
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Actuator — Governor
C-7
1 Seat — Heater E-4 36
Alarm — Action
E-2
3A Sender — Engine Coolant Temp C-12 19
Alarm — Travel
D-12
2 Sender — Hydraulic Oil Temp A-8 3F
Alternator
B-12
3 Sensor — Fuel Level A-5 20
Antenna
C-6
4 Sensor — Engine Speed B-12 21
Batteries
E-11
5 Solenoid — A/C Compress Clutch C-12 22
Block — Terminal
D-9
1D Solenoid — Engine Shutdown B-12 23
Breaker — Alternator
D-9
4D Solenoid — Fine Swing B-4 24
Controller
B-7
6 Solenoid — Hammer Control B-4 25
Converter
B-6
34 Solenoid — Level B-9 4F
Dial — Engine Speed
C-2
3B Solenoid — Travel Speed B-9 1F
Fuse — Block
F-7,8,9
6D Solenoid — Trenching B-9 2F
Horns
A-2
8 Switch — Boom Raise Pressure B-10 3E
Lamp — Boom
A-2
9 Switch — Disconnect D-9 5D
Lamp — Cab
E-1
10 Switch — Engine Oil Pressure B-12 28
Lamp — Chassis
A-2
11 Switch — Fine Swing Control F-3 6C
Lamp — Dome
C-6
12 Switch — Governor Backup B-5 6B
Lighter — Cigar
E-3
1A Switch — Hammer Control C-3 9B
Meter — Service
E-2
2A Switch — Horn F-2 3C
Monitor
E-2
4A Switch — Implement Swing Pressure B-10 1E
Motor — Lower Wiper
F-2
13 Switch — Low Idle D-3 2B
Motor — Starter
B-12
14 Switch — Neutral Start F-2 29
Motor — Washer
E-12
15 Switch — Pump Backup F-4 2C
Motor — Wiper
F-2
16 Switch — Radio Control E-4 7C
Pump — Refueling
A-3
17 Switch — Refrigerate Low Pressure E-12 30
Radio
C-6
18 Switch — Refueling A-5 31
Relay — Boom Lamp
E-8
7D Switch — Refueling Pump (start) A-3 32
Relay — Chassis/Cab Lamp
E-9
7D Switch — Refueling Pump (stop) A-3 32
Relay — Horn
E-7
7D Switch — Seat Heater F-3 4C
Relay — Main
D-7
3D Switch — Speed Change C-4 5B
Relay — Refueling Pump
E-7
7D Switch — Key Start B-2 1B
Relay — Starter
D-7
35 Switch — Travel Pressure B-10 2E
Relay — Washer
E-8
7D Unit — Air Conditioner E-6 33
Relay — Wiper
E-9
7D Unit — Heater E-6 37
Resistor — Backup
F-5
1C Valve — Proportional Reducing A-9 5F
Machine locations are repeated for components located close together.
Harness Connector Location
Connector
Machine
Location
Harness And/Or
Components
Schematic
Location
Connector
Machine
Location
Harness And/Or
Components
Schematic
Location
40 Contacts
CONN1
*
A - 111-4806
Controller
B-7
CONN23
A - 111-4806
K - 7Y-3868
F-3
24 Contacts
CONN2
*
A - 111-4806
Controller
A-7
CONN40
C - 5I-8268
A/C Clutch Solenoid
C-12
CONN9
D
A - 111-4806
B - 116-5513
D-10
CONN50
E
B - 116-5513
Boom Raise Press Sw
B-10
CONN8
D
A - 111-4806
B - 116-5513
E-10
CONN34
B - 116-5513
Q - 113-2486
A-4
CONN13
A
A - 111-4806
F - 117-5646
C-5
CONN49
B - 116-5513
Fuel Level Sensor
A-5
CONN3
D
A - 111-4806
G - 114-5267
E-9
CONN51
E
B - 116-5513
Implement Swing Press Sw
B-10
CONN5
D
A - 111-4806
G - 114-5267
F-9
CONN53
F
B - 116-5513
Level Solenoid
B-9
CONN6
D
A - 111-4806
G - 114-5267
F-9
CONN38
B - 116-5513
N - 7Y-3943
A-3
CONN24
A - 111-4806
H - 51-8215
D-4
CONN56
F
B - 116-5513
