325B EXCAVATOR HE,MM VERSION ELECTRICAL SCHEMATIC, USED IN SERVICE MANUAL SENR1620

SENR9322-01
September 1999
325B Excavators
Electrical System
7EN1 - UP
8GM1 - UP
8PR1 - UP
8RR1 - UP
ABD1 - UP
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Actuator - Engine Gov A-9 1 Sensor - A/C Photo E-3 C
Air Inlet Heater C-8 2 Sensor - Air Inlet Heater Coolant Temp C-9 2
Alarm - Travel G-9 3 Sensor - Coolant Temperature C-8 2
Alternator B-8 4 Sensor - Fuel Level A-5 13
Antenna ATCH C-6 22 Sensor - Pump Discharge Press B-8 14
Assembly - Terminal Block F-8 D Socket 12V H-6 A
Batteries - 12VDC I-8,H-8 5 Solenoid - A/C Clutch C-9 15
Breaker - Alternator I-8 D Solenoid - Eng/Pump Control E-7 18
Breaker - Main I-8 D Solenoid - Engine Shutdown B-9 17
Cable - ATCH Antenna G-6 22 Solenoid - Fine Swing E-7 18
Control - ATCH Power Window C-6 C Solenoid - Flow Control D-7 18
Control - Engine/Pump F-2 C Solenoid - Hammer Control E-7 18
Controller - Wiper/Washer E-1 A Solenoid - Hydraulic Lock I-1 A
Converter - Voltage H-6 A Solenoid - Hydraulic Lock Relay I-7 D
Converter ATCH I-3 A Solenoid - Level Finish A-7 16
Diode G-7 D Solenoid - Start Aid H-9 19
Diode G-7 D Solenoid - Swing Brake E-7 18
Diode - Main Relay H-7 D Solenoid - Travel Speed A-7 16
Fuses I-4,5,6 B Solenoid - Trenching A-7 16
Ground - Cab B-6 6 Speaker ATCH C-6 A
Ground - Cab D-1 E Switch - Air Cleaner Flow H-9 20
Ground - Chassis A-3 7 Switch - ATCH Refueling Start A-3 6
Ground - Chassis A-9 8 Switch - ATCH Refueling Stop A-3 6
Ground - Chassis I-8 D Switch - ATCH Hammer H-1 C
Ground - Platform G-2 B Switch - ATCH Power Window C-6 9
Ground - Platform H-1 9 Switch - ATCH Power Window limit B-6 9
Ground - Relay Panel G-7 D Switch - ATCH Refueling A-4 6
Ground Strap - Chassis to Platform I-6 10 Switch - ATCH Seat Heater D-4 A
Heater - ATCH Seat with Seat Heater F-4 A Switch - Aux Hydraulic Pressure H-1 B
Horn A-2 7 Switch - Backup EPR Valve E-5 C
Lamp - Cab G-1 9 Switch - Backup Governor D-5 C
Lamp - Chassis A-2 6 Switch - Boom Raise Pressure D-8 18
Lamp - Window Limit D-1 9 Switch - Coolant Level H-9 19
Lamp (Dome) C-6 A Switch - Disconnect I-8 D
Lighter E-1 E Switch - Engine Oil Level A-8 1
Meter - Service F-1 E Switch - Engine Oil Press B-9 15
Monitor F-1 E Switch - Fine Swing Control D-4 C
Motor - Lower Washer I-9 D Switch - Horn I-1 B
Motor - Lower Wiper H-1 9 Switch - Hydraulic Control D-4 C
Motor - Starter A-9 8 Switch - Hydraulic Oil Filter A-5 12
Pickup - Engine Speed B-9 11 Switch - Hydraulic Oil Level A-5 12
Radio - 12VDC I-3 A Switch - Implement Pressure D-8 18
Relay - ATCH Flow Control E-8 D Switch - Key F-3 C
Relay - ATCH Main G-7 D Switch - Lower Washer D-3 C
Relay - Boom Lamp I-7 D Switch - Lower Wiper D-3 C
Relay - Cab/Chassis Lamp I-7 D Switch - Neutral Start Limit I-1 B
Relay - Fan I-8 D Switch - One Touch Low Idle F-2 C
Relay - Heater F-7 D Switch - Power Window Limit D-3 9
Relay - Horn I-7 D Switch - Start Aid D-5 C
Relay - Hydraulic Lock Solenoid I-7 D Switch - Start Aid Coolant Temp D-5 C
Relay - Main G-7 D Switch - Suction Line Shutoff Limit A-6 12
Relay - Neutral Start F-7 D Switch - Throttle Position E-3 C
Relay - Start F-8 D Switch - Travel Pressure D-8 18
Relay - Timer E-7 D Switch - Window Limit D-8 18
Resistor - Backup I-8 D Switch Panel F-2 C
Resistor - Timer Relay E-7 D Unit - A/C, Heater H-6 21
Sender - Hydraulic Oil Temp A-5 12 Unit - Heater Control I-7 D
Machine locations are repeated for components located close together.
A - Located in the cab.
B - Located in the lefthand console.
C - Located in the righthand console.
D - Located on or near relay panel.
Component Location
Connector Location
Connector Number
Schematic
Location
Machine
Location
CONN 1 A-9 1
CONN 2 H-8 D
CONN 3 G-8 26
CONN 4 G-8 7
CONN 5 F-8 D
CONN 6 A-6 D
CONN 7 F-5 A
CONN 8 F-5 A
CONN 9 F-5 27
CONN 10 F-5 28
CONN 11 F-4 27
CONN 12 F-4 29
CONN 13 A-4 30
CONN 14 A-4 31
CONN 15 A-4 31
CONN 16 B-3 6
CONN 17 B-3 7
CONN 18 C-2 10
CONN 19 C-2 32
CONN 20 C-2 1
CONN 21 C-2 1
CONN 22 B-2 7
CONN 23 H-6 33
CONN 24 H-5 F
CONN 25 H-5 F
CONN 26 H-5 F
CONN 27 H-4 F
CONN 28 H-4 F
CONN 29 H-4 F
CONN 30 C-6 22
CONN 31 C-6 22
CONN 32 C-5 22
CONN 33 C-5 22
CONN 34 G-9 D
CONN 35 F-9 D
CONN 36 F-9 D
CONN 37 G-9 D
CONN 38 G-9 D
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.
Related Electrical Service Manuals
Title Form Number
Alternator: (9W-3043) SENR4252
Engine/Pump Control SENR9291
Starting and Charging SENR9292
Starting Motor: (107-7040)
SENR3581
SENR3859
Consist: 6V-5720
Consist: 106-8557
Resistor, Sender and Solenoid Specifications
Part No. Component Description Resistance (Ohms)¹
7Y-8424 Resistor: Timer 47 ± 4.7
125-4812 Sender: Coolant Temperature 2.53
105-9911 Sender: Fuel Level 83.5 ± 1.5
3E-1906 Solenoid: A/C Clutch 17.6 ± 0.6
8C-3663 Solenoid: Engine Shutdown
Latch: 1.55 ± .15
Unlatch: 10.3 ± 1.03
107-7056 Solenoid: Fine Swing 34 ± .5
3E-1906 Solenoid: Start Aid 6
¹ At room temperature.
