN-1 110-PW65 RD-1
2497422 433-3096 HA-C2 123-PW98 WH-1 110-PW139 RD-1
A110-PJ2 RD-075-FLRY 1 1552269 TO MATING CONNECTOR 419-PW71 YL-1 110-PW140 RD-1
201-PJ5 BK-075-FLRY 2
CONN 12 1 951-HA5 PK-1 203-HA6 BK-1 203-HA4 BK-1 950-HA3 BR-1 111-PW70 RD-1
CONN TO 86 85 PW-C23
450-PJ7 YL-075-FLRY 3 2 203-HA6 BK-1 203-HA7 BK-1 3103046 118-PW35 GY-1.5
PJ-C1 ALTERNATOR TRIGGER SWITCH COMPONENT
E587-PJ8 WH-075-FLRY 4 (60) HAMMER SW 123-PW94 WH-1
2502633 524-3249 30 87
CONN 7 A110-PJ2 RD-075-FLRY E587-PJ9 WH-075-FLRY 5 950-HA3 BR-1 4494976 J881-PW93 YL-1 123-PW98 WH-1
1 A110-PJ1 RD-075-FLRY A110-PJ1 RD-075-FLRY A110-PJ3 RD-075-FLRY 6 123-PW111 WH-1
TO SIDE-CONSOLE HARN 2 203-HA7 BK-1 951-HA5 PK-1 203-HA4 BK-1
7 87A 200-PW105 BK-1
201-PJ4 BK-075-FLRY
CONN CR-C17 3
450-PJ7 YL-075-FLRY 201-PJ5 BK-075-FLRY 200-PW106 BK-1
(LOC C-6) 4 (36) PARK BRAKE ALARM RLY
201-PJ4 BK-075-FLRY 201-PJ6 BK-075-FLRY 2
202-PW110 BK-1
TO MATING CONNECTOR 119-HA2 RD-1 2872808 200-PW141 BK-1
PJ-C3 (6) PRODUCT LINK PL240 3
505-6727 202-PW112 BK-1
450-PJ7 YL-075-FLRY 3315048 E727-PW114 BU-1 202-PW113 BK-1
A110-PJ3 RD-075-FLRY 1 RD POWER HA-C1 P915-PW118 PK-1
E587-PJ8 WH-075-FLRY 201-PJ6 BK-075-FLRY 2 BK GROUND 1429117 G763-PW99 PU-1 202-PW88 BK-1
E587-PJ8 WH-075-FLRY 3 WH KEY ON (16) HAMMER GND 86 85 PW-C26 306-PW95 GN-1
E587-PJ9 WH-075-FLRY 4 BU ENGINE CRANK
3103046 307-PW17 OR-1
E587-PJ9 WH-075-FLRY 5 (57) FOOT SW 30 87
322-PW117 GY-1
6 2Q-4703 202-PW110 BK-1 367-PW144 BU-1
NOTE A 419-PW71 YL-1
2 87A
1
500-PW28 BR-1
501-PW30 GN-1
I 951-HA5 PK-1
950-HA3 BR-1
(34) NEUTRAL LOCK ALR RLY
2872808
502-PW27 OR-1
506-PW131 PU-1
I
537-PW72 GN-1
923-PW82 GY-1 537-PW74 GN-1
PL240 JUMPER 123-PW111 WH-1 568-PW9 GN-1
(ATCH) HAMMER ATCH 766-PW61 GN-1 605-PW44 YL-1
86 85 PW-C30 606-PW49 GY-1
3103046 607-PW24 PK-1.5
30 87
610-PW122 OR-1
610-PW124 OR-1.5
JV-C1 J881-PW92 YL-1 611-PW125 PU-1.5
2502642 87A 615-PW142 GN-1.5
TURN YL-1 1 605-JV4 YL-1 615-PW143 GN-1.5
TAIL OR-1 2 617-JV7 BR-1 PW-C6 (35) NEUTRALIZER RELAY 619-PW130 GN-1.5
REV GY-1 3 615-JV11 GN-1 3103009 101-PW116 RD-6 2872808 752-PW133 YL-1
STOP BK-1 4 604-JV12 OR-1 102-PW136 RD-1.5 754-PW54 BU-1
1 200-PW37 BK-1.5 103-PW115 RD-6 101-PW116 RD-6 J881-PW100 YL-1 754-PW55 BU-1
REAR LH STOP TAIL TURN LAMP 2 367-PW21 BU-1 105-PW15 RD-1 102-PW136 RD-1.5 330-PW109 YL-1 766-PW61 GN-1
304-4681 CONN 11 3 604-PW38 OR-1 103-PW115 RD-6 202-PW112 BK-1 923-PW80 GY-1
4 605-PW39 YL-1 110-PW66 RD-1.5 86 85 PW-C31 923-PW82 GY-1
TO REAR HARN 5 606-PW40 GY-1 110-PW66 RD-1.5 110-PW65 RD-1 A607-PW26 PK-1.5 128-EF8 PK-1
CONN JV-C5 3103046
6 615-PW41 GN-1.5 110-PW65 RD-1 110-PW139 RD-1 A615-PW97 GN-1.5 RH HEADLIGHT AS.
JV-C2 (LOC H-13) 7 617-PW42 BR-1 110-PW139 RD-1 110-PW140 RD-1
30 87
E727-PW114 BU-1 250-2657 309-EF2 GY-1
2497415 8 618-PW43 YL-1 110-PW20 RD-1 110-PW140 RD-1 111-PW70 RD-1 202-PW113 BK-1 G763-PW99 PU-1 RL-C2
TO MATING CONNECTOR
BK-1 1 200-JV15 BK-1 9 367-PW144 BU-1 110-PW64 RD-1.5 113-PW32 OR-1 87A J881-PW92 YL-1 2474363 752-EF12 YL-1
WH-1 2 618-JV14 YL-1 10 H771-PW11 BR-1 118-PW35 GY-1.5 J881-PW93 YL-1 LOW
JV-C5 111-PW69 GN-1.5 123-PW132 WH-1 (32) LOW SIDE CONTROL RELAY J881-PW100 YL-1 619-RL5 GN-1.5 1 GN HIGH 923-EF11 GY-1
NUMBER PLATE LIGHT 3103003 111-PW70 RD-1 128-PW134 PK-1 2872808 J881-PW108 YL-1 611-RL4 PU-1.5 2 RD
238-4530 200-JV15 BK-1 111-PW67 RD-1 200-PW105 BK-1 P915-PW118 PK-1 200-RL2 BK-1.5 3 BK
TURN
200-JV13 BK-1 200-JV1 BK-1.5 200-JV1 BK-1.5 1 PW-C5 111-PW68 RD-1 200-PW106 BK-1 110-PW140 RD-1 606-RL8 GY-1 4 BR
200-JV10 BK-1 367-JV21 BU-1 2 CONN 13 1552269 200-PW141 BK-1 110-PW139 RD-1 200-RL1 BK-1.5 5 BU
JV-C4 604-JV3 OR-1 3 NOTE C 1 113-PW33 OR-1 113-PW5 OR-1 202-PW84 BK-1.5 320-PW138 OR-1 110-PW65 RD-1 CONN 21 200-RL2 BK-1.5 618-RL6 YL-1 6
POSN
200-EF17 BK-2.5
2502642 367-JV22 BU-1 605-JV4 YL-1 4
CONN 11 (NOT USED) 2 200-PW36 BK-1 113-PW33 OR-1 202-PW88 BK-1 110-PW139 RD-1 PW-C9 RL-C1 605-RL9 YL-1
TO PLATFORM HARN 86 85 PW-C32 2497452 2474362
TURN YL-1 1 606-JV5 GY-1 367-JV2 BU-1 367-JV21 BU-1 606-JV5 GY-1 5 113-PW31 OR-1 202-PW89 BK-1.5 3103046 110-PW140 RD-1 606-RL8 GY-1
CONN PW-C6