Proportional Reducing Valve
A-9
CONN18
B
A - 111-4806
J - 7Y-3921
D-5
CONN39
B - 116-5513
D - 116-8177
F-12
CONN17
C
A - 111-4806
L - 102-7902
F-5
CONN41
B - 116-5513
Refueling Pump
A-3
CONN4
D
B - 116-5513
G - 114-5267
D-9
CONN48
B - 116-5513
ZZ - 5I-8258
A-5
7 Contacts
CONN14
A
A - 111-4806
E - 6C-91 17
C-5
CONN47
B - 116-5513
S - 113-2485
A-4
6 Contacts
CONN10
D
A - 111-4806
B - 116-5513
D-10
CONN42
B - 116-5513
Engine Speed Sensor
B-12
CONN15
C
A - 111-4806
A/C Unit
E-6
CONN7
B - 116-5513
T - 5I-8255
A-3
CONN15
C
A - 113-1159
Heater Unit
E-6
CONN45
B - 116-5513
Travel Alarm
E-12
CONN19
B
A - 111-4806
J - 7Y-3921
D-5
CONN52
E
B - 116-5513
Travel Pressure Sw
B-10
CONN44
D
G - 114-5267
Governor Actuator
C-8
CONN55
F
B - 116-5513
Travel Speed Solenoid
B-9
CONN27
B
H - 5I-8215
Engine Speed Dial
C-2
CONN54
F
B - 116-5513
Trenching Solenoid
B-9
CONN58
D
A - 111-4806
A - 111-4806
C-8
CONN31
A
E - 6C-9117
Action Alarm
D-2
CONN33
M - 6C-9362
Lower Wiper Motor
F-2
CONN20
B
J - 7Y-3921
Attachment
B-3
CONN32
F - 117-5646
Wiper Motor
F-2
CONN22
B
J - 7Y-3921
Attachment
B-3
CONN30
A
E - 6C-9117
Monitor
E-2
CONN46
T - 5I-8255
Fine Swing Solenoid
B-4
CONN12
F - 117-5646
R - 7Y-8105
B-6
CONN37
U - 5I-8234
Hammer Control Solenoid
B-4
CONN25
A - 111-4806
H - 5I-8215
D-4
CONN68
C
A - 111-4806
Y - 106-0026
E-5
CONN25A
A - 111-4806
W - 5I-8374
E-3
CONN70
C
Y - 106-0026
Radio Control Sw
E-4
CONN25B
H - 5I-8215
W - 5I-8374
D-3
CONN71
B - 116-5513
V - 106-0026
A-9
CONN21
B
J - 7Y-3921
Attachment
B-3
CONN72
W - 5I-8374
X - 5I-8375
F-5
CONN64
R - 7Y-8105
Converter
B-6
CONN63
R - 7Y-8105
Converter
D-6
CONN60
C
L - 102-7902
Attachment
F-3
CONN61
C
L - 102-7902
Seat Heater Switch
F-3
CONN62
C
A - 111-4806
Seat Heater
E-4
CONN67
C
X-5I-8375
Fine Swing Control Sw
F-3
CONN26
B
H - 5I-8215
Low Idle Switch
D-3
CONN59
C
K - 7Y-3868
Horn Switch
F-3
*= Connector is located at the component.
2 Contacts
1 Contact
10 Contacts
5 Contacts
3 Contacts
4 Contacts
A
1
2
3
33
5
6
7
8
9
10
11
12
13
14
15
16
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
18
19
20
22
23
24
25
26
27
28
29
30
31
32
37
35
33
34
36
38
7
F
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
26
10
9
8
A
1
2
3
5
6
7
8
9
10
11
12
13
14
15
16
3
4
5
6
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
37
35
33
34
36
38
7
F
17
18
19
20
21
22
23
24
25
26
27
28
33
31
32
1
MACHINE HARNESS CONNECTOR AND COMPONENT LOCATIONS
3200369
1
2
3
4
5
6
7
8
3
2
1
3
4
5
6
8
9
1
3
2
1
2
7
AREA A
AREA B
330158
3200370
1
3
4
5
6
7
8
9
1
0
3
4
5
6
1
2
7
1
2
3
4
5
6
7
8
9
1
0
3
4
5
6
8
9
1
2
7
AREA C
AREA D
3200371
3200302
1
2
3
4
5
6
3
4
5
6
1
2
7
3
1
2
1
2
3
AREA E AREA F3200191 3200303
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.
SENR6242
August 1994
320, 320 N, 320 L And 320 S
Excavators Electrical System
9WG1161-UP
4ZJ597-UP
3XK1909-UP
6KM213-UP
©
1994 Caterpillar
All Rights Reserved
Printed in U.S.A.