Code
Description Of Problems
1301 Engine oil pressure too low
3102 Engine coolant temperature is too high
1303 Hydraulic oil temperature is too high
1304 Air filter is clogged
1305 Battery voltage is not normal
2201 Governor actuator feedback sensor circuit is open or shorted battery voltage
2202 Governor actuator feedback sensor is shorted to body ground
2301 Governor actuator feedback signal is not stable
2302 Governor actuator feedback signal deviates
2303 Governor actuator does not move
2304 Calibration data error
3201 Monitor RAM is not normal
4101 Electric power supply to the controller is too much(43 volts)
4102 Over-current in proportional reducing valve
4103 Proportional reducing valve circuit is open
4105 Over-current in digital output (trenching solenoid)
4106 Over-current in digital output (fine control solenoid)
4107 Over-current in digital output (Travel speed change solenoid)
4108 Over-current in digital output (travel alarm)
410A Over-current in digital output (swing brake solenoid)
4201 Engine speed is not normal
4202 Engine coolant temperature sensor is shorted to body ground
4203 Hydraulic oil temperature sensor is shorted to body ground
4204 PWM sensor of pump delivery pressure is open in circuit
4207 PWM sensor of pump delivery pressure is open in circuit
420A Fuel sensor is shorted to ground
420B Fuel sensor is open or shorted to battery voltage
420C Electric power supply is too low (below 23 volts)
420D Electric power supply is too high (above 32 volts)
420E Engine speed dial is not one of the specified 10
4301 Data mismatch 1 between alternator and speed sensor (alternator is abnormal)
4302 Data mismatch 2 between alternator and speed sensor (speed sensor is abnormal)
4303 Engine stalls
A201 Monitor communication is not normal
A202 Monitor takes to much time to respond to controller's signal
A203 Communication is abnormal in controller
Real Time Error Codes
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
3E-6455 Engine Oil Pressure
90 ± 21 kPa
13 ± 3.0 psi
70 ± 21 kPa
10 ± 3.0 psi
A-B , Normally Open
A-C, Normally Closed
7N-0718 Disconnect
2.03 ± 0.34 N.m
- Normally Closed
106-0180 Boom Raise Pressure
2646 ± 196 kPa
383.8 ± 28.4 psi
2156 ± 196 kPa
312 ± 28.4 psi
Normally Open
106-0179
Travel Pressure
Implement Pressure
1520 ± 98 kPa
220.5 ± 14 psi
1127 kPa Min
163.5 psi
Normally Open
109-9330 Air Cleaner
635 ± 58 kPa
92 ± 8.4 psi
- Normally Open
3E-5181 Suction Line Shutoff Limit
24.5 ± 8.9 kPa
3.55 ± 1.3 psi
-
1-2, Normally Open
3-4, Normally Closed
106-0181
Flow Control Pressure
Aux. Hydraulic Pressure
Hammer Pressure
490 ± 49 kPa
71 ± 7.1 psi
290 kPa
42 psi
Normally Open
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Distribution Circuits Lighting Circuits
101 RD Bat (+) (Not Application Specific) 530 OR Washer Right
103 RD Aux Ckt 575 YL Wiper - Aux (Park)
105 RD Key Start Sw 576 PK Turn Signal SW To Flasher
107 RD Eng Shut - Down Fire Suppr 586 BR Aux Hyd - Close
109 RD Alt Output (+) Term. 590 GY Wiper SW To Intermittent Module
111 RD Aux Ckt 592 BU DC/DC Converter Power Output
112 PU Main Power Rly Output A513 RD DC/DC Converter Memory Output
113 OR Opr Mon Panel VMIS B+ Switched A537 PK Seat Heater (Resistive Element In Cushion)
114 RD Warning Horn (Forward) A579 OR Wiper Motor +
118 GY Aux Ckt A580 BR Wiper Motor -
120 YL Aux Ckt A581 GN Wiper Motor Raise
124 GN A/C A582 PU Wiper Motor Stop
129 BU Aux Ckt A583 YL Power Window Interlock To Wiper Cont
135 BU Aux Ckt A584 BU Front Window Limit SW To Wiper Cont
140 BU Aux Ckt A586 OR Wiper SW To Wiper Cont
147 PU Aux Ckt A587 YL Power Window Cont To Safety Sol Relay
149 PU Aux Ckt A588 GN Safety Sol Relay To Sol
150 RD Bat (+) A589 OR Power Window Up
151 GN Aux Ckt A590 BU Power Window Down
152 BU Aux Ckt A591 PU Rear Window Limit SW
154 RD Aux Ckt C468 BU Engine Oil Level
168 RD Aux Ckt C537 GN Turn Signal SW To Flasher
172 GN Aux Ckt C538 OR Hazard Indicator
172 RD Aux Ckt 607 PK Flood Lamp - Front
175 RD Aux Ckt 615 YL Cab Flood Lamp/Rops
176 YL Aux Ckt 616 BU Bucket Flood Lamp/Boom Flood Lamp
177 RD Main Brkr Control Circuits
180 GN Aux Ckt 763 BU Torque Converter SW
185 YL Aux Ckt 786 GN Eng Speed Cont - Hi Press SW
189 RD Aux Ckt 788 YL Eng Speed (+)
191 WH Aux Ckt 791 PK Eng Speed Cont - Lo Sol
196 BU Aux Ckt A718 PU Start Aid Coolant Sensor Signal
Ground Circuits A755 PK Throttle SW #1
200 BK Main Chassis A756 BU Throttle SW #2
201 BK Operator Monitor Return A757 GY Throttle SW #3
235 BK Electronic Pump Ctrl Gnd A758 BR Throttle SW #4
Basic Machine Circuits A761 PU Electronic Pump Cont Throttle Ground
301 BU Starter No. 1 Sol A762 PU Electronic Pump Cont Eng Speed Ground
304 WH Starter Relay No. 1 Output A768 BU Pump Control Valve #1 (+)
306 GN Starter Relay Coil To Neut Start SW Or A769 GY Pump Control Valve #2 (-)
307 OR Key Start SW To Neutral Start SW Or A770 PK Electronic Pump Control Bypass SW To Resistor
308 YL Main Power Relay Coil A771 PU Float SW
309 GY Alternator Regulator Term. 877 YL Glow Plug Magnetic SW To Glow Plug
310 PU Start Aid SW To Start Aid Sol 950 BR Right Console Compactor SW To Relay/Diode
311 WH Start Aid Sol To Temp SW 951 PK Right Cont Handle SW To Relay/Diode
320 OR Horn Relay Coil To SW 954 GN Right Console Eng Throttle SW To Relay/Diode
321 BR Backup Alarm Lamp Travel Alarm F771 OR Backup SW
322 GY Warning Horn (Forward) F772 WH Backup SW
323 WH Fuel Pump Power F773 OR Governor Accel
325 PK Fuel Pump Relay Cut-Out F774 WH Governor Decel
326 PU Key Start SW "C" Term. K904 GN Pump Discharge - Signal
329 YL Fuel Pump To SW K905 RD Pump Discharge - +B
365 YL Fuel Pump Relay To Switch K906 GN SW To SW (Generic)
386 PK Air Shutoff Solenoid Enable K907 BU XMSN Cont Fwd SW To Gnd
Monitoring Circuits K909 BU XMSN Cont Rev SW To Gnd
403 GN Alternator (R) Term. K911 PK XMSN Cont Speed 2 SW To Gnd
405 GY Opr Mon Oil Press. (Low Setting) K912 GN XMSN Cont Speed 3 SW To Gnd
412 BU Opr Mon Cool Flow/Ds2 App Spec)(Pin 26)HEUI-ADEMI K915 GN XMSN Cont Speed 4 SW To Gnd
430 BU Opr Mon Air Filter K997 BU XMSN Cont Neut SW To Gnd
487 OR Hyd Oil Flow SW L908 OR XMSN Cont Pk Brk Lever SW To Gnd
491 PK VMIS Hyd Oil Temp Sensor L909 BU Impl Cont SW To Gnd N.O.
492 GY VMIS Coolant Temp Sensor Signal L968 OR Impl Cont SW To Gnd N.C.
495 GN VMIS Fuel Level Signal L969 WH XMSN Cont Speed 1 SW To Gnd
496 WH Opr Mon Panel Hyd Oil Level L970 GY Injector Diode To Injector 14
A495 GY Alternator (R) Terminal #2 L971 GN Impl Cont Lift Proportional Sol
Accessory Circuits L972 BU Impl Cont Lower Proportional Sol
501 GN Wiper - Front (Low) L973 GN Impl Cont Sol Return
506 PU Washer - Front L974 GN Impl Cont Pilot Press Sol
508 PU Radio Speaker - Left L975 OK Serial Data (Transmit)
509 WH Radio Speaker - Left (Common) L976 GN Serial Data (Receive)
511 BR Radio Speaker - Right L977 YL XMSN Shift Sol No. 5 or 4
512 GN Radio Speaker - Right (Common) L978 GY XMSN Shift Sol No. 6
519 PK Thermostat To Refrigerant Press. SW
A AA
1
2
325-PK-14
200-BK-14
T
This indicates that the component does not have a wire connected to ground. It is
grounded by being fastened to the machine.