TAIL OR-1 2 618-JV18 YL-1 615-JV6 GN-1.5 6 113-PW32 OR-1 202-PW90 BK-1.5 111-PW70 RD-1 611-PW129 PU-1.5 1 611-RL12 PU-1.5
(LOC H-12) 30 87
615-JV19 GN-1 604-JV20 OR-1 617-JV7 BR-1 202-PW110 BK-1 322-PW117 GY-1 118-PW35 GY-1.5 202-PW84 BK-1.5 200-RL2 BK-1.5 611-RL12 PU-1.5 611-RL4 PU-1.5
H STOP
REV GY-1
BK-1
3
4 604-JV20 OR-1 604-JV12 OR-1 604-JV3 OR-1 618-JV8 YL-1
7
8 TO MATING CONNECTOR 115-PW29 RD-1.5 202-PW112 BK-1
87A
619-PW130 GN-1.5
2
3 619-RL3 GN-1.5 611-RL11 PU-1.5
LH HEADLIGHT AS.
250-2657
(14) ENGINE GND
H
367-JV22 BU-1 9 PW-C14 115-PW57 RD-1 202-PW113 BK-1 123-PW132 WH-1 617-PW51 BR-1.5 4 617-RL7 BR-1 RL-C3
605-JV4 YL-1 H771-JV9 BR-1 10 3103009 115-PW77 RD-1.5 304-PW119 WH-4 123-PW98 WH-1 618-PW52 YL-1 5 618-RL6 YL-1 617-RL7 BR-1 2474363
REAR RH STOP TAIL TURN LAMP 606-JV5 GY-1 306-PW95 GN-1 (31) HORN RLY 123-PW94 WH-1 606-PW47 GY-1 6 606-RL8 GY-1 618-RL6 YL-1 NOTE A
LOW
304-4682 1 105-PW15 RD-1 116-PW19 BR-1.5 307-PW17 OR-1 2872808 123-PW111 WH-1 605-PW45 YL-1 7 605-RL9 YL-1 619-RL10 GN-1.5 1 GN HIGH
615-JV11 GN-1 2 450-PW16 YL-1 309-PW7 GY-1 202-PW89 BK-1.5 8 200-RL1 BK-1.5 619-RL5 GN-1.5 611-RL11 PU-1.5 2 RD
615-JV19 GN-1 615-JV6 GN-1.5
CONN 14 3 307-PW17 OR-1 117-PW18 YL-1.5 367-PW144 BU-1 A615-PW97 GN-1.5 200-PW105 BK-1 619-RL3 GN-1.5 619-RL10 GN-1.5 200-RL1 BK-1.5 3 BK
TO SIDE-CONSOLE HARN TURN
4 117-PW18 YL-1.5 405-PW1 GY-1 923-PW80 GY-1 200-PW106 BK-1 605-RL9 YL-1 4 BR
617-JV7 BR-1 CONN CR-C7 5 116-PW19 BR-1.5 406-PW3 PU-1 754-PW54 BU-1 200-PW141 BK-1 5 BU EF-C6
(20) REAR HORN + 367-JV2 BU-1 (LOC D-6) 6 110-PW20 RD-1 118-PW25 GY-1 419-PW71 YL-1 202-PW88 BK-1 617-RL7 BR-1 6
POSN 2497480 CONN 24
86 85 PW-C21
437-1160 - 200-JV13 BK-1 618-JV14 YL-1 TO MATING CONNECTOR 7 367-PW21 BU-1 118-PW34 GY-1.5 419-PW126 YL-1 3103046 202-PW110 BK-1 128-EF27 PK-1 1 RETURN TO DIG
618-JV18 YL-1 618-JV8 YL-1 JV-C6 8 E727-PW114 BU-1 441-PW13 OR-1 202-PW112 BK-1 762-EF24 YL-1 2 (NOT USED)
1552269 30 87
9 118-PW35 GY-1.5 447-PW8 PK-1 615-PW142 GN-1.5 202-PW113 BK-1
H771-JV9 BR-1 1 RD-1 (49) SIDE SHIFT LOCK SOL 10 332-PW22 BU-1 450-PW16 YL-1 306-PW95 GN-1
H771-JV9 BR-1 200-JV10 BK-1 2 RD-1 3E-8622 123-PW132 WH-1 500-PW28 BR-1 87A 307-PW17 OR-1 ROADING LIGHTS EF-C5
322-PW117 GY-1 1552269
128-PW134 PK-1 501-PW30 GN-1 (37) REVERSE LAMP RLY 367-PW144 BU-1 762-EF24 YL-1 1 BK-1 (46) BUCKET POS SOL
PW-C15 287-2808
2497446
158-PW2 BR-1.5 502-PW27 OR-1 419-PW71 YL-1 200-EF18 BK-1 2 BK-1 3E-8620
REAR 506-PW131 PU-1 500-PW28 BR-1
1 405-PW1 GY-1 170-PW23 RD-1 537-PW72 GN-1 607-PW24 PK-1.5 501-PW30 GN-1
2 158-PW2 BR-1.5 537-PW73 GN-1 200-PW105 BK-1 502-PW27 OR-1
3 406-PW3 PU-1 184-PW10 BU-1 537-PW74 GN-1 610-PW122 OR-1 506-PW131 PU-1
CONN 15 4 568-PW9 GN-1 537-PW72 GN-1 (73) XMSN NEUTRAL LOCK SW
TO SIDE-CONSOLE HARN 86 85 PW-C20 EF-C18
5 113-PW5 OR-1 605-PW44 YL-1 3103046 537-PW74 GN-1 169-0588 3103044
CONN CR-C8 6 200-PW6 BK-1 200-PW101 BK-4 605-PW45 YL-1 568-PW9 GN-1 102-CF1 RD-1.5
(LOC C-6) 30 87 7 8
7 309-PW7 GY-1 200-PW102 BK-4 605-PW46 YL-1 605-PW44 YL-1 200-CF26 BK-1 614-CF44 PU-1 X752-EF37 GY-1 1 (52) REVERSE DIODE REVERSE
TO MATING CONNECTOR 8 447-PW8 PK-1 200-PW6 BK-1 606-PW47 GY-1 A607-PW26 PK-1.5 606-PW49 GY-1 110-CF3 RD-1.5 1
923-EF38 GY-1 2 3199610
200-PW36 BK-1 200-PW141 BK-1 87A 607-PW24 PK-1.5
9 568-PW9 GN-1 606-PW48 GY-1 110-CF21 RD-1 2
3
10 184-PW10 BU-1 200-PW37 BK-1.5 200-PW105 BK-1 606-PW49 GY-1 610-PW122 OR-1 110-CF17 RD-1 113-CF25 OR-1 3
4
11 H771-PW11 BR-1 200-PW79 BK-1.5 200-PW106 BK-1 607-PW24 PK-1.5 (28) STD FLOOD LAMP RELAY 610-PW124 OR-1.5 G763-CF5 PU-1
12 614-PW12 PU-1 614-PW78 PU-1 287-2808 611-PW125 PU-1.5 CONN 20 113-CF24 OR-1 5
4
EF-C19
13 441-PW13 OR-1 202-PW85 BK-1 615-PW143 GN-1.5 615-PW142 GN-1.5 PW-C7 CF-C7 113-CF13 OR-1 113-CF23 OR-1 200-CF28 BK-1 3103044
14 308-PW14 YL-1 202-PW87 BK-1 202-PW84 BK-1.5 615-PW142 GN-1.5 PW-C33 615-PW143 GN-1.5 2497446 2497421 113-CF25 OR-1 6
766-CF8 GN-1
202-PW59 BK-1 202-PW88 BK-1 617-PW51 BR-1.5 3103046 619-PW130 GN-1.5 752-EF34 YL-1 1 (51) REVERSE DIODE FORWARD
202-PW62 BK-1 202-PW89 BK-1.5 618-PW52 YL-1 (27) FLASHER REAR HORN GROUND 4 200-PW141 BK-1 752-PW133 YL-1 G763-PW99 PU-1 1 G763-CF5 PU-1 200-CF34 BK-1 CF-C1 923-EF36 GY-1 2 3199610