5
4
4
3
1
2
1
1
1
7
3
6
7
7
2
9
3
8
5
6
1
7
8
29
30
7
28
11
12
1
13
14
2
3
15
4
16
17
18
19
20
21
22
3
1
2
2
6
8
25
26
8
9
31
33
27
4
5
6
10
5
3

78
9
101112
101112
BK
RD
BU
500-BR
501-GN 501-GN
501-GN
118-GY
200-BK
200-BK
500-BR
168-GN
168-GN
323-WH
513-OR
519-PK
1
168-GN
513-OR2
519-PK
1
2
3
4
501-GN
118-GY
200-BK
118-GY
501-GN
BK
RD
200-BK
575-YL
152-BU
576-PK
BK
RD
501-GN
200-BK
307-OR
326-PU
105-BR
310-PU
308-YL
200-BK
118-GY
308-YL
310-PU
105-BR
326-PU
307-OR
200-BK 200-BK
307-OR
326-PU
105-BR
310-PU
322-GY
616-BU
607-PK
323-WH
200-BK
308-YL
BK
RD
200-BK
200-BK
200-BK
200-BK200-BK
RD
BK
RD
BK
575-YL
200-BK
OR-18
200-BK
307-OR
135-BU
506-PU
6 5 4
BK-18
AM/FM RADIO
210-BK
307-OR
152-BU
575-YL
576-PK
306-GN
320-OR
200-BK
200-BK
309-GY 308-YL
OPERATOR STATION
RELAY PANEL
147-PU
578-BU
152-BU
575-YL
152-BU
576-PK
200-BK
586-BR
267-BK
235-BK
235-BK
235-BK
200-BK
586-BR
320-OR
200-BK
616-BU
616-BU
200-BK
BK/PK
152-BU
576-PK
306-GN
BK
BK-18
BK-18
326-PU
149-PU
105-BR
310-PU
5
114-GN
WH
BK
200-BK
200-BK
325-PK
149-PU
149-PU
115-PK
115-PK
115-PK
114-GN
114-GN
786-GN
586-BR
200-BK
365-YL
200-BK
325-PK
616-BU
200-BK
308-YL
322-GY
607-PK
365-YL
RD
BK
200-BK
200-BK
200-BK
200-BK
200-BK
OPERATOR STATION
F
E
D
200-BK
200-BK
200-BK
C
BK
RD
BR
GN
BU
PK
BK
200-BK
519-PK
B
RELAY PANEL
306-GN
RELAY PANEL
578-PU
BK
BK
200-BK
200-BK
122-BU
RD-18
BK-18
235-BK
495-GN
200-BK
200-BK
265-BK
491-PK
BK
YL
325-PK
365-YL
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
615-YL
A
506-PU
586-BR
147-PU
200-BK
2
200-BK
4
3
2
1
142-BU
142-BU
308-YL
615-YL
323-WH
500-BR
501-GN
118-GY
113-OR
120-YL
152-BU
103-YL
142-BU
152-BU
118-GY
121-YL
184-BU
103-YL
114-GN
323-WH
513-OR
607-PK
200-BK
616-BU
322-GY
307-OR
607-PK
306-GN
307-OR
1
200-BK
320-OR
200-BK
200-BK
200-BK
200-BK
322-GY
322-GY
200-BK
322-GY
616-BU
200-BK
200-BK
616-BU
200-BK
575-YL
152-BU
576-PK
9 8 7 6 5 4 3 2 1
F
E
D
3 2 1
C
B
A
D
F
E
B957-GN
ATCH
REFUELING RELAY
7Y-5490
B957-GN
NOTE A : USE WHEN ATCH HAMMER OR ATCH MEDIUM PRESSURE
ATCH HAMMER FOOT SW IS USEDNOTE H : CONNECT THIS WAY WHEN
NOTE G : HARNESS UU IS INSERTED BETWEEN HARNESS A AND H WHEN ATCH RPM
IS INSTALLED
NOTE J : USE WHEN ATCH FOPS IS INSTALLED
365-YL
365-YL
NOTE E : COMMON TO 322,320.
NOTE F : COMMON TO 322,320,325,330
1
2
B957-GN
B957-GN
PROVISION FOR ATCH
SW 7X-6386
TT 115-7126
UU 115-7125
RR 117-7253
SS 115-7124
PP 116-9209
QQ 117-7332
168-GN
B957-GN
X
2
1
ATCH
FINE SWING
CONT SW
7X-6386
D760-YL
200-BK
L27
L27
W
W
2
H
1
3 3
1
A
D760-YL
2200-BK
B786-BU
551-YL
547-OR
548-GY
551-YL
2
1
NOTE H
3
2
1
547-OR
3
2
1
551-YL
548-GY
551-YL
SS TT
PP PP
551-YL
548-GY
547-OR
551-YL
955-BU
547-OR
551-YL
955-BU
547-OR
551-YL
548-GY
547-OR
PP PP
TT SS
551-YL
548-GY
551-YL3
2
1
TT TT
ATCH BOOM DOWN
SOL. 4I6158
2
1
TT TT
1
2
547-OR
SS
ATCH HAMMER
CONT.SOL.
7Y5005
3
2
1
ATCH SERVICE
METER
6T7337
-
+
548-GY
551-YL
548-GY
551-YL
548-GY
551-YL
- +
ENGINE SPEED
CONTROL
1
2
TT
ATCH HAMMER
CONT. SOL.