This indicates that the component has a wire connected to it that is connected to ground.
105-9344
T
Normally open switch that will close with an increase of a specific condition (temp-press-etc.).
The circle indicates that the component has screw terminals and a wire can be disconnected from it.
Pin
Socket
Fuse
Component
Part Number
Pin or Socket
Number
Receptacle
Plug
Wire Gauge
Wire, Cable, or Harness
Assembly Identification
Wire Color
Normally closed switch that will open with an increase of a specific condition.
No circle indicates that the wire cannot be disconnected from the component.
Single Wire
Connector
Circuit Number
Identification
Ground
Connection
Pressure
Symbol
Temperature
Symbol
Level
Symbol
Flow
Symbol
Circuit Breaker
Symbol
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.
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 Symbols
Electrical Schematic Symbols And Definitions
1
1
2
2
Typical representation of a Sure-Seal
connector. The plug and receptacle
contain both pins and sockets.
Typical representation of a Deutsch
connector. The plug contains all
sockets and the receptacle contains
all pins.
©
1999 Caterpillar
All Rights Reserved
Printed in U.S.A.
1GS1 - UP
1HS1 - UP
5LW1 - UP
A
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
25
26
27
28
29
30
32
33
7
F
A
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
25
26
27
28
29
30
31
32
33
7
F
Machine Harness Connector And Component Locations
E95578
200-BK-18
586-BR-18
147-PU-18
F774-WH-18
F773-OR-18
A761-PU-18
K904-GN-18
430-BU-18
K906-GN-18
A771-PU-18
763-BU-18
A769-GY-18
491-PK-18
496-WH-18
495-GN-18
403-GN-18
788-YL-18
A762-PU-18
C468-BU-18
405-GY-18
492-GY-18
519-PK-18
321-BR-18
412-BU-18
487-OR-18
310-PU-18
107-RD
103-RD-18
168-RD-14
140-BU
200-BK
112-PU-6
196-BU
K909-BU-18
A587-YL-18
A588-GN-18
151-GN-18
308-YL-18
307-OR-18
791-PK-18
615-YL
786-GN-18
149-PU
320-OR-18
114-RD-18
A770-PK-18
200-BK
140-BU
149-PU
107-RD
103-RD-18
114-RD-18
191-WH-14
115-PK-14
120-YL
118-GY
124-GN-14
129-BU-18
954-GN-18
954-GN-18
954-GN-18
200-BK-18
235-BK-14
200-BK-14
103-RD-18
A587-YL-18
506-PU-18
403-GN-18
A771-PU-18
788-YL-18
A762-PU-18
763-BU-18
412-BU-18
C468-BU-18
321-BR-18
405-GY-18
492-GY-18
491-PK-18
495-GN-18
430-BU-18
496-WH-18
K904-GN-18
A761-PU-18
487-OR-18
235-BK-14
200-BK-14
200-BK-18
586-BR-18
786-GN-18
791-PK-18
308-YL-18
307-OR-18
578-BU-18
K906-GN-18
A768-BU-18
A769-GY-18
A770-PK-18
F774-WH-18
F773-OR-18
K909-BU-18
310-PU-18
A588-GN-18
A588-GN-18
575-YL-18
152-BU-18
576-PK-18
107-RD
196-BU
320-OR-18
151-GN-18
129-BU-18
118-GY
191-WH-14
103-RD-18
512-GN-18
511-BR-18
509-WH-18
508-PU-18
103-RD-18
519-PK-18
113-OR-18
185-YL-18
512-GN-18
511-BR-18
508-PU-18
509-WH-18
519-PK-18
124-GN-14
103-RD-18
103-RD-18
120-YL
113-OR-18
185-YL-18
129-BU-18
118-GY
124-GN-14
200-BK-14
519-PK-18
615-YL-18
200-BK-18
103-RD-18
615-YL-18
103-RD-18
191-WH-14
191-WH-14
403-GN-18
403-GN-18
403-GN-18
403-GN-18
200-BK-18
200-BK-18
200-BK-18
590-GY-18
501-GN-18
A586-OR-18
786-GN-18
791-PK-18
113-OR-18
308-YL-18
307-OR-18
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
576-PK-18
575-YL-18
578-BU-18
A590-BU-18
A589-OR-18
K915-GN-18
586-BR-18
310-PU-18
A769-GY-18
A768-BU-18
K906-GN-18
185-YL-18
K909-BU-18
K907-BU-18
A770-PK-18
F772-WH-18
F774-WH-18
F773-OR-18
F771-OR-18
200-BK-18
200-BK-18
615-YL-18
235-BK-14
615-YL
615-YL
235-BK-18
235-BK-18
308-YL-18
A758-BR-18
A757-GY-18
A756-BU-18
A755-PK-18
K912-GN-18
K911-PK-18
K915-GN-18
F771-OR-18
F772-WH-18
K907-BU-18
403-GN-18
487-OR-18
A761-PU-18
K904-GN-18
496-WH-18
430-BU-18
495-GN-18
491-PK-18
492-GY-18
405-GY-18
321-BR-18
C468-BU-18
412-BU-18
763-BU-18
A762-PU-18
788-YL-18
A771-PU-18
A586-OR-18
501-GN-18
590-GY-18
A589-OR-18
A590-BU-18
200-BK-18
200-BK-18
147-PU-18
147-PU-18
140-BU
149-PU
168-RD-14
114-RD-18
151-GN-18
320-OR-18
196-BU
107-RD
112-PU-6
114-RD-18
168-RD-14
112-PU-14
112-PU-14
112-PU-14
124-GN-14
120-YL
200-BK-18
103-RD-18
140-BU
149-PU
168-RD-14
114-RD-18
151-GN-18
320-OR-18
196-BU
107-RD
112-PU-14
112-PU-14
112-PU-14
112-PU-14
112-PU-14
112-PU-14
191-WH-14
Y/W
Y/G
B
172-GN-18
185-YL18
196-BU
200-BK-18
320-OR-18
151-GN-18
200-BK-18
320-OR-18
200-BK-18
306-GN-18
A718-PU-18
386-PK-18
309-GY-18
616-BU
322-GY-18
607-PK-18
306-GN-18
304-WH-8
877-YL-4
101-RD-4
200-BK-18
200-BK-18
306-GN-18
200-BK-18
308-YL-18
K909-BU-18
307-OR-18
200-BK-18
200-BK-18
386-PK-18
386-PK-18
306-GN-18
306-GN-18
307-OR-18
200-BK-18
308-YL-18
200-BK-18
112-PU-6
147-PU-18
147-PU-18
147-PU-18
950-BR-18
951-PK-18
111-RD-14
189-RD-14
K909-BU-18
112-PU-14
112-PU-14
112-PU-14
149-PU
140-BU
308-YL-18
200-BK-18
200-BK-18
200-BK
200-BK-14
103-RD-18
147-PU-18
200-BK-18
200-BK-14
200-BK-14
403-GN-18
112-PU-14
151-GN-18
112-PU-14
185-YL-18
112-PU-14
112-PU-14
112-PU-14
200-BK-18
311-WH-18
304-WH-8
308-YL-18
311-WH-18
310-PU-18
951-PK-18
950-BR-18
177-RD-8
177-RD-8
109-RD-6
310-PU-18
877-YL-4101-RD-4
306-GN-18
177-RD-14
306-GN-18
A495-GY-18
111-RD-14
189-RD
154-RD-18
154-RD-18
189-RD
177-RD-14
111-RD-14
A495-GY-18
RELAY PANEL
951-PK-18
2
1
OUT 1
+B
IN 2
IN 1
GND
OUT 2
UU(NOTE J)
AG(NOTE K)
ZZ
YY
JJ
XX
WW(NOTE J)
AJ(NOTE K)
12
1
8
2
10
11
3
4
9
TIMER RELAY
111-4870
7
6
XX
5
NEUTRAL
START RELAY
111-4871
START RELAY
125-1302
JJ KK
PP
PP
ATCH FLOW CONT.