G 202-PW83 BK-4 202-PW90 BK-1.5

202-PW110 BK-1
754-PW54 BU-1
754-PW55 BU-1
4371708 OUT (HORN) 2
+ BATTERY 6
367-PW144 BU-1
615-PW143 GN-1.5
754-PW54 BU-1
754-PW55 BU-1
419-PW126 YL-1
110-PW66 RD-1.5
2
3
419-CF4 YL-1
110-CF3 RD-1.5
200-CF2 BK-1.5 200-CF30 BK-1 1429117 3
4 G
(40) START RLY PL-C5 202-PW112 BK-1 754-PW56 BU-1 766-PW61 GN-1 610-PW127 OR-1.5 4 610-CF9 OR-1.5 200-CF31 BK-1 766-CF8 GN-1 VALVE GP
3103017 PL-C4 PW-C29 202-PW113 BK-1 766-PW61 GN-1 923-PW80 GY-1 766-PW135 GN-1 5 766-CF8 GN-1 200-CF32 BK-1 G763-CF5 PU-1 2238181
1409378
3103027 3853303 766-PW135 GN-1 PW-C25 923-PW82 GY-1 537-PW73 GN-1 6 537-CF7 GN-1 200-CF33 BK-1 614-CF44 PU-1 EF-C2
A A615-PW97 GN-1.5 304-PW119 WH-4 923-PW80 GY-1 3103046 A607-PW26 PK-1.5 611-PW128 PU-1 7 611-CF6 PU-1 200-CF26 BK-1 1552269
85 86
3 200-PL45 BK-1 B 158-PW2 BR-1.5 306-PW95 GN-1 923-PW81 GY-1 (26) FLASHER BATTERY + 4 111-PW70 RD-1 A615-PW97 GN-1.5 113-PW32 OR-1 8 113-CF13 OR-1 200-CF28 BK-1 610-CF40 OR-1.5
1 306-PL15 GN-1 C 332-PW22 BU-1 307-PW17 OR-1 923-PW82 GY-1 2872807 LAMP OUTPUT 2 537-PW72 GN-1 E727-PW114 BU-1 614-PW78 PU-1 9 614-CF12 PU-1 200-CF29BK-1 614-CF42 PU-1 752-EF35 YL-1 1 RD-1 (47) FWD XMSN SOL
87 30
5 108-PL29 RD-4 D 128-PW134 PK-1 308-PW14 YL-1 A607-PW26 PK-1.5 GROUND 6 200-PW106 BK-1 G763-PW99 PU-1 606-PW48 GY-1 10 606-CF11 GY-1 200-CF18 BK-1 923-EF13 GY-1 2 RD-1 117-2911
START RELAY
87A
2 2872814 E 113-PW31 OR-1 A615-PW97 GN-1.5 J881-PW92 YL-1 605-PW46 YL-1 11 605-CF10 YL-1 (59) FRONT ROADING LAMP SW
20 10 EF-C3
4 304-PL3 WH-4 108-PL29 RD-4 25 101-PL30 RD-4 F 123-PW132 WH-1 309-PW7 GY-1 E727-PW114 BU-1 J881-PW93 YL-1 443-PW137 YL-1 12 443-CF16 YL-1 169-0594
CABIN FAN G 184-PW10 BU-1 332-PW22 BU-1 J881-PW100 YL-1 460-PW123 YL-1 13 460-CF15 YL-1 419-CF4 YL-1 1552269
(5) FNR SW 7 NOTE E
2872811 H 617-PW50 BR-1 PW-C3 J881-PW108 YL-1 450-PW120 YL-1 14 443-CF16 YL-1 200-CF31 BK-1
332-PL7 BU-1 19
10 9
106-PL38 GY-1
CONN 1 I 618-PW53 YL-1 3985582 1552252 460-CF15 YL-1 X752-EF31 GY-1 1 RD-1 (48) RVS XMSN SOL
TO FUSE BOX HARN J 614-PW96 PU-1.5 367-PW21 BU-1 1 537-CF7 GN-1 110-CF21 RD-1
2
923-EF30 GY-1 2 RD-1 130-0912
FR STD FLOOD
2872812
CONN PL-C3 K 614-PW91 PU-1.5 367-PW144 BU-1 2
3
614-CF42 PU-1
(33) MAIN RLY(K5) 18 (LOC D-16)
158-PL6 BR-1.5 15 7 L 308-PW14 YL-1 405-PW1 GY-1 3 202-PW88 BK-1 605-CF10 YL-1 605-CF37 YL-1
1409378 5
REV LAMP TO MATING CONNECTOR M 306-PW95 GN-1 406-PW3 PU-1 HORN 4 101-PW116 RD-6 605-CF36 YL-1 102-CF1 RD-1.5 6
2872811 N 116-PW19 BR-1.5 5 320-PW138 OR-1 102-PW136 RD-1.5 PW-C8 CF-C8 610-CF40 OR-1.5
85 86 17 8
8 200-PL46 BK-1 A615-PL5 GN-1.5 10 104-PL36 RD-2.5 P 118-PW34 GY-1.5 419-PW63 YL-1 6 103-PW115 RD-6 2497480 2497460 606-CF11 GY-1 606-CF38 GY-1
6 308-PL14 YL-1 R 117-PW18 YL-1.5 419-PW71 YL-1 F 7 307-PW17 OR-1 110-PW66 RD-1.5 102-PW136 RD-1.5 1 102-CF1 RD-1.5 606-CF39 GY-1 EF-C17
87 30 KEY START N
10 103-PL34 RD-2.5 2872810 S 102-PW136 RD-1.5 419-PW126 YL-1 8 306-PW95 GN-1 113-PW32 OR-1 202-PW90 BK-1.5 2 200-CF2 BK-1.5 CF-C2 1552267
16 6 R N
87A
7 105-PL24 RD-1 5 T 110-PW64 RD-1.5 9 123-PW94 WH-1 128-PW134 PK-1 610-CF9 OR-1.5 610-CF40 OR-1.5 1429117 NOTE E
9 106-PL37 GY-2.5 U 170-PW23 RD-1 441-PW13 OR-1 F 10 754-PW55 BU-1 202-PW84 BK-1.5 CONN 19 610-CF41 OR-1 X752-EF32 GY-1 A
SIGNAL LAMP
2872811 V 115-PW29 RD-1.5 447-PW8 PK-1
N
11 330-PW109 YL-1 202-PW89 BK-1.5 A610-CF48 OR-1 923-EF33 GY-1 B CONN 23
15 5 N
111-PL23 RD-1 10 101-PL31 RD-2.5 W 111-PW69 GN-1.5 450-PW16 YL-1 R 12 752-PW133 YL-1 202-PW90 BK-1.5 611-CF6 PU-1 614-CF46 PU-1 C