116-4416
ATCH RPM REGULATOR
116-9958
K973-PK
K974-PU
K975-WH
K976-BR
200-BK
A755-PK
A756-BU
A757-GY
A758-BR
1
2
3
4
M
200-BK
ATCH
COMBINED SOL
A QQ
QQ
QQ
ATCH
LIMIT-SW
3T3132
952-OR
QQ
200-BK
1
2
952-OR
1
2
3
4
1
2
3
4
152-BU
L24
152-BU
D761-GN
586-BR
L24
L34
F
+
S
+1
-
MOTOR
M
MOTOR
-
+1
S
+
MM 113-9860
NN 112-3336
L38
L37
L31
L31
L30
L30
L36
F
F
UPPER WIPER
6C9102
615-YL
200-BK
LOWER WIPER
6C8438
LA
200-BK A770-PK
4
3
2
1
A
2
1
124-GN
519-PK
L11
147-PU
124-GN
A537-PK
2
1
F
8103 YL/RD8103 YL/RD 2
1
F
B957-GN
168-GN
PROVISION FOR
BEACON LIGHT
6 DIN 46327
NOTE B : USE WITH CAB RISER
L40
NOTE E
NOTE E
NOTE F
NOTE J
JJJ 6C-9134 E-1 NOTE J
D-4 NOTE F
D-2 NOTE F
2
1
D-1 NOTE F
C-3 NOTE F
F-1 NOTE E
200-BK
A
B747-PU
185-YL
A768-BU
A769-GY
B730-OR
B731-WH
B747-PU
200-BK
Z 117-7029 E-4
Y 106-0026 E-4
ATCH RADIO SW
YA
ATCH
RADIO SW
7X-6386
122-BU
120-YL
2
1
120-YL
B747-PU
B747-PU
B747-PU
B747-PU
B747-PU
147-PU
1
2
A-6 NOTE E
200-BK
B747-PU
147-PU
WINDSHIELD SW
9G2795
124-GN
A537-PK
9
6
8
124-GN-14
519-PK
615-YL
103-YL
200-BK-14
2
ATCH
A/C UNIT
107-1994
2
A
1
3
4
5
NOTE D : USE WITH COLD WEATHER.
D761-GN
ZZ 5I-8258 A-5
D761-GN
U 5I-8234 B-3
D760-YL
L25
BK-00
200-BK
306-GN
308-YL
607-PK
D760-YL
D761-GN
D760-YL
147-PU
147-PU
D761-GN
147-PU
607-PK
142-BU-14
D761-GN
616-BU
147-PU
D760-YL
ATCH FINE SWING
RELAY
7Y-5490
147-PU
200-BK-4
FINE SWING
RISER PLATFORM
FF
(NOTE B)
D760-YL
L28
ATCH
FINE SWING
SOL
4I-1042
W
D760-YL
200-BK
BK-00
200-BK
2
200-BK
BOOM RAISE SW
102-8042
200-BK
1
2
A761-PU
184-BU
A983-BU
792-OR
791-PK
B
786-GN
200-BK
L15
200-BK
B751-YL
A763-GY
A761-PU
113-OR
L25
304-WH-8
101-RD-6
109-OR-6
101-RD-14
109-OR-6
101-RD-14
101-RD-6
309-GY
109-OR-6
XX
G
G
WW
G
GG
YY
109-OR-8
G
A761-PU
792-OR
791-PK
112-PU-14
786-GN
112-PU-14
184-BU
112-PU-14
A983-BU
B751-YL
A763-GY
113-OR
615-YL
120-YL
147-PU
152-BU
124-GN-14
129-BU
118-GY
20A
15A
142-BU-14
113-OR
10A
B751-YL
A763-GY
A761-PU
200-BK
113-OR
A769-GY
B-1 NOTE F
B-1 NOTE F
LEVEL FINISH
SOL
7I-1246
1
2
B955-YL
B956-PK
113-OR
200-BK
E
H
GROUND
+12 VOLT
+ BATTERY
GROUND
1
2
3
2
1
F-3 NOTE F
ATCH
CONVERTER
108-9968
ATCH
ANTENNA
106-0036
3
1
4
2
R
R
R
R
TO RADIO
122-BU
H
B
AB
PLATFORM
D760-YL
122-BU
124-GN-14
103-YL
235-BK
615-YL
D761-GN
615-YL
103-YL
120-YL
500-BR
501-GN
D760-YL
118-GY
113-OR
129-BU
403-GN
410-WH
B955-YL
B956-PK
B731-WH
B730-OR
A769-GY
A768-BU
185-YL
185-YL
200-BK
147-PU
586-BR
152-BU
A763-GY
B751-YL
B739-WH
200-BK-6
B789-BR
B740-OR
B790-OR
B786-BU
326-PU
308-YL
310-PU
105-BR
A758-BR
A757-GY
A756-BU
D764-GN
A755-PK
RD-00
200-BK
320-OR
10
1
2
3
4
5
9
8
7
6
B734-GY
306-GN
1
2
D764-GN
L
L8
NOTE G
UU
UU
K973-PK
K974-PU
K975-WH
K976-BR
200-BK
A755-PK
A756-BU
A757-GY
A758-BR
UU
K973-PK
K974-PU
K975-WH
K976-BRA758-BR
A757-GY
A756-BU
H
A755-PK
6
7
8
9
5
4
3
2
1
10
L34
10
1
2
3
4
5
9
L7
8
7
6
L4
L4
5
4
3
1
BB
B B
BB
AA
EE
B
B
B
B
GB
G
A
G
G
546-BU
B734-GY
547-OR
550-OR
548-GY
550-OR
549-PK
1
A
2
3
546-BU
B734-GY
547-OR
550-OR
C
B
C
BB
C
B
C
C
C
C
RESISTOR
7Y-8242
A537-PK
200-BK
PP
129-BU
K
200-BK
ZZZZ
MOTOR
PP
KK
CHASSIS
RR
RH-SW
LH-SW
ONE TOUCH LOW
IDLE SW
H
H
RR