RELAY
111-4871
1
2
1
3
2
4
HEATER
RELAY
116-0114
RESISTOR
7Y-8242
KK
L47
L48
A
B
B
B
B
D (NOTE J)
AF(NOTE K)B
PP
196-BU
140-BU
107-RD
200-BK
K909-BU-18
114-RD-18
196-BU
A587-YL-18
A588-GN-18
151-GN-18
308-YL-18
307-OR-18
791-PK-18
615-YL
103-RD-18
786-GN-18
168-RD-14
149-PU
191-WH-14
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
308-YL-18
A718-PU-18
616-BU
149-PU
786-GN-18
322-GY-18
320-OR-18
196-BU
A587-YL-18
A588-GN-18
151-GN-18
200-BK-18
200-BK-18
200-BK-18
607-PK-18
615-YL
791-PK-18
A770-PK-18
200-BK-18
129-BU-18
C468-BU-18
118-GY
149-PU
124-GN-14
200-BK-18
120-YL
K909-BU-18
307-OR-18
386-PK-18
200-BK-18
K909-BU-18
200-BK-18
200-BK-18
11
12
1
2
3
4
5
6
7
8
9
10
1
2
K909-BU-18
A770-PK-18
791-PK-18
615-YL
607-PK-18
200-BK-18
151-GN-18
A588-GN-18
321-BR-18
A587-YL-18
196-BU
320-OR-18
322-GY-18
786-GN-18
149-PU
616-BU
A718-PU-18
306-GN-18
310-PU-18
200-BK-18
308-YL-18
J
A
3
7
200-BK-18
9
1
11
5
A761-PU-18
BK
WH
8
9
6
5
12
11
J
A
4
10
10
2
9
8
12
7
6
11
1
5
2
1
4
3
2
1
200-BK-18
6
1
2
3
5
4
A
J
F773-OR-18
168-RD-18
168-RD-18
200-BK-4
168-RD-14
200-BK
200-BK
200-BK
147-PU
L908-OR-18
L909-BU-18
235-BK-18
615-YL
607-PK-18
791-PK-18
115-PK-18
115-PK-18
116-BR-14
F774-WH-18
200-BK-18
3
151-GN-18
200-BK-18
A588-GN-18
616-BU
149-PU-18
149-PU-18
149-PU
322-GY-18
320-OR-18
7
196-BU
A770-PK-18
K909-BU-18
K909-BU-18
12
200-BK-18
200-BK-18
308-YL-18
308-YL-18
L908-OR-18
152-BU
L908-OR
SW PANEL
A/C /HEATER
CIGAR LIGHTER
WASHER/WIPER
LOWER WASHER/WIPER
CONVERTER
CAB/CHASSIS LAMP
PWR WINDOW
191-WH-14
120-YL
115-PK-14
129-BU-18
113-OR-18
L908-OR
L908-OR
124-GN-14
L909-BU-18
118-GY
113-OR-18
RADIO
11
ATCH START AID
COOLANT TEMP SW.
3E-6449
2
1
B
ATCH START
AID SOL
3E-6332
T
116-BR-14
116-BR-14
147-PU
147-PU
105-RD-14
105-RD-14
235-BK-18
L909-BU-18
L908-OR-18
147-PU
147-PU
200-BK-18
147-PU
6
1
3
235-BK-18
5
AIH COOLANT
TEMP SENSOR
125-4812
1
B
2
1
GROUND
ON(KEY)
1
2
AIR CLEANER SW
109-9330
2
7
PUMP DISCHARGE
PRESS SENSOR
106-0178
SIGNAL
GROUND
+B
BK-18
BR-18
YL-18
B
C
AIR HEATER
107-9652
8
9
4
T
B
J
GND
F/B
+B
ACCEL
B B
B
BK-00
C
2
1
DECEL
6
A
L909-BU-18
B
B
ENG GOV
ACTUATOR
106-0126
A
A
HH
B
C
B
B
B
C
C
C
C
C
KEY
L908-OR-18
1
2
L909-BU
ALTERNATOR
9W-3043
ATCH AUTO
LUBRICATION PUMP
127-5264
ATCH
TRAVEL ALARM
3E-7738
ENG OIL
LEVEL SW
111-4759
1
2
2
2
1
B
B
COOLANT
LEVEL SW
096-0744
1
2
T
COOLANT TEMP
SENSOR
4I-5394
MOTOR
C
B
BATMTR
S
G
B
STARTER
MOTOR
104-7040
B-
WASHER
7T-8890
ATCH
LOWER WASHER
7T-8890
2
1
ENG
SHUTDOWN SOL
8C-3663
ENG OIL
PRESS SW
3E-6455
CHASSIS
BK-18
RD-18
ENG SPEED
PICKUP
6V-2455
L909-BU
MM
BATTERY
3T-5760
POS
NEGNEG
POS
A
C
B
A
BU-18
B+
RD
ALT
A/C CLUTCH
SOL
3E-1906
ATCH
BATTERY
3T-5760
(NOTE C)
200-BK-18
K904-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
L909-BU
235-BK-18
235-BK
235-BK
235-BK
116-BR-14
116-BR-14
116-BR-14
A769-GY-18
A768-BU-18
763-BU-18
200-BK-18
200-BK-18
200-BK-18
325-PK-18
1
2
B
C
A
147-PU
A768-BU-18
A769-GY-18
A495-GY-18
306-GN-18
306-GN-18
101-RD-4
304-WH-8
311-WH-18
403-GN-18
309-GY-18
116-BR-14
177-RD-14
177-RD-14
492-GY-18
200-BK-18
308-YL-18
308-YL-18
A718-PU-18
877-YL-4
A762-PU-18
788-YL-18
405-GY-18
308-YL-18
309-GY-18
F774-WH-18
F773-OR-18
A761-PU-18
177-RD-14
C468-BU-18
113-OR-18
113-OR-18
320-OR-18
114-RD-18
200-BK-4
200-BK-18
200-BK-6
200-BK-4
A718-PU-18
200-BK-18
492-GY-18
200-BK-18
309-GY-18
403-GN-18
200-BK-6
200-BK-18
200-BK-6
405-GY-18
788-YL-18
A762-PU-18
200-BK
A587-YL-18
304-WH-8
RD-00
RD-00
200-BK-10
200-BK-18
200-BK-18
301-BU-10
200-BK-18
200-BK-10
301-BU-10
405-GY-18
200-BK-18
788-YL-18
A762-PU-18
A770-PK-18
1
2
B
6
101-RD-4
200-BK-18
200-BK-18
AE
308-YL-18
113-OR-18
308-YL-18
POS
NEG NEG
POS
308-YL-18
113-OR-18
950-BR-18
147-PU-18
A587-YL-18
A588-GN-18
151-GN-18
308-YL-18
307-OR-18
791-PK-18
615-YL
308-YL-18
786-GN-18
149-PU
320-OR-18
M MF
615-YL-18
200-BK-18
H
G
I
F
E
D
C
B
A
H
G
I
F
E
D
C
B
A
200-BK
615-YL
Y/G
Y/W
200-BK-14
114-RD-18
9 8 7 6 5 4 3 2
1
9 8 7 6 5 4 3 2
1
A770-PK-18
K909-BU-18
196-BU
200-BK
113-OR-18
506-PU-18
578-BU-18
200-BK-18
200-BK-18
MOTOR
A
A
168-RD-18
SS
RR
PP
TT
MM
6V-5821
(NOTE C)
200-BK-18
K905-RD-14
FLOW CONT
147-PU-18
147-PU-18
147-PU-18
512-GN
511-BR
L975-PK-18
L973-GN-18
L977-YL-18
L978-GY-18
L974-GN-18
L971-GN-18
L977-YL-18
L978-GY-18
L969-WH-18
L968-OR-18
L973-GN-18
L972-BU-18
L973-GN-18
487-OR-18
200-BK-18
L971-GN-18
L977-YL-18
L974-GN-18
L978-GY-18
ENG/PUMP CONT
119-0612
L971-GN-18
L970-GY-18
L977-YL-18
L974-GN-18
L969-WH-18
L972-BU-18
L970-GY-18
L971-GN-18
L978-GY-18
L975-PK-18
763-BU-18
L977-YL-18
L974-GN-18
L978-GY-18
L969-WH-18
L968-OR-18
L972-BU-18
L977-YL-18
495-GN-18
509-WH
306-GN-18
2
200-BK-18
306-GN-18
200-BK-18
615-YL-18
3
200-BK-18
AD
4
1
365-YL-18
K906-GN-18
1
4
3
2306-GN-18
325-PK-18
A718-PU-18
386-PK-18
309-GY-18
616-BU
322-GY-18
607-PK-18
386-PK-18
200-BK-18
A
A
A
A
326-RD
496-WH-18
A768-BU-18
200-BK-18
BK
YL
172-RD-18
B
BA
A
329-YL-18
GG (NOTE C)
RD-00
RD-00
177-RD-14
ATCH
SUCTION LINE
SHUTOFF LIMIT SW
3E-5181
B
HYD OIL
FILTER SW
116-3660
GROUND
SIGNAL
+B
C
B
A
177-RD-14
BB
B
BBBB
2
1
177-RD-14
177-RD-14
177-RD-14
B
177-RD-14
177-RD-14
177-RD-14
506-PU-18
578-BU-18
177-RD-14
177-RD-14
ATCH
FLOW CONT.