RADIO ACCES.
X 105-PW15 RD-1 500-PW28 BR-1 304-PW119 WH-4 (56) FOG LAMP SW
14
2872811 4
501-PW30 GN-1 309-PW7 GY-1 614-CF19 PU-1 169-0611
(39) RR AUX LAMP RLY PL-C6 115-PL22 RD-1.5 10 TO MATING CONNECTOR 502-PW27 OR-1 (64) COMBINATION SW 322-PW117 GY-1 614-CF42 PU-1 7 8
3103017 PW-C28 506-PW131 PU-1 415-3742 405-PW1 GY-1 614-CF44 PU-1 200-CF29 BK-1 614-CF46 PU-1
1409378 DOME LAMP 3853301 EF-C16
13
2872811 3 CONN 2 406-PW3 PU-1 614-CF46 PU-1 3103044
170-PL21 RD-1 10
TO FUSE BOX HARN
A 200-PW101 BK-4 537-PW73 GN-1 419-PW126 YL-1 614-CF12 PU-1 614-CF47 PU-1 2
85 86
3 200-PL43 BK-1 HORN/MISC CONN PL-C2
B 537-PW72 GN-1 MOM
FLASH B+ 441-PW13 OR-1 614-CF45 PU-1 610-CF41 OR-1 3
X752-EF29 GY-1 1 (9) REVERSE DIODE
1 338-PL50 PK-1 12
2872812
(LOC D-16)
C 304-PW119 WH-4 537-PW74 GN-1 443-PW137 YL-1 A610-CF48 OR-1 754-EF10 BU-1 2 3199610
87 30 2
5 A117-PL28 YL-1.5 110-PL20 RD-1.5 15 101-PL32 RD-4 MOM
WASHER 766-CF8 GN-1 3
87A
2 HEAD LAMP FR
568-PW9 GN-1 HI BEAM 447-PW8 PK-1 4

F 4 117-PL18 YL-1.5
102-PL19 RD-1.5
11
15
2872812
1 CONN 3
TO FUSE BOX HARN
PW-C27
3853305 604-PW75 OR-1 HEADLAMP B+ 450-PW120 YL-1
A610-CF48 OR-1
F
1 101-PW116 RD-6 604-PW38 OR-1 450-PW16 YL-1 450-PW121 YL-1 G763-CF5 PU-1 CF-C3
PARK RIGHT CONN PL-C1
2872810 2 103-PW115 RD-6 604-PW76 OR-1 LO BEAM 1429117
36 46 (LOC D-16) PW-C4
618-PL13 YL-1 5 614-PL52 PU-1.5 460-PW123 YL-1
605-PW44 YL-1 1552252 606-CF38 GY-1 EF-C4
(29) FR LAMP RLY PARK LEFT TO MATING CONNECTOR
PW-C16 2497415
1409378 2872810 605-PW45 YL-1 1 110-PW65 RD-1 537-PW73 GN-1 605-CF36 YL-1
617-PL12 BR-1
35
5
45
614-PL51 PU-1.5 2497452 605-PW39 YL-1 605-PW46 YL-1 2 506-PW131 PU-1 605-PW45 YL-1 LAMP FUNCTION 614-CF47 PU-1 460-EF14 YL-1 1 YL-1 (+) (45) SPEED SENSOR
1 170-PW23 RD-1 3 611-PW125 PU-1.5 605-PW46 YL-1 L1 PARK BRAKE (61) HAZARD SW 200-EF21 BK-1 2 BK-1 (-) 2390844
85 86
200-PL44 BK-1
REAR LAMP AUX. CONN 5 2 607-PW24 PK-1.5 606-PW40 GY-1 4 610-PW124 OR-1.5 606-PW47 GY-1
8
34 2872812
44 TO HEADLINER HARN (22) LAMP GP FUNCTION L2 NOT USED 169-0589
6 338-PL49 PK-1 A117-PL28 YL-1.5 15 3 118-PW25 GY-1 606-PW47 GY-1 5 619-PW130 GN-1.5 606-PW48 GY-1 2236542 L3 NOT USED
87 30 CONN TR-C2 10 8
10 101-PL33 RD-2.5 4 A607-PW26 PK-1.5 606-PW48 GY-1 PARK SW 6 500-PW28 BR-1 200-CF33 BK-1 614-CF47 PU-1
87A REAR LAMP STD (LOC C-16) L4 RIGHT TURN
7
33
2872812
43
5 502-PW27 OR-1 606-PW49 GY-1 LO WIPER 7 501-PW30 GN-1 610-PW127 OR-1.5
9 104-PL36 RD-2.5 A116-PL27 BR-1.5 15 103-PL35 RD-4 TO MATING CONNECTOR 6 500-PW28 BR-1 WIPER B+ 8 118-PW35 GY-1.5 L5 HIGH BEAM 2 (42) COOLENT TEMP SENDER
FR WASHER/WIPER
7 115-PW57 RD-1 607-PW24 PK-1.5 LEFT 9 605-PW44 YL-1 610-PW124 OR-1.5 L6 LEFT TURN 200-EF23 BK-1
3 2872804
32
2872812 8 501-PW30 GN-1 10 606-PW49 GY-1 610-PW122 OR-1 605-CF36 YL-1 T
42
A118-PL26 GY-1.5 15 614-PW12 PU-1 11 537-PW74 GN-1 L4 L1
5
614-PW91 PU-1.5 614-PW78 PU-1 RIGHT 12 502-PW27 OR-1 611-PW129 PU-1.5 CF-C6 537-CF7 GN-1 441-EF5 OR-1
REAR HYD. PW-C17 17
PL-C7 2872811 614-PW96 PU-1.5 TURN B+ 611-PW128 PU-1 1552264 606-CF38 GY-1
(30) FRONT WIPER RLY 31 41 2497450
1409378 3103017 184-PL11 BU-1 10 CONN 16 HI WIPER 611-PW125 PU-1.5 RD 1 113-CF24 OR-1
TRANSMISSION
A 506-PW131 PU-1 615-PW41 GN-1.5 OR 2 419-CF4 YL-1 CF-C4
FRONT WIPER WASHER MOTOR B 615-PW142 GN-1.5 614-PW78 PU-1 BK 3 200-CF34 BK-1 1387675
2872811
85 86
200-PL41 BK-1 123-PL10 WH-1
30
10
40
106-PL39 GY-2.5 (NOT USED) C 202-PW85 BK-1 615-PW143 GN-1.5 617-PW51 BR-1.5 L5 L2 PK 4 611-CF6 PU-1 406-EF7 PU-1 (55) COOLANT TEMPERATURE SW
3
1 338-PL47 PK-1 INDICATOR/MONITOR
618-PW52 YL-1 WH 5 T 2033219
87 30
5 A118-PL26 GY-1.5 29
2872811 39
617-PW50 BR-1 617-PW51 BR-1.5 619-PW130 GN-1.5 PU 6 200-EF19 BK-1
87A
113-PL9 OR-1 10 (72) XMSN NEUTRAL SW 617-PW42 BR-1 (8) NEUTRAL ALARM DIODE PW-C24 752-PW133 YL-1 YL 7 605-CF37YL-1 CF-C11
2
118-PL17 GY-1.5 9R-9868 319-9610 3103044 754-PW56 BU-1 GN 8 606-CF39 GY-1 249-7480
4 RELAY COIL
PW-C18
CONN 22 (66) ENGINE OIL PRESS SWITCH
2872810 618-PW53 YL-1 618-PW52 YL-1 1 J881-PW108 YL-1 766-PW135 GN-1 200-CF32 BK-1 1 405-EF4 GY-1
28 38 1552269 618-PW43 YL-1 P915-PW118 PK-1 923-PW81 GY-1 A610-CF48 OR-1 NOT USED 7W1238
338-PL25 PK-1 5 106-PL40 GY-2.5 2 L6 L3 2