A755-PK
RR
RR
RR
548-BU
198-PK
198-PK
549-PK
RR
10
6
5
4
2
9
7
8
1
A
A756-BU
A757-GY
L32
500-BR
501-GN
EE
B751-YL
200-BK
B740-OR
185-YL
B789-BR
B739-WH
4
6
1
3
B731-WH
5
2
B790-OR
A763-GY
185-YL
2
147-PU
D761-GN
1
185-YL-14
578-BU
586-BR
2
7
8
9
5
4
3
6
1
10
B730-OR
KK
3
2
1
1
2
PLATFORM
2
1
D761-GN
2
1
1
B734-GY
ATCH-AUX. VALVE
6C6664
10
1
2
3
4
5
9
8
7
6
U
586-BR
U
200-BK
3
2
1
2
PP
PP
PP
B734-GY
200-BK
B734-GY
147-PU
198-PK
955-BU
198-PK
2
2
1
1
ATCH-HAMMER FOOT
SW
ATCH-PRESSURE SW
SAFETY
1
2
T
200-BK
T
578-BU
311-WH
311-WH
WW
6
310-PU
200-BK
513-OR
1
152-BU
B955-YL
2
124-GN
A537-PK
403-GN
A770-PK
200-BK
200-BK
323-WH
112-PU-14
147-PU
1
2
A768-BU
B737-GN
3
A771-PU
A769-GY
5
4
3
2
1
A768-BU
10
763-BU
1
2
B965-GY
B964-YL
142-BU-14
491-PK
1
D761-GN
112-PU-14
1
2
A-6 NOTE E
586-BR
616-BU
3
322-GY
607-PK
323-WH
200-BK
365-YL
F-12
112-PU-14
4
112-PU-14
235-BK
495-GN
A762-PU
B
A
147-PU
UNLESS OTHERWISE SPECIFIED ALL WIRE IS 16 GAGE.
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF.
THIS SCHEMATIC IS FOR THE 320 EXCAVATOR (7Y-3908-02).
JJ 111-4727 E-10
HH 7Y-3946 E-10
GG 4I-5330 E-11
FF 7G-1060 F-6
EE 7Y-8299 A-12
DD 7Y-3947 D-9
CC 111-4732 E-10
BB 7Y-3946 E-10
AA 111-4807 E-11
CABLE AS.
A
VV 7Y-3941 D-7
WIRE AS.
A
R 7Y-8105 B-6
112-PU-14
FF
CAB
791-PK
4
788-YL
405-GY
PLATFORM
RISER (NOTE B)
CHASSIS
5
9
326-PU
PLATFORM
B
492-GY
101-RD-6
304-WH-8
A A
E
E
AA
VV
J
B
B
P 7Y-3994 A-2
N 7Y-3943 B-2
M 6C-9362 F-2
L 102-7902 E-5
K 7Y-3868 F-3
H 5I-8215 D-4
G 114-5267 F-9
F 117-5646 E-2
KK 115-1263
LL 114-4876
B 116-5513 B-9
GY
PU
BR
RED
WHITE
ORANGE
YELLOW
PINK
ABBREV COLOR
BLACK
GRAY
PURPLE
BROWN
DESCRIPTIONSYMBOL
CONNECTOR
ELECTRICAL CONNECTION
TO VEHICLE STRUCTURE
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
403-GN
A762-PU
C
B
109-OR-6
B
B
F
E
F
A
B
B
B
B
LA
A
J
309-GY
HARNESS AS.
L
ATCH HAMMER-AHC CONT.
SW 7X6388
235-BK
120-YL
D764-GN
CHASSIS
B965-GY
2
1
3
CAB E
B
788-YL
ATCH
BOOM LAMP
5I-8250
8
B964-YL
B737-GN
A771-PU
A762-PU
788-YL
763-BU
A769-GY
A768-BU
763-BU
495-GN
L1
L2
L7
152-BU
492-GY
B965-GY
B964-YL
491-PK
586-BR
616-BU
BK-00
142-BU-14
405-GY
1
2
321-BR
491-PK
L1
ATCH
SEAT HEATER
B956-PK
ATCH-PRESSURE SW
6C6806
ATCH-BUZZER
113-4683
ATCH-SW AS.ROCKER
7X6386
YL
BR586-BR
CHASSIS
A769-GY
586-BR
304-WH-8
310-PU
616-BU
OPERATOR STATION OPERATOR STATION
101-RD-6
326-PU
576-PK
109-OR-6
403-GN
578-BU
322-GY
519-PK
586-BR
BK-00
309-GY
G
607-PK
A769-GY
616-BU
A768-BU
322-GY
A768-BU
323-WH
B734-GY
121-YL
365-YL 410-WH
365-YL
235-BK
A758-BR
506-PU
A757-GY
495-GN
A756-BU
607-PK
A762-PU
788-YL
405-GY
A755-PK
326-PU
D761-GN
513-OR
200-BK
B786-BU
103-YL
142-BU-14
FUEL
SENSOR
105-9993
5
6
7
2
B956-PK
101-RD-6
B955-YL
365-YL
B789-BR
B737-GN
S4
S3
S2
S1
COM
B790-OR
403-GN
B739-WH
112-PU-14
304-WH-8
B740-OR
326-PU
B730-OR
B731-WH
311-WH
10
A771-PU
403-GN
1
109-OR-6
309-GY
2
NN
3
B747-PU
4
200-BK
6
4
3
1
5
2
6
4
3
152-BU
B789-BR
575-YL
A769-GY
308-YL
ATCH
REFUELING SW
5C-6108
492-GY
RD-00
A768-BU
403-GN
OPTION SOLENOID
575-YL
COOLANT LEVEL SW
ENG OIL LEVEL SW
OPTION SENSOR
OPTION SW 1
OPTION SW 2
B956-PK
200-BK
ATCH CONT.