SOL
121-6303
ATCH
FLOW CONT.
SOL
122-4459
177-RD-8
1
2
ATCH
HAMMER CONT
SOL
116-3413
ATCH
FINE SWING
SOL
107-7056
BOOM RAISE
PRESS SW
106-0180
1
2
B
2
12
1
ENG/PUMP CONT
SOL
111-9916
LEVEL FINISH
SOL
121-1490
AE
2
1
TRENCHING SOL
121-1490
TRAVEL SPEED
SOL
121-1491
N
2
1
B
1
2
HYD OIL
TEMP SENDER
4I-5394
2
1
FUEL LEVEL
SENSOR
105-9911
4
1 2
3
ATCH
REFUELING SW
5C-6108
2
1
B
2
1
HYD OIL
LEVEL SW
111-4760
SWING
BRAKE SOL
121-1491
IMPLEMENT
PRESS SW
106-0179
2
TRAVEL
PRESS SW
106-0179
T
1
B
Z
G
L975-PK-18
L975-PK-18
L975-PK-18
L975-PK-18
306-GN-18
306-GN-18
177-RD-14
177-RD-14
177-RD-14
177-RD-14
177-RD-14
177-RD-14
177-RD-14
310-PU-18
310-PU-18
177-RD-6
177-RD-14
115-PK-14
177-RD-14
177-RD-14
112-PU-6
200-BK-18
200-BK-18
200-BK-18
177-RD-6
109-RD-6
101-RD-6
101-RD-6
101-RD-6
112-PU-18
308-YL-18
R/L
C537-GN-18
329-YL-18
168-RD-14
172-RD-18
196-BU
111-RD-14
168-RD-14
168-RD-10
308-YL-18
147-PU
A
A
147-PU-18
112-PU-14
112-PU-14
112-PU-14
12
4
10
2
6
112-PU-14
616-BU
200-BK-14
200-BK-14
306-GN-18
K912-GN-18
K911-PK-18
177-RD-14
403-GN-18
185-YL-18
615-YL-18K911-PK-18
K912-GN-18
149-PU
120-YL
116-BR-14
A586-OR-18
200-BK-18
200-BK
135-BU
ATCH
REFUELING
POWER RELAY
3T-0376
120-YL
590-GY-18
501-GN-18
A755-PK-18
A756-BU-18
A757-GY-18
A758-BR-18
L972-BU-18
200-BK-14
103-RD-18
189-RD
118-GY
129-BU-18
615-YL-18
506-PU-18
403-GN-18
A583-YL-18
A584-BU-18
A584-BU-18
154-RD-18
A583-YL-18
A589-OR-18
A590-BU-18
200-BK-14
AE
191-WH-14
103-RD-18
512-GN-18
511-BR-18
509-WH-18
508-PU-18
615-YL
A587-YL-18
615-YL
506-PU-18
A587-YL-18
111-RD-14
150-RD-18
RELAY PANEL
115-PK-14
112-PU-14
112-PU-14180-GN
189-RD-14
A589-OR-18
A590-BU-18
590-GY-18
501-GN-18
A586-OR-18
191-WH-14
114-RD-18
103-RD-18
114-RD-18
114-RD-18
103-RD-18
114-RD-18
8
150-RD-18
103-RD-18
508-PU-18
509-WH-18
189-RD
200-BK
511-BR-18
512-GN-18
154-RD-18
118-GY
129-BU-18
103-RD-18
103-RD-18
111-RD-14
140-BU
168-RD-10
107-RD
103-RD-18
114-RD-18
150-RD-18
A495-GY-18
115-PK-14
A589-OR-18
A590-BU-18
308-YL-18
F771-OR-18
F772-WH-18
L969-WH-18
L968-OR-18
K915-GN-18
K907-BU-18
115-PK-14
AG
AF
147-PU-18
NOTE F: NOT USE WITH FINE SWING CONT.SW.
NOTE H: USE WITH A/C UNIT
950-BR-18
NOTE K: USE WITH COLD WEATHER FOR JAPAN.
NOTE C: USE WITH COLD WEATHER.
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
FOR A SINGLE SHEET VERSION OF THIS SCHEMATIC
CONTACT DESIGN CONTROL.
NOTE J: NOT USE WITH COLD WEATHER FOR JAPAN.
THIS SCHEMATIC IS FOR THE 325B-HYD EXCAVATOR.
115-PK-14
A495-GY-18
NOTE E: NOT NECESSARY FOR ELECTRIC OPENABLE WINDSHIELD.
150-RD-18
114-RD-18
NOTE D: USE WITH ELECTRIC OPENABLE WINDSHIELD.
NOTE B: USE WITH SHORT BOOM.
154-RD-18
189-RD
111-RD-14
K909-BU-18
NOTE G: USE WITH ADD TANK.