BUCKET POSITION
1 766-PW60 GN-1 3 G763-PW99 PU-1
27 2872810 37
2 202-PW87 BK-1 754-PW54 BU-1 4
128-PL8 PK-1 5 754-PW55 BU-1 J881-PW92 YL-1 EF-C7
(38) RR STD RLY 2497415
1409378 PRODUCT LINK
754-PW56 BU-1 J881-PW93 YL-1
25
2872810 26
(63) LOADER NEUT SW J881-PW100 YL-1 1
2

447-EF6 PK-1 1 PK-1

A110-PL53 WH-075-FLRY 5 103-PL54 RD-075-FLRY 9R-9868 766-PW61 GN-1 J881-PW108 YL-1 200-EF22 BK-1 2 BK-1 (43) FUEL LEVEL SENDER
85 86 PW-C12
8 200-PL42 BK-1 766-PW58 GN-1 766-PW135 GN-1 110-CF17 RD-1 1878936
E 87 30
6
10
338-PL48 PK-1
A116-PL27 BR-1.5
21 22
1552269
1 766-PW58 GN-1
766-PW60 GN-1
113-CF23 OR-1
E
87A
7 2 202-PW59 BK-1 923-PW80 GY-1 OPERATOR PLATFORM (13) CONVERTER TEMP GAUGE
9 116-PL16 BR-1.5 23 24
923-PW81 GY-1 2872802 113-CF24 OR-1
-
200-EF20 BK-1 + (19) FORWARD HORN
923-PW82 GY-1 3-IGN 200-CF18 BK-1 322-EF9 GY-1 2502652
(65) PARK BRAKE SW
(3) FUSE BLK 154-5416
PW-C13
3E3364
2-SEND
A607-PW26 PK-1.5 200-CF30 BK-1
BK-18 1 419-PW63 YL-1 A615-PW97 GN-1.5 4-GND CF-C10 (44) CONV TEMP SNDR
FUSE RELAY BLK BK-18 2 202-PW62 BK-1 E727-PW114 BU-1 (21) LAMP GP BASIC 2497477 200-CF34 BK-1 443-EF3 YL-1 2872805
H771-PW11 BR-1 223-6539
PL-C3
T (3985572 FOR C90 TRANSMISSION)
1 614-CF45 PU-1 443-CF16 YL-1
3853297 101-PL1 RD-6 LAMP FUNCTION 2 443-CF16 YL-1
A A615-PL5 GN-1.5 101-PL33 RD-2.5 (53) BRAKE SW 1 B+ L1 LOW OIL PRESSURE 3 113-CF23 OR-1 419-CF4 YL-1
B 158-PL6 BR-1.5 101-PL30 RD-4 105-8034 PW-C1 GND 4 200-CF30 BK-1
1082253
L2 HIGH COOLANT TEMP
C 332-PL7 BU-1 101-PL31 RD-2.5 605-CF37 YL-1
D 128-PL8 PK-1 101-PL32 RD-4 A 111-PW67 RD-1 L2
L3 LOW BRAKE FLUID EF-C15 (41) EXCITATION RESISTOR
E 113-PL9 OR-1 B L6 L4 NOT USED 606-CF39 GY-1 3783485 3783486
F 123-PL10 WH-1 103-PL2 RD-6 C 604-PW75 OR-1 L5 ALTERNATOR FAIL 128-EF28 PK-1 1
G 184-PL11 BU-1 103-PL34 RD-2.5 (50) SPEEDOMETER CF-C9 611-CF6 PU-1 2
L6 NOT USED 2822183 2497431
H 617-PL12 BR-1 103-PL35 RD-4 L3 L6 309-EF26 GY-1 3
I 618-PL13 YL-1 103-PL54 RD-075-FLRY SIG YL-1 1 460-CF15 YL-1 614-CF19 PU-1
CONN 1 J 614-PL51 PU-1.5 GROUND BK-1 2 200-CF18 BK-1 (1) ALTERNATOR
K 614-PL52 PU-1.5 104-PL36 RD-2.5 (54) BRAKE SW 2 + BATTERY RD-1 3 110-CF17 RD-1 614-CF45 PU-1 2409391
TO PLATFORM HARN L 308-PL14 YL-1 105-8034 PW-C2 PU-1 4 614-CF19 PU-1 EF-C14
+
CONN PW-C29 1082253 CR-C3 2497465
M 306-PL15 GN-1 106-PL38 GY-1 - 5
(LOC G-12) 1552252
N 116-PL16 BR-1.5 106-PL40 GY-2.5 A 111-PW68 RD-1 L2 L5 6 309-EF25 GY-1 1 L