GP RH
113-2531
NOTE A
4I6168
Z
G
B
OPTION RELAY 3
OPTION RELAY 2
OPTION RELAY 1
GLOW
RS232C RxD
RS232C TxD
PWM OUT -
PWM OUT +
200-BK
L39L39
149-PU
323-WH
115-PK
A758-BR
405-GY
ATCH
REFUELING PUMP
6C-5572
S
B
B
1
168-GN
B957-GN
5
5
2
9
501-GN
168-GN
B957-GN
308-YL
B731-WH
B789-BR
200-BK
1
185-YL
ALTERNATOR
9W-3043
VV
322-GY
TRAVEL SW
102-8041
308-YL
121-YL
HORN SW
6I-5088
HORN
7T-0969
500-BR
147-PU
SERVICE
METER
6T-7337
152-BU
A
113-OR
B730-OR
A769-GY
A768-BU
320-OR
A768-BU
B955-YL
YL
185-YL
A771-PU
124-GN-14
129-BU
185-YL-14
105-BR
ATCH-PRESSURE SW
101-3082
ATCH REFUELING PUMP
START SW(NORMALY OPEN)
9X4959
1
2
H
N
P
P
N
ATCH REFUELING PUMP
STOP SW(NORMALY CLOSED)
9X4959
QQ
306-GN
NN
DOME LAMP
096-0721
RR
HYD OIL
SENDER
4I-5394
WASHER RELAY
WIPER RELAY
CHASSIS LAMP RELAY
BOOM LAMP RELAY
GND
GND
+B (24V)
BACKUP SW 1
RS485 -
RS485 +
BACKUP SW 4
B964-YL
GOV ACTR -
ENG PICKUP SENSOR -
GOV ACTR SENSOR
TRAVEL SW
ENG PICKUP SENSOR +
TRAVEL SOLENOID
FUEL LEVEL SENSOR
COOLANT SENDER
HYD OIL TEMP SENDER
TRAVEL ALARM
306-GN
NN
198-PK
B790-OR
615-YL
142-BU
410-WH
B965-GY
B739-WH
142-BU
763-BU
ATCH
TRAVEL ALARM
3T-1444
142-BU
NOTE C : USE WITH SHORT BOOM.
SOL
5I-8368
3
2
1
PLATFORM
MM
551-YL
549-PK
548-GY
198-PK
147-PU
550-OR
LL
301-BU-10
MM
L21
AA
B790-OR
BU
578-BU
B789-BR
B789-BRB790-OR
410-WH
B790-OR
185-YL
B740-OR
+
-
1
1
2
CAB/CHASSIS LAMP
308-YL
607-PK
322-GY
323-WH
200-BK-10
112-PU-14
506-PU
308-YL
491-PK
A771-PU
B737-GN
B965-GY
200-BK
323-WH
500-BR
506-PU
L13
586-BR
519-PK
310-PU
578-BU
103-YL
2
B964-YL
763-BU
118-GY
495-GN
ENG GOV
ACTR
102-8005
200-BK
A761-PU
L17
2
1
G
7
6
L17
L23
1
2
101-RD-6
1
RR
PP
326-PU
492-GY
321-BR
L13
A762-PU
ATCH
START AID
COOLANT TEMP SW
8C-3569
L20
616-BU
786-GN
184-BU
L20
L17
A983-BU
792-OR
405-GY
788-YL
492-GY
200-BK
200-BK
405-GY
309-GY
L16
L12
109-OR-6
L12
326-PU
403-GN
325-PK
L14
L13
5
513-OR
L11
4
L38
3
L9
200-BK-6
513-OR
F
L7
311-WH
J
T
J
J
H
2
788-YL
A762-PU
L6
ATCH
START AID
9G-4365
YY 4I-5450 D-9
RD-00
403-GN
L5
BK-00
B
200-BK
L3
200-BK-10
L6
200-BK
L5
BK-00
P 4I-5396 A-2 NOTE C
301-BU-10
L9
RD-00 RD-00
2
2
B734-GY
308-YL
410-WH
1
A758-BR
A757-GY
L6
A756-BU
A755-PK
B786-BU
B956-PK
200-BK
4
B955-YL
3
B789-BR
B790-OR
RD-00
B739-WH
2
1
B737-GN
2
1
B740-OR
495-GN
109-OR-8
235-BK
B730-OR
365-YL
365-YL
506-PU
BK-00
323-WH
607-PK
B731-WH
322-GY
XX 4I-5447 D-9
L26
142-BU-14
L3
616-BU
586-BR
322-GY
D 116-8177
200-BK
2
1
513-OR
A
200-BK
121-YL
1
T
COOLANT TEMP
SENDER
4I-5394
501-GN
304-WH-8
MOTOR
C
C
C
B
B
304-WH-8
B
GG
AA
B
BATMTR
S
G
B
IMPLEMENT SW
102-8041
B
L18
YY
XX
WW
WW
JJ
CC DD
60A