519-PK-18
519-PK-18
519-PK-18
200-BK-14
200-BK-14
175-RD-14
6
1
3
R
BR
A/C UNIT
130-0250
ATCH
HEATER
UNIT
139-7258
4
5
2
175-RD-14
177-RD-14
116-BR-14
1
2
A
10A
15A
10A
10A
10A
10A
A A
ENG GOV
15A
7
8
1
6
5
4
3
2
PLATFORMCHASSIS
GROUND STRAP
7G-1060
150-RD-18
116-BR-14
ATCH
ANTENNA CABLE
111-4846
MM
177-RD-14
H H
10A
HORN
FUSE
10A 9W-1442
15A 9W-1441
20A 9W-1446
30A 8T-9636
BACKUP
A
120-YL
200-BK
15A
DOME LAMP
KEY SW
REFUELING PUMP
BOOM LAMP
FINE SWING
10A
B200-BK-14
10A
30A
10A
10A
10A
10A
10A
10A
20A
10A
10A
10A
15A
175-RD-14
175-RD-14
E/P CONT
HYD LOCK SOL
200-BK-14
10A
LL
C538-OR-18
4
6
3
LL
ATCH
12V SOCKET
121-0987
ATCH 12V 5A
CONVERTER
119-1733
2
5
1
12V MEMORY
24V MEMORY
24V IN
GND
GND
12V OUT
SHUTDOWN
AUX CKT
AUX CKT
LUBRICATOR
8
175-RD-14
6
7
4
2
5
1
3
6
8
1
7
4
5
3
2
HYD LOCK SW
JJJJ
J
J
FUSE BASE
111-4812
S
177-RD-14
177-RD-14
954-GN-18
506-PU-18
C
B
A
177-RD-14
403-GN-18
105-RD-14
152-BU
118-GY
112-PU-6
152-BU
200-BK-14
200-BK-18
200-BK-18
MONITOR +B OUT
L968-OR-18
A761-PU-18
L978-GY-18
A755-PK-18
763-BU-18
A756-BU-18
A771-PU-18
A757-GY-18
508-PU
K997-BU-18
788-YL-18
A762-PU-18
412-BU-18
430-BU-18
321-BR-18
405-GY-18
492-GY-18
491-PK-18
495-GN-18
A758-BR-18
152-BU
496-WH-18
308-YL-18
L975-PK-18
615-YL
200-BK-14
615-YL
ZZ
200-BK-14
12
K997-BU-18
K997-BU-18
200-BK-18
200-BK
200-BK-18
200-BK-18
200-BK-18
506-PU-18
590-GY-18
501-GN-18
129-BU-18
403-GN-18
147-PU
200-BK-18
235-BK-18
K997-BU-18
105-RD-14
K997-BU-18
616-BU
K997-BU-18
954-GN-18
K909-BU-18
191-WH-14
152-BU
235-BK-18
K911-PK-18
K912-GN-18
C468-BU-18
K907-BU-18
F772-WH-18
F771-OR-18
K915-GN-18
K911-PK-18
K912-GN-18
152-BU
786-GN-18
103-RD-18
615-YL-18
A586-OR-18
A583-YL-18
A584-BU-18
A591-PU-18 A583-YL-18
A587-YL-18
A590-BU-18
A589-OR-18
L909-BU-18
L908-OR-18
487-OR-18
A584-BU-18
A584-BU-18
147-PU
K904-GN-18
K905-RD-18
152-BU
235-BK-18
C537-GN-18
200-BK-18
A591-PU-18
512-GN-18
511-BR-18
530-OR-18
509-WH-18
508-PU-18
C538-OR-18
103-RD-18
THROTTLE DIAL S1
THROTTLE DIAL S2
THROTTLE DIAL S3
THROTTLE DIAL S4
GOV ACTR (A)
EPR VALVE (+)
GOV ACTR (B)
GOV ACTR FDBK
COOLANT LEVEL SW
TRAVEL SPEED SOL
ENG SPEED SENSOR (-)
ENG SPEED SENSOR (+)
TRENCHING SOL
IMPLEMENT PRESS SW
ENG OIL LEVEL SW
FUEL LEVEL SENSOR
FRONT PUMP PRESS SENSOR
HYD OIL LEVEL SW
AIR CLEANER SENSOR
HYD OIL TEMP SENSOR
RS485 - (VALVE CONT)
RS485 + (VALVE CONT)
RS232C (GND)
RS232C (RX)
COOLANT SENSOR
9
20
10
28
31
26
13
30
29
35
40
2
6
39
6
24
25
22
15
ALTERNATOR (R TERM)
RS485 - (RH JOYSTICK)
7
38
12
TRAVEL ALARM
ENG OIL PRESS SW
36
SWING BRAKE SOL
23
EPR VALVE (-)
17
21
8
RS485 + (LH JOYSTICK)
7
CAB
8 RS485 - (LH JOYSTICK)
RS485 + (PEDAL)
9
10
RS485 + (SEMI AUTO DIG)
RS485 - (PEDAL)
RS485 + (RADIO CONT)
17
HYD TANK PRESS. SW
RS485 + (MONITOR)
RS485 - (SEMI AUTO DIG)
HYD TANK INDICATOR
RS485 + (RH JOYSTICK)
RS485 - (MONITOR)
27
18 TRAVEL PRESS SW
HYD OIL FILTER INDICATOR
200-BK-18
18 RS485 - (RADIO CONT)
RS485 + (ELEC GOV)
19
+B
+B
AIH INDICATOR
FINE SWING SW
BOOM RAISE PRESS SW
LEVEL FINISH SOL
DUAL PWR SOL
AUX HYD PRESS SW
32
33
25
KEY SW ON
RS485 - (ELEC GOV)
26
12
40
2
4
28
27
ONE TOUCH LOW IDLE SW
21
20
1
11
22
34
3
24
23
14
13
16
15
5
36
35
29
31
30
39
38
37
GND
GND
HAMMER PRESS. SW
RS232C (TX)
KEY SW START
A
DOME LAMP
096-0721
2
3
4
5
6
1
8
7
37
4
3
1
16
19
5
12
32
33
14
11
34
ATCH SPEAKER(L)
7Y-5505
ATCH SPEAKER(R)
7Y-5505
2
1
8
3
5
4
7
6
7
8
9
10
ATCH POWER
WINDOW LIMIT SW
117-6306 (NOTE D)
1
11
ATCH POWER
WINDOW CONT
117-6305
7
6
5
4
177-RD-14
3
8
1
2
5
4
3
2
1
6
F
F
F
F
F
F E E
A A A
6
5
4
3
2
A587-YL-18
L6
L7
ATCH
ANTENNA
106-0036
R. LIMIT
GND
F. LIMIT
+B
WIPER
NEUTRAL
SW. DOWN
SW. UP
PLATFORM
A
1
6
2
5
3
4
2
3
4
5
6
1
8
7
F
BK-00
RD-00
RD-00
A
CHASSIS
BK-00
FF (NOTE C)
BB
EE (NOTE C)
AA
L15
L16
L16
BB
115-PK-14
189-RD
154-RD-18
111-RD-14
150-RD-18
K997-BU-18
BBB
Z
N
B
A
A
A
L46
L45
L16
L15
L50
177-RD-14
177-RD-14
116-BR-14
RELAY PANEL
SIS
CONNECTOR
A
B
D
C
E
FAN RELAY
111-4871
DISCONNECT SW.
7N-0718
7N-0719(NOTE C)
ALT BREAKER
9S-0174
NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGE.
YY
UU(NOTE J)
AG(NOTE K)
VV(NOTE J)
AH(NOTE K)
5
4
6
3
1
7
BACKUP
RESISTOR
102-8016
HYD LOCK SOL RELAY
111-4871
5
3
4
6
2
1
7
8
9
10
11
12
FOR
INSP LAMP
MAIN
RELAY
3T-0376
(NOTE J)
CAB/CHASSIS LAMP RELAY
111-4871
4
5
60A
6
3
12
2
1
7
11
8
9
HORN RELAY
111-4871
BOOM LAMP RELAY
111-4871
10
DIODE
121-1022
DIODE
121-1022
KEY SW.(ON)
L51
L49
L49
L50
L51
L44
L42
L41
L29
L30
L46
L45
L30
L29
L41
L42
4
3
5
323-WH-14
168-RD-18
168-RD-18
168-RD-18
168-RD-18
4
168-RD-18
5
200-BK-14
200-BK-18
168-RD-14
200-BK-14
200-BK-18
L976-GN-18
L976-GN-18
L976-GN-18
365-YL-18
168-RD-18
365-YL-18
140-BU
200-BK
200-BK
200-BK-18
200-BK-18
200-BK-18
321-BR-18
200-BK
140-BU
430-BU-18
HEATER
CONT UNIT
104-3204
412-BU-18
ZZ
CHECK TERM.
RELAY
310-PU-18
311-WH-18
KEY SW.(START)
GND
INDICATOR
430-BU-18
200-BK-18
REGULATOR
TEMP.
VV(NOTE J)
AH(NOTE K)
AD
200-BK-18
412-BU-18
AD
MAIN BREAKER
9S-0174
AF
(NOTE K)
AF
(NOTE K)
ATCH
MAIN
RELAY
159-9108
(NOTE K)
BLOWER
ATCH
MAIN
RELAY
RESISTOR
163-6616
(NOTE K)
WW(NOTE J)
AJ(NOTE K)
12
140-BU
200-BK
326-RD
11
D (NOTE J)
AF(NOTE K)
200-BK-18
L971-GN-18
A771-PU-18
L974-GN-18
K906-GN-18
10
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
L971-GN-18
A771-PU-18
L974-GN-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
951-PK-18951-PK-18
951-PK-18
951-PK-18
951-PK-18
9
60A
GG
(NOTE C)
CC
RR
D (NOTE J)
AF(NOTE K)
PP
D (NOTE J)
AF(NOTE K)
A
A
JJ
HH
GG
FF
EE
CC
BB
AA
CABLE AS.
1
VV
WIRE AS.