TO MATING CONNECTOR P 118-PL17 GY-1.5 106-PL37 GY-2.5 106-PL39 GY-2.5 B RD 1 113-CR24 OR-1 IG
R 117-PL18 YL-1.5 C 604-PW76 OR-1 L1 BK 2 200-CR27 BK-1 CR-C16 450-EF1 YL-1 2 P
S 102-PL19 RD-1.5 L4 BU 3 406-CR3 PU-1 2497480 CONN 4 B+
T 110-PL20 RD-1.5 116-PL16 BR-1.5 OR 4 A110-CR71 WH-1 1 TO FUSE BOX HARN 101-EF16 RD-16
U 170-PL21 RD-1 WH 5 405-CR1 GY-1 2 CONN PL-C8
V 115-PL22 RD-1.5 117-PL18 YL-1.5 L1 L4 GN 6 (LOC D-16)
W 111-PL23 RD-1 L5 PK 7 309-CR37 GY-1 101-EF16 RD-16
X 105-PL24 RD-1 118-PL17 GY-1.5 EXT ALARM YL 8 568-CR9 GN-1 CR-C7
TO MATING CONNECTOR
FRONT CONSOLE 304-EF15 WH-4
(25) POWER PORT
115-PW77 RD-1.5 EXT ALARM PU 9 E727-CR60 BU-1 3103003
D TO MATING CONNECTOR
PL-C2
304-PL3 WH-4
388-5263
200-PW79 BK-1.5 L3 DKBU 10
11
483-CR4 BR-1
309-CR36 GY-1
110-CR61 RD-1 110-CR20 RD-1
110-CR62 RD-1 105-CR16 RD-1 1
G S
D
CONN 2 3853294 306-PL15 GN-1 12 450-CR15 YL-1 2

TO PLATFORM HARN A 200-PL4 BK-2.5 113-CR24 OR-1 113-CR5 OR-1 307-CR17 OR-1 3
CONN 14 ENGINE MTR BAT
CONN PW-C28 B 308-PL14 YL-1 113-CR25 OR-1 117-CR18 YL-1.5 4 (24) STARTER
TO PLATFORM HARN
(LOC F-12) C 304-PL3 WH-4 113-CR23 OR-1 116-CR19 BR-1.5 5 2409397
CONN PW-C14
200-PL46 BK-1 110-CR20 RD-1 6
(LOC H-12) MOTOR
200-PL42 BK-1 200-CR27 BK-1 200-CR35 BK-1 367-CR21 BU-1 7
CONN 3 PL-C1 200-PL4 BK-2.5 200-CR33 BK-1 200-CR28 BK-1 E727-CR60 BU-1 8 TO MATING CONNECTOR 128-EF28 PK-1
TO PLATFORM HARN 3853299 200-PL45 BK-1 200-CR29 BK-1 200-CR32 BK-1 9 128-EF8 PK-1
CONN PW-C27 1 103-PL2 RD-6 200-PL41 BK-1 200-PW102 BK-4 200-CR31 BK-1 332-CR22 BU-1 10 128-EF27 PK-1
(LOC F-12) 2 101-PL1 RD-6 200-PL43 BK-1 202-PW83 BK-4 200-CR30 BK-1
TO MATING CONNECTOR
200-PL44 BK-1 200-CR59 BK-1 200-EF17 BK-2.5
200-CR31 BK-1 200-CR72 BK-1 CR-C8 200-EF18 BK-1
PL-C8 338-PL25 PK-1 (17) RH CAB FENDER GND (12) METER AS. 200-CR6 BK-1 200-EF19 BK-1
2497421
2497460 338-PL50 PK-1 444-0154 2 110-CR61 RD-1 200-EF20 BK-1 ENGINE
CONN 4 3

TO SIDE-CONSOLE HARN 1 A110-PL53 WH-075-FLRY 338-PL48 PK-1 1 4 614-CR48 PU-1 309-CR36 GY-1 309-CR7 GY-1 405-CR1 GY-1 1 200-EF23 BK-1
CONN CR-C16 2 338-PL47 PK-1 309-CR37 GY-1 158-CR2 BR-1.5 2 200-EF21 BK-1
(LOC D-6) 338-PL49 PK-1 NOTE A CR-C4 5 6
406-CR3 PU-1 3 200-EF22 BK-1
338-PL25 PK-1 2497431 405-CR1 GY-1 483-CR4 BR-1 4
TO MATING CONNECTOR 113-CR5 OR-1 5
CONN 15 309-EF25 GY-1 CBL-PP1 RD-00
614-PL51 PU-1.5 450-CR69 YL-1 406-CR3 PU-1 200-CR6 BK-1 6
TO PLATFORM HARN 309-EF2 GY-1
614-PL52 PU-1.5 309-CR7 GY-1 7
CONN PW-C15 309-EF26 GY-1
450-CR68 YL-1 447-CR8 PK-1 8
(LOC G-12)
(11) FUEL LEVEL GAUGE 450-CR69 YL-1 450-CR15 YL-1 568-CR9 GN-1 9 752-EF35 YL-1
TO MATING CONNECTOR
OPERATOR PLATFORM 287-2803 184-CR10 BU-1 10 1
2

752-EF34 YL-1
441-CR13 OR-1 H771-CR58 BR-1 11 752-EF12 YL-1
3-IGN
447-CR8 PK-1 614-CR12 PU-1 12
FUSE BOX AND RELAYS 2-SEND 483-CR4 BR-1 441-CR13 OR-1 13 762-EF24 YL-1
568-CR9 GN-1 308-CR14 YL-1 14
4-GND CR-C5 614-CR48 PU-1
2497477 614-CR47 PU-1 923-EF11 GY-1
614-CR49 PU-1 923-EF13 GY-1
1 614-CR49 PU-1 E727-CR60 BU-1 923-EF30 GY-1
TR-C7 (71) TOGGLE SW FAN
2497415
2 447-CR8 PK-1 1
2

923-EF38 GY-1
TR-C2 3 113-CR23 OR-1 2504673 923-EF33 GY-1
C 1
2474362
170-TR1 RD-1
A607-TR24 PK-1
200-TR12 BK-1
1
2
FRONT LH FLOOD STD
250-2645
4 200-CR33 BK-1
332-CR22 BU-1
923-EF36 GY-1 C
CONN 5 2 607-TR2 PK-1.5 115-TR7 RD-1 115-TR23 RD-1 1
2

X752-EF31 GY-1
3 118-TR3 GY-1 115-TR22 RD-1 25A 10A 15A 10A 5A 10A 10A 10A 15A 15A 532-CR56 GN-1 X752-EF32 GY-1
TO PLATFORM HARN 4 A607-TR4 PK-1.5 (10) COOLANT TEMP GAUGE X752-EF37 GY-1
CONN PW-C16 TR-C8 287-2801
5 502-TR5 OR-1 118-TR3 GY-1 2497415 STARTER CABIN FRONT REV KEY SIGNAL RADIO/ DOME HORN/ HEAD 110-CR62 RD-1 X752-EF29 GY-1
(LOC F-12) 6 500-TR6 BR-1 170-TR1 RD-1 SOL FAN LAMP LAMP START LAMP ACCESS LAMP MISC LAMP 116-CR19 BR-1.5 CR-C17 TO MATING CONNECTOR