BB
LL
JJ
506-PU
JJ
L2
L1
B
K
E
L2
L8
L8
KEY START SW
9G-7641
200-BK
H
SS
403-GN
GOV ACTR +
S 113-2485 A-4
T 5I-8255 B-3
491-PK
142-BU-14
763-BU
B965-GY
B964-YL
A768-BU
A769-GY
PU
PLATFORM
321-BR
1
A
129-BU
519-PK
113-OR
ATCH
REFUELING RELAY
7Y-5490
2
501-GN
578-BU
L26
WW 4I-5448 D-9
118-GY
B957-GN
311-WH
A755-PK
501-GN
BK
576-PK
L26
5
5
4
3
B751-YL
1
STARTER
8C-4774
B751-YL
B789-BR
PP
A763-GY
D764-GN
RD-00
321-BR
L29
310-PU
200-BK
200-BK-14
121-YL
615-YL
V 117-7028 A-9
198-PK
147-PU
550-OR
8
10
200-BK
7
7
3
1
2
5
L28
122-BU
L12
6
Y
B
L13
B
L27
551-YL
549-PK
548-GY
L15
X
105-BR
410-WH
307-OR
326-PU
B-
RD-00
B789-BR
168-GN
B957-GN
Q
L8
L35
118-GY
168-GN
B957-GN
547-OR
546-BU
198-PK
Z
1
2
1
2
3
4
5
6
547-OR
546-BU
198-PK
551-YL
549-PK
548-GY
198-PK
147-PU
550-OR
198-PK
L36
200-BK
548-GY
550-OR
549-PK
546-BU
B734-GY
547-OR
550-OR
547-OR
546-BU
198-PK
3
2
1
L35
198-PK
147-PU
550-OR
551-YL
549-PK
548-GY
551-YL
548-GY
547-OR
551-YL
955-BU
547-OR
L33
200-BK
L32
102-8041
615-YL
501-GN
118-GY
WASHER
7T-8890
ATCH
LOWER WASHER
7T-8890
311-WH
321-BR
310-PU
2
1
308-YL
310-PU
500-BR
1
4
586-BR
200-BK
D761-GN
L37
H
A
A756-BU
H
A
500-BR
B739-WH
B790-OR
615-YL
B740-OR
A763-GY
103-YL
2
1
2
17
ENG/PUMP
CONT
106-0132
18
1
2
24
23
16
13
3
12
4
5
6
18
14
9
22
118-GY
1
7
8
21
2
20
B
19
17
15
10
11
10
11
21
31
23
28
8
9
6
7
19
20
30
40
36
37
38
39
29
27
13
2
1
CHASSIS
LAMP
5I-8251
HEATER UNIT
107-1995
ACCEL
BACKUP SW
7N-8008
SPEED
CHANGE SW
3T-4405
ENGINE
SPEED DIAL
7Y-5465
BACKUP
RESISTOR
102-8015 BACKUP SW
3T-4405
ATCH
HAMMER
CONT SOL
7Y-5005
CIGAR
LIGHTER
9W-0335
NEUTRAL
START SW
9W-2150
3E-6328
MONITOR
7Y-5500
ONE TOUCH
LOW IDLE SW
6I-5088
LOW IDLE SW
578-BU
ATCH
BOOM LAMP
5I-8250
200-BK
24
14
35
25
3
2
168-GN
105-BR
308-YL
BACKUP SW 2
1
15
16
26
SIG
GND
OR
24V+
M
A768-BU
184-BU
2
4
SIG
GND
5V+
5
113-OR
EPR VALVE +
EPR VALVE -
1
3
34
33
MONITOR ALARM
KEY SW
AUX HYD PRESS. SW
32
22
L15
L20
12
506-PU
200-BK
519-PK
121-YL
513-OR
R
C
L22
S
B
A983-BU
792-OR
200-BK
791-PK
786-GN
267-BK
266-BK
265-BK
OFF
264-BK
235-BK
L33
235-BK
RELAY PANEL
ON
ST
ENG
SHUTDOWN SOL
9X-5524
ENG OIL
SW
6T-1546
CHASSIS
B
B751-YL
BOOM RAISE PRESS. SW
D764-GN
BK-18
RD-18
ENGINE
SPEED SENSOR
3E-7886
2
1
121-YL
168-GN
B957-GN
ATCH REFRIGERANT
SW 114-5334
D
200-BK
A983-BU
G
109-OR-6
200-BK
BK-00
200-BK
REFUELING
120-YL
D760-YL
L21
147-PU
L10
ATCH SEAT
HEATER SW
7X-6386
200-BK-14
103-YL
615-YL
500-BR
501-GN
118-GY
120-YL
2
1
6
122-BU
7
8
9
5
JJ
HH
GG
CC
BB
BK-00
POS
NEG
B734-GY
4
NEG
POS
BATTERY
3T-5760
3
2
POS
NEG
L22
DISCONNECT SW
7N-0718
7N-0719 (NOTE D)
BLOCK AS.