2
R
RR
2
1
N
M
K
J
H
G
F
E
D
C
B
GY
PU
BR
RED
WHITE
ORANGE
YELLOW
PINK
ABBREV COLOR
BLACK
GRAY
PURPLE
BROWN
DESCRIPTIONSYMBOL
CONNECTOR
ELECTRICAL CONNECTION
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
BLADE, SPADE, RING,
OR SCREW TERMINAL
BK
PK
YL
OR
WH
RD
GN
BU
GREEN
BLUE
CIRCUIT CONNECTED
CIRCUIT NOT CONNECTED
ATCH WIRE, CABLE,
COMPONENT
L#
CIRCUIT GROUPING
DESIGNATION
IDENT PART NO. LOC
HARNESS AS.
A
310-PU-18
L971-GN-18
A771-PU-18
L974-GN-18
K906-GN-18
495-GN-18
616-BU
322-GY-18
200-BK-18
607-PK-18
168-RD-14
496-WH-18
487-OR-18
491-PK-18
306-GN-18
386-PK-18
L977-YL-18
763-BU-18
L978-GY-18
A768-BU-18
A769-GY-18
K904-GN-18
200-BK-18
K997-BU-18
200-BK-18
200-BK
200-BK-18
200-BK-18
L48
L47
8
2
172-RD-18
A761-PU-18
F773-OR-18
F774-WH-18
326-RD
405-GY-18
788-YL-18
A762-PU-18
C468-BU-18
101-RD-4
304-WH-8
403-GN-18
109-RD-6
309-GY-18
492-GY-18
A718-PU-18
877-YL-4
177-RD-14
311-WH-18
200-BK
200-BK
311-WH-18
321-BR-18
519-PK-18
412-BU-18
430-BU-18
A537-PK-18
2
1
200-BK-18
310-PU-18
586-BR-18
191-WH
576-PK-18
575-YL-18
F773-OR-18
F774-WH-18
A770-PK-18
A769-GY-18
A768-BU-18
K906-GN-18
615-YL-18
L973-GN-18
578-BU-18
307-OR-18
308-YL-18
791-PK-18
786-GN-18
191-WH
185-YL-18
105-RD-14
113-OR-18
A586-OR-18
501-GN-18
590-GY-18
306-GN-18
A718-PU-18
309-GY-18
616-BU
322-GY-18
607-PK-18
304-WH-8
877-YL-4
101-RD-4
109-RD-6
LL
105-RD-14
KK
111-4846 I-3
111-4832 F-8
7Y-8298 A-8
116-0242 H-8
116-0080 H-8
125-4767 A-8
125-4727 I-8
116-0080 I-8
121-1046 A-8
111-4833 F-8
152-BU
L973-GN-18
200-BK-18
147-PU-18
200-BK-18
105-RD-14
K909-BU-18
586-BR-18
530-OR-18
GROUND STRAP
132-1805
200-BK-18
495-GN-18
616-BU
322-GY-18
607-PK-18
168-RD-14
L18
495-GN-18
200-BK-18
616-BU
322-GY-18
607-PK-18
168-RD-14
A
J
200-BK-18
200-BK-18
200-BK-18
8
7
6
5
4
3
2
1
ATCH
SEAT WITH
SEAT HEATER
111-6458
191-WH
1
10
8
11
12
9
10
11
4
3
2
1
9
8
2
7
6
5
4
3
2
1
4
5
6
1
7
3
3
HH
AA
H
2
A
H
4
A
200-BK-18
109-RD-6
877-YL-4
3
L43
L44
RR
B
CHASSIS
200-BK-18
326-RD
A537-PK-18
147-PU-18
C
EE
AA
L969-WH-18
L43
K997-BU-18
B
CHASSIS
L28
200-BK-18
A770-PK-18
L968-OR-18
200-BK-18
200-BK-18
200-BK-18
200-BK-18
Y
200-BK-18
A590-BU-18
A589-OR-18
L29
L41
L42
L42
L41
K905-RD-14
150-RD-18
150-RD-18
150-RD-18
150-RD-18
150-RD-18
154-RD-18
L40
200-BK-18
200-BK-18
530-OR-18
L16
L15
L17
L38
L37
L17
615-YL-18
615-YL-18
200-BK-18
115-PK-14
K905-RD-14
150-RD-18
154-RD-18
172-RD-18
L40
L39
L37
YY
L24
615-YL-18
615-YL-18
L37
L38
575-YL-18
576-PK-18
578-BU-18
L973-GN-18
177-RD-10
152-BU-18
L39
200-BK-18
115-PK-14
200-BK-18
172-RD-18
189-RD
154-RD-18
191-WH-18
150-RD-18
K907-BU-18
111-RD-14
K905-RD-14
L36
200-BK-18
200-BK-18
615-YL-18
615-YL-18
L21
586-BR-18
L20
147-PU-18
L19
615-YL-18
200-BK-18
K909-BU-18
200-BK-18
200-BK-18
XX
200-BK-18
200-BK-18
185-YL-18
K909-BU-18
L22
H
L34
L35
L20
L19
L3
L34
L36
L35
L4
L25
L4
L33
326-RD
326-RD
L21
L32
L31
L10
L9
L8
A
L12
L13
H
L13
L12
L11
L8
L9
L10
HH
L33
L33
K915-GN-18
L20
191-WH-18
L19
L3
L25
L4
L35
L32
L31
L4
L25
L3
L19
L20
L19
L20
L25
L2
RR
K997-BU-18
K997-BU-18
K997-BU-18
615-YL-18
615-YL-18
L27 L26
L35
L27
L26
F771-OR-18
F773-OR-18
F774-WH-18
F772-WH-18
615-YL-18
A769-GY-18
S
T
152-BU-18
615-YL-18
A768-BU-18
F
A
L6
L30
K906-GN-18
615-YL-18
185-YL-18
L29
L28
AB
WW
310-PU-18
615-YL-18
615-YL-18
168-RD-14
200-BK-18
168-RD-14
H
ATCH START
AID SW
111-4784
(NOTE F)
168-RD-18
185-YL-18
L5
NN (NOTE G)
ATCH LOWER
WIPER SW
111-4785
ATCH LOWER
WASHER SW
111-4786
H
L11
ATCH FINE
SWING CONT SW
111-4788
115-PK-14
TT
ATCH POWER
WINDOW SW
111-4789
HHH
ATCH HAMMER
CONT SW
111-4787
H
BACKUP
EPR VALVE SW
114-0421
H H
BACKUP
GOV SW
110-7884 ATCH SEAT
HEATER SW
111-4783
H
200-BK-14
200-BK
200-BK-18
615-YL
615-YL
615-YL
615-YL-18
615-YL-18
A
ATCH
CONVERTER
134-1346
TO RADIO
ATCH RADIO WITH CASSETTE DECK
ATCH RADIO CONVERTER
ANTENNA
113-OR-18
103-RD-18
615-YL-18
508-PU-18
200-BK-18
511-BR-18
509-WH-18
512-GN-18
6
5
4
3
2
1
7
A588-GN-18
200-BK-18
954-GN-18
172-RD-18
109-RD-6
326-RD
172-RD-18
325-PK-18
616-BU
200-BK
200-BK-18
322-GY-18
615-YL
200-BK-18
200-BK-18
200-BK-18
200-BK-18
200-BK
200-BK
A584-BU-18
A584-BU-18
200-BK-18
8
ZZZZ-ZZ-ZZ
YYYY-YY-YY
SPEAKER (+)
10
9
386-PK-18
306-GN-18
491-PK-18
487-OR-18
496-WH-18
200-BK-18
386-PK-18
WH-18
WH-18
WH-18
WH-18
306-GN-18
B
491-PK-18
200-BK-18
200-BK-18
530-OR-18
200-BK-14
616-BU
200-BK-18
322-GY-18
322-GY-18
322-GY-18
200-BK-18
607-PK-18
200-BK-14
322-GY-18
200-BK-18168-RD-14
200-BK
200-BK-18
325-PK-18
200-BK-14
323-WH-14
365-YL-18
615-YL-18
615-YL-18
615-YL-18
200-BK-18
AUX-SPEAKER(+)
3
1
5
2
4
7
6
8
615-YL-18
113-OR-18