7 115-TR7 RD-1 A607-TR25 PK-1 1 FRONT RH FLOOD STD STD FRONT 3-IGN
117-CR18 YL-1.5 2497477
TO MATING CONNECTOR
8 501-TR8 GN-1 200-TR10 BK-1 2 250-2645 2-SEND 158-CR2 BR-1.5 A110-CR71 WH-1 1 CONN 7
200-TR10 BK-1 184-CR10 BU-1 200-CR72 BK-1 2 TO PRODUCT LINK 240 HARN
200-TR11 BK-2.5 CR-C6 200-CR28 BK-1 450-CR68 YL-1 3 CONN PJ-C1 CONN 18
424B

PRODUCT

4-GND
TR-C1 TR-C10 (LOC I-15) PW-C10 EF-C1
200-TR13 BK-1 3103045
2497477 200-CR34 BK-1 4
FUSE THIS SCHEMATIC IS FOR 424B AND 424B2 BACKHOE LOADERS
LINK

2497422 CONN 8 200-CR30 BK-1 2497446 2497421

5A

608-TR26 GN-1.5 200-TR15 BK-1 115-TR22 RD-1 PULLER 614-CR47 PU-1 200-CR35 BK-1 (62) KEY START SWITCH 450-PW121 YL-1 450-EF1 YL-1
CONN 6 1 1 CONNECT TO 1
142-8858
1
WITH SIDE-SHIFT AND MECHANICAL ENGINES
2 607-TR2PK-1.5 200-TR12 BK-1 200-TR13 BK-1 2 ACCESSORY PORT 2 441-CR13 OR-1 200-CR32 BK-1 309-PW7 GY-1 2 309-EF2 GY-1
TO RIGHT SIDE CONSOLE HARN 3 630-TR27 GY-1.5 200-TR14 BK-1 3 113-CR25 OR-1 CR-C1 443-PW137 YL-1 3 443-EF3 YL-1 THIS SCHEMATIC IS FOR THE FOLLOWING ENGR MODELS (SALES MODELS):
USE THE DESIGNATED
CONN CR-C9 4 608-TR28 GN-1.5 4 200-CR29 BK-1 307-CR17 OR-1 1552272 R
405-PW1 GY-1 4 405-EF4 GY-1 TT677 (424B)
(LOC B-6) TR-C9 FUSES ONLY TT721 (424B HD)
5 532-TR29 GN-1 201-TR18 BK-1.5 2474363
H 308-CR14 YL-1 1 YL-16 441-PW13 OR-1 5 441-EF5 OR-1 TT933 (424B2)
C OFF
TO MATING CONNECTOR
6 630-TR30 GY-1.5 201-TR19 BK-1.5 201-TR9 BK-2.5 GND 5A 5A 15A 15A 15A 10A 10A 10A 5A 5A 2 PU-16
ON
447-PW8 PK-1 6 447-EF6 PK-1
S COMPONENTS ARE SHOWN INSTALLED ON A FULLY OPERABLE MACHINE WITH
201-TR20 BK-1.5 201-TR16 BK-1 1 MOTOR L 308-CR14 YL-1 307-CR17 OR-1 3 OR-16
ST 406-PW3 PU-1 7 406-EF7 PU-1 THE KEY AND ENGINE OFF AND THE TRANSMISSION SHIFTER IN NEUTRAL.
B
201-TR21 BK-1.5 201-TR17 BK-1 200-TR14 BK-1 6 BK REAR REAR FRONT
REAR
BUCKET 105-CR16 RD-1 4 BR-16 128-PW134 PK-1 8 128-EF8 PK-1
T PARK PARK LAMP LAMP WASH/ TRANS- INDICATOR RELAY POSITION
500-TR6 BR-1 5 BR
RIGHT LEFT AUX. STD. WIPE HYD MISSION MONITOR COILS SOLE
322-PW117 GY-1 9 322-EF9 GY-1
500-TR6 BR-1 501-TR8 GN-1 2 GN
B+ P 367-CR21 BU-1 754-PW56 BU-1 10 754-EF10 BU-1 IDENT PART NO. CHG ATCH NOTE DESCRIPTION
TR-C3 501-TR8 GN-1 502-TR5 OR-1 4 OR 923-PW81 GY-1 11 923-EF11 GY-1 NOTE LOC NOTE DESCRIPTION
2497415
HARNESS AS.
502-TR5 OR-1 118-TR3 GY-1 3 GY (70) SIDESHIFT LOCK SW (69) REAR HORN SW (58) FRONT FLOOD SW (68) STD REAR FLOOD SW (67) ATCH REAR FLOOD SW 532-CR56 GN-1 (4) LIGHT DIODE BLOCK 752-PW133 YL-1 12 752-EF12 YL-1
1 608-TR26 GN-1.5 532-TR29 GN-1 169-0597 169-0587 169-0592 169-0590 169-0590 13
CF 444-0155 00 FRONT CONSOLE
REAR LH FLOOD STD 1 CR-C2 303-4011
250-2645 2 201-TR18 BK-1.5 607-TR2 PK-1.5 (23) FRONT WIPER 460-PW123 YL-1 14 460-EF14 YL-1 CR 524-3240 00 SIDE CONSOLE
3103044 VARIOUS NOTE A: ASSEMBLE TERMINALS TO DESIGNATED STUD
237-2650 7 8 7 8 7 8 7 8 7 8
607-CR55 PK-1.5 607-CR55 PK-1.5 EF 509-5827 00 ENGINE
608-TR26 GN-1.5 607-CR57 PK-1.5 1
HA 448-0553 02
PW-C11 EF-C8 ATCH HAMMER
608-CR40 GN-1.5 2
TR-C5 TR-C11 2497448 CONN 17 2497468 JV 425-0070 02 REAR
608-TR28 GN-1.5 607-CR57 PK-1.5 614-CR999 PU-1 3
H-12 NOTE C: CONNECTOR PW-C5 (LOC. SHT 1, G-11) IS USED TO SUPPLY POWER
2497415 2497415 CONN 9 2 2 2 2 2
630-CR43 GY-1.5 4 304-PW119 WH-4 1 304-EF15 WH-4 PJ 524-3242 00 ATCH PRODUCT LINK JUMPER
CONNECT TO 3 3 3 FOR THE CAT DATA LINK SERVICE PORT (CONN UH-C2) ATTACHMENT.
REAR RH FLOOD STD 1 1 608-TR28 GN-1.5 630-TR27 GY-1.5 115-TR23 RD-1 1 608-CR41 GN-1.5 608-CR39 GN-1.5 2
LAMP RELAY (K6)

FM RADIO MOM PL 524-3239 00 FUSE BOX

MAIN RELAY (K5)

