330 & 330 L EXCAVATORS ELECTRICAL SYSTEM SCHEMATIC

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.
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
Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Actuator - Governor
C-10 1
Sensor - Speed
C-15 19
Alarm - Action
E-2 3A
Solenoid - Air Conditioner Compress Clutch
E-15 20
Alarm - Travel
E-14 2
Solenoid - Creeper Speed Control
B-15 46
Alternator
D-14 3
Solenoid - Engine Stop
B-14 21
Antenna