103-RD-18
200-BK-18
508-PU-18
509-WH-18
511-BR-18
DIODE
121-1022
A758-BR-18
118-GY
115-PK-14
111-RD-14
W.INT (6)
W
530-OR-18
U
307-OR-18
A757-GY-18
615-YL-18
A756-BU-18
200-BK-18
200-BK
200-BK
575-YL-18
152-BU-18
576-PK-18
A755-PK-18
950-BR-18
200-BK-18
506-PU-18
200-BK-18
A586-OR-18
512-GN-18
501-GN-18
200-BK-18
ATCH RADIO FOR JAPAN
GND
Z
322-GY-18
150-RD-18
176-YL
K912-GN-18
200-BK-18
616-BU
A584-BU-18
201-BK-18
200-BK-18
C
B
A
103-RD-18
308-YL-18
5
4
3
2
1
320-OR-18
154-RD-18
189-RD
172-RD-18
INT (6)
L22
SPEAKER (+)
SPEAKER (-)
L17
L15
L16
K905-RD-14
ACC
ILLUMI
L22
111-RD-14
150-RD-18
200-BK
616-BU
616-BU
BLOCK
121-1023
191-WH
191-WH
191-WH
151-GN-18
308-YL-18
200-BK-18
200-BK-18
200-BK-18
113-OR-18
103-RD-18
200-BK-18
519-PK-18
10
L976-GN-18
200-BK-18
L970-GY-18
200-BK-18
200-BK
A582-PU
200-BK-18
A581-GN
OPERATOR STATION
200-BK-18
607-PK-18
530-OR-18
2
L976-GN-18
4
150-RD-18
154-RD-18
1
3
A583-YL-18
A580-BR
200-BK-14
K911-PK-18
590-GY-18
200-BK-18
403-GN-18
129-BU-18
C538-OR-18
C537-GN-18
200-BK-14
200-BK-18
A584-BU-18
201-BK-18
508-PU
200-BK-18
509-WH
511-BR
A579-OR
512-GN
BACKUP
200-BK-14
AUX-SPEAKER(-)
L976-GN-18
SPEAKER (-)
ATCH
AM RSDIO
116-0218
615-YL
200-BK
L972-BU-18
200-BK-18
200-BK-18
113-OR-18
791-PK-18
786-GN-18
306-GN-18
A586-OR-18
501-GN-18
590-GY-18
105-RD-14
200-BK-18
615-YL-18
512-GN-18
6
A
154-RD-18
509-WH-18
511-BR-18
508-PU-18
A513-RD-18
8
6
7
4
2
5
1
3
592-BU-18
GND
IGN
592-BU-18
ATCH
HAMMER
PRESS SW
106-0181
1
2
A513-RD-18
200-BK-18
12V
MEM
24V
113-OR-18
103-RD-18
508-PU-18
200-BK-18
113-OR-18
103-RD-18
511-BR-18
6
B
B
INSP LAMP
2
AC
4
1
4
2
5
1
3
ANTENNA
200-BK-18
200-BK-18
200-BK-18509-WH-18
512-GN-188
7
1
2
3
4
5
6
2
1
B
R
NN (NOTE G)
1
2
NN
(NOTE G)
NN
(NOTE G)
189-RD
172-RD-18
L21
3
L20
L5
L11
L12
H
L6
E
CAB
U U
ATCH
REFUELING
START RELAY
111-4871
J
PLATFORM
A
ATCH POWER
WINDOW LIMIT SW
117-6306 (NOTE D)
E
E
E
+
L24
H
ONE TOUCH
LOW IDLE SW
128-2134
R
L19
ATCH
FLOW CONT.
PRESS SW
106-0181
1
2
SS
U
J
L16
HYD
LOCK SOL
121-1491
L15
L17
S
L14
+B
L. CHASSIS
L. BOOM
306-GN-18
WASH
W. LOW
W.INT (3)
GND
GND
LIGHT
RS485-
+B
MAIN
RS485+
W. CCW
W. CW
REV
STOP
GND
WASH
ACC
WA+
LOW
WIPER CUT
RISE. S
INT (3)
SPEAKER (+)
SPEAKER (-)
BUCK UP
GND
SPEAKER (+)
ACC (+)
ILLUMI (+)
SPEAKER (-)
WIPER
MOTOR
122-9603
WIPER CONT
155-7042
NEUTRAL START
LIMIT SW
111-4799
HORN SW
128-2134
L16
L15
L975-PK-18
AC
K997-BU-18
326-RD
SS
A
L20
L21
L19
L3
L18
L3
L18
AC
B
326-RD
L13
L10
L9
L8
E
K997-BU-18
L7
K905-RD-18
K905-RD-18
L14
L1
A
E
L7
AC
AJ
B
L1
WINDOW
LIMIT SW
124-3974 (NOTE E)
K905-RD-18
F
AC
ATCH
BOOM LAMP
5I-8250
K905-RD-14
L4
CHASSIS
OPERATOR STATION
S4
S3
S2
S1
COM
G (NOTE B)
L
AB
ATCH
CAB LAMP
111-4813
ATCH
AM/FM RADIO
111-4840
ATCH
REFUELING PUMP
123-3929
ATCH
REFUELING
START SW(NO)
6T-9442
T
R
R
HORN
7Y-3919
MM
NN
132-1827 A-4
121-1033 H-1
121-1041 D-7
121-1034 F-8
163-6682 F-8 (NOTE K)
128-8970 A-2
116-0073 E-7
116-0243 G-1
111-4835 B-2
153-2491 H-3
150-6999 D-3
121-0986 A-1
111-4795 G-1
153-2555 D-1
153-2536 F-8 (NOTE J)
111-4880 A-9
153-2534 A-3
116-0258 H-6
116-0103 H-3
111-4841 I-3
116-0096 A-4
150-6998 C-2
116-0099 H-3
116-0098 A-4
116-0084 E-7
121-1048 A-2
121-1044 A-6
128-8971 A-2
R
G (NOTE B)
L
K
NN (NOTE G)
K
+
-
1
2
ATCH
REFUELING
STOP RELAY
111-4871
NN (NOTE G)
H
R
MONITOR
106-0172
R
SWITCH PANEL
153-2500
KEY SW
9G-7641
H
TT
ATCH
REFUELING
STOP SW(NC)
9X-4184
NN (NOTE G)
L2
A/C PHOTO
SENSOR
128-2162
(NOTE H)
L3
2
1
ATCH LOWER
WIPER MOTOR
113-3452
+
-
L2
UU
S +1
-
MOTOR
SERVICE
METER
6T-7337
CHASSIS
LAMP
5I-8251
5I-8250 (NOTE G)
THROTTLE
POS SW
106-0107
ATCH
BOOM LAMP
5I-8250
MOTOR
NN (NOTE G)
E
E
E
R
C
S
B
E
F
OFF
F
ON
ST
AH
116-0237 D-4
128-8936 I-8
163-6691 F-8 (NOTE K)
111-4831 F-8
128-8937 F-8 (NOTE J)
111-4830 F-8
111-4829 F-8
128-8938 F-8 (NOTE J)
163-6693 F-8 (NOTE K)
111-4826 F-8 (NOTE J)
163-6692 F-8 (NOTE K)
CIGAR
LIGHTER
9W-0335
1
2
2
1
ATCH
AUX HYD
PRESS SW
106-0181
A
L7
HORN
7Y-3920
L6
(116-0177 HE08)
E93688
530-OR-18
530-OR-18
CONN 1
CONN 34
CONN 35
CONN 36
CONN 38
CONN 37
CONN 2
CONN 3
CONN 4
CONN 5
CONN 6
CONN 6
CONN 30
CONN 31 CONN 32 CONN 33
CONN 7
CONN 8
CONN 9
CONN 10 CONN 11 CONN 12
CONN 23
CONN 24
CONN 25 CONN 26 CONN 27 CONN 28
CONN 29
CONN 13
CONN 14
CONN 15
CONN 16
CONN 17
CONN 22
CONN 18
CONN 19 CONN 20
CONN 21
TO MACHINE STRUCTURE
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAUGE.
MOTOR
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.
MONITOR CIRCUIT.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE SHUTDOWN CIRCUIT.
ENGINE/PUMP CONTROL CIRCUIT.
START AID CIRCUIT.