3 3
250-2645 2 201-TR19 BK-1.5 200-TR15 BK-1 2 608-CR38 GN-1.5
PW 398-5566 06 PLATFORM
25A

10A

15A

10A

10A

10A

10A

15A

15A
5A

630-TR30 GY-1.5 608-CR40 GN-1.5

RR AUX

RL 290-3713 05 ROADING LIGHTS F-1, G-1 NOTE E: CONNECTOR EF-C17 (LOC SH 1 I-F) TO BE CONNECTED TO
B A607-TR4 PK-1.5 A607-TR24 PK-1
TR-C12
2497415 CONN 10
CR-C10 CR-C11 CR-C12 CR-C13 CR-C14
614-CR50 PU-1
614-CR51 PU-1
CR-C9
2502628
TR 290-3708 05 HEADLINER
REVERESE SOLENOID FOR THE MACHINES WITH
C+ TRANSMISSION.
B
CONNECT TO CABLE AS.
A607-TR25 PK-1 201-TR17 BK-1 1 CABIN FAN 1429117 1429117 1429117 1429117 1429117 614-CR53 PU-1 614-CR12 PU-1
532-TR29 GN-1 614-CR54 PU-1 614-CR48 PU-1 608-CR38 GN-1.5 GG 237-7915 02 BATTERY NEGATIVE GROUND CONNECTOR EF-C3 (LOC SH 1 I-F) TO BE CONNECTED TO
2 3044656 1
REVERESE SOLENOID FOR THE MACHINES WITH
TR-C6 614-CR52 PU-1 614-CR999 PU-1 607-CR55 PK-1.5 2 CONN 6 PP 237-7914 02 BATTERY POSITIVE

630-CR45 GY-1.5
C-90 TRANSMISSION.
608-CR41 GN-1.5
116-CR19 BR-1.5
607-CR57 PK-1.5
H771-CR11 BR-1

117-CR18 YL-1.5
2497415 614-CR49 PU-1 630-CR42 GY-1.5 3 TO HEADLINER HARN
614-CR53 PU-1

614-CR51 PU-1
158-CR2 BR-1.5

200-CR28 BK-1
614-CR54 PU-1

614-CR52 PU-1
184-CR10 BU-1

367-CR21 BU-1
200-CR34 BK-1

200-CR30 BK-1

200-CR35 BK-1

614-CR50 PU-1
110-CR62 RD-1

200-CR32 BK-1
REAR RH FLOOD STD 2 1 630-TR30 GY-1.5 5A 614-CR47 PU-1 608-CR39 GN-1.5 4 CONN TR-C1
250-2645 2 201-TR21 BK-1.5 170-TR1 RD-1 DOME LAMP 1 532-CR56 GN-1 5 (LOC C-16) CBL-PP1 RD-00 CALLOUT FORMAT IF APPLICABLE
201-TR16 BK-1 287-2772 630-CR45 GY-1.5 630-CR42 GY-1.5 630-CR44 GY-1.5 6
FR LAMP RELAY (K13)

TO MATING CONNECTOR
630-CR44 GY-1.5 Callout Number Component
(52) VALVE GP - CONTROL
START RELAY (K1)

630-CR43 GY-1.5 (Machine Location from Name

Component Locations Table)
A110-CR71 WH-1
138-1234 Part Number
15A

15A

15A

10A

10A

10A
5A

5A

5A

5A

TR-C4 CR-C15
2497415 3103044
H771-CR11 BR-1 H771-CR11 BR-1 103-PW115 RD-6 SYMBOL DESCRIPTION
REAR LH FLOOD STD 2 1 630-TR27 GY-1.5 201-TR9 BK-2.5 H771-CR58 BR-1 H771-CR58 BR-1 1 (7) DIODE 101-PW116 RD-6 (15) FRAME GND ABBREV COLOR
250-2645 2 201-TR20 BK-1.5 200-TR11 BK-2.5 200-CR59 BK-1 2 319-9610 CBL-GG1 BK-00
200-CR34 BK-1 3
4
POS NEG
WIRE GROUP COLOR DESCRIPTIONS CIRCUIT CONNECTED RD RED

WH WHITE
(18) TOP CAB GND NOTE A GROUND CIRCUIT CIRCUIT NOT CONNECTED
(2) BATTERY OR ORANGE
WIRES THAT HAVE SYSTEM VOLTAGE WHEN THE KEY SWITCH IS OFF ELECTRICAL CONNECTION TO
3356233
RR STD. RELAY (K29) FRONT WIPER RELAY (K26) WIRES THAT HAVE SYSTEM VOLTAGE WHEN THE KEY SWITCH IS ON MACHINE STRUCTURE
YL YELLOW
NOTE A INTERNAL ELECTRICAL CONNECTION
STARTING CIRCUIT
TO SURFACE OF COMPONENT PK PINK
TRANSMISSION / ENGINE PUMP CONTROL CIRCUIT
HEADLINER RIGHT SIDE CONSOLE BATTERY BOX MONITOR CIRCUIT CONNECTOR BK BLACK

TURN SIGNAL / WIPER WASHER CIRCUIT GY GRAY

LAYOUT OF FUSE / RELAY BLOCKS H# CIRCUIT GROUPING DESIGNATION

OTHER COLOR DESCRIPTIONS ATCH WIRE, CABLE, COMPONENT

PU PURPLE

BR BROWN
HIGHWAYS
SPLICE
GN GREEN
BLADE, SPADE, RING OR SCREW
A TERMINAL BU BLUE
A
THIS SCHEMATIC IS FOR THE 424B, 424B HD AND 424B2 BACKHOE LOADER
ELECTRICAL SYSTEM
Do not operate or work on this product unless you have MEDIA NUMBER: UENR5425-02
read and understood the instruction and warnings in the
relevant Operation and Maintenance Manuals and
SCHEMATIC PART NUMBER: 420-1128, CHANGE: 01, VERSION: D
relevant service literature. Failure to follow the instruc- Components are shown installed on a fully operable machine with the key and engine off, transmission shifter
tions or heed the warnings could result in injury or in neutral and with parking brake set.
death. Proper care is your responsibility. Refer to the appropriate Service Manual for Troubleshooting, Specifications and Systems Operations.
Refer to the Parts Manual using a specific serial number prefix in SIS before ordering parts from this schematic.
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
BATTERY AND TRANSMISSION CIRCUIT
VIEW ALL CALLOUTS

41

47

15

48 46 2
CAB - RIGHT SIDE VIEW
VIEW ALL CALLOUTS

3
6

CONN 12
ENGINE
VIEW ALL CALLOUTS

42
55

19

43
51 52

CONN 18

CONN 17

CONN 23

45
14
44
CONN 24
24 1
66
FRONT CONSOLE
VIEW ALL CALLOUTS
61
22 50

64

56
5

60

13
59

73
CONN 16
CONN 22

CONN 20
54
CONN 19

53

CONN 21
HEADLINER HARNESS
VIEW ALL CALLOUTS

CONN 8

CONN 9

18

CONN 10

CONN 11

CONN 6
MACHINE COMPONENT AND CONNECTOR LOCATIONS
VIEW ALL CALLOUTS

23

72

57

20 49

16 VIEW OF AREA “A”

(ROTATED FOR CLARITY)
74
SIDE CONSOLE
VIEW ALL CALLOUTS
58 68 67
70 69 34 36 21
7 27
12 4
25
39

63 11
29

71 62

CONN 15
33
10
40
65
30

38
8
CONN 3
FRONT VIEW
CONN 14
CONN 1
CONN 5 35 37 32 26 31 28
CONN 2

REAR VIEW
CONN 4
CONN 7
17
CONN 13