7Y-5499
LOWER WASHER/WIPER
FUSE
10A 9W-1442
15A 9W-1441
20A 9W-1446
L11
L18
4
L11L11
L18L14
L15
L16
L19
TRAVEL SPEED
SOL
7I-1245
TRENCHING SOL
7I-1247
L19
L17
L13
NEG
POS
L22
L23
1
10
5
7
8
3
2
1
9
4
HAMMER
A/C HEATER
6
10
CIGAR LIGHTER
BACKUP
START RELAY
9X-8124
MAIN RELAY
3T-0376
ALT BREAKER
9S-0174
200-BK
KEY SW
WASHER/WIPER
TRAVEL ALARM
ENG/PUMP CONT
DOME LAMP
HORN
SOLENOID
MONITOR
RADIO
10
1
2
3
4
5
9
8
7
BOOM LAMP
6
7
8
9
5
4
3
2
1
10
HORN RELAY
7Y-5490
BOOM LAMP RELAY
7Y-5490
WASHER RELAY
7Y-5490
CAB/CHASSIS LAMP
RELAY
7Y-5490
WIPER RELAY
7Y-5490
6
10A
10A
3
10A
10A
2
1
BU-18
B+
W
D
ALT
ATCH
A/C CLUTCH
SOL
101-1759
T
10A
10A
10A
20A
ALTERNATOR (R TERM.)
10A
10A
15A
KK
10A
HARNESS CODE 1
HARNESS CODE 2
HARNESS CODE 3
HARNESS CODE 4
152-BU
103-YL
320-OR
147-PU
124-GN-14
129-BU
185-YL-14
105-BR
113-OR
ENG OIL PRESS. SW
MOTOR
A758-BR
ATCH
START AID SW
7X-6387
2
A757-GY
519-PK
124-GN-14
A763-GY
200-BK-4
HYD OIL LEVEL SW
A757-GY
YL
BK
WH
10A
10A
B790-OR
THROTTLE DIAL S4
THROTTLE DIAL S3
THROTTLE DIAL S2
THROTTLE DIAL S1
IMPLEMENT SW
L23
TRENCHING SOLENOID
LEVEL FINISH SOLENOID
2
1
113-OR
B
168-GN
B957-GN
546-BU
550-OR
547-OR
L36
L35
200-BK
2
1
200-BK
A758-BR
403-GN
B
+
-
B786-BU
129-BU
GROUND
DATA -
DATA +
A756-BU
A755-PK
439-YL
10A
200-BK
15A
200-BK
615-YL
10A
ATCH
CAB LAMP
5I-8250
K
+BATTERY
4
3
2
X 5I-8375 E-5
10A
B734-GY
2
1
B786-BU
1
PROVISION FOR ATCH
SW 7X-6387
(LH CONSOLE)
ATCH
CAB LAMP
5I-8250
L40
AUX.CIRCUIT IS INSTALLED
JJJ
615-YL
615-YL
200-BK
200-BK
200-BK
JJJ
V
Z
V
Z
PROVISION FOR ATCH
SW 7X-6388
(RH CONSOLE)
200-BK
CAB
CAB
308-YL
RH-SW
LH-SW
K
K
HORN
7T-0970
HORN SW
ATCH CONT.GP LH
1132531
NOTE A
198-PK
547-OR
A
2
546-BU
198-PK
1
LL
LL
LL
L10
LL
3
W 5I-8374 D-3
ATCH
3T-5760
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.
ENGINE/PUMP CONTROLLER CIRCUIT.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
ENGINE SHUTDOWN CIRCUIT.
START AID CIRCUIT.
CONN 38
CONN 41
CONN 37
CONN 46
CONN 74
CONN 34
CONN 22
CONN 21
CONN 20
CONN 28
CONN 30
CONN 31
ACTION ALARM
CONN 59
CONN 23
CONN 67
CONN 61
CONN 60
CONN 72
CONN 17
CONN 68
CONN 70
CONN 62
PUMP
CONN 15
CONN
18
CONN 19
CONN 25
CONN 24
CONN
13
CONN 14
CONN 49
CONN 48
CONN 64
CONN 63
CONN 12
CONN 1
CONN 2
CONN 58
CONN 44
CONN 55
CONN 54
CONN 53
CONN 56
PROPORTIONAL
REDUCING VALVE
CONN 4
CONN 3
CONN 6
CONN 5
BATTERY
CONN 8
CONN 9
CONN 10
CONN 52
CONN 51
CONN 50
CONN 40
CONN 45
CONN 39
CONN 15
CONN 25A
CONN 25B
CONN 33
CONN 32
A 111-4806 D-4
C 5I-8268 B-12
E 6C-9117 E-2
J 7Y-3921 D-5
Q 113-2486 A-4
CONN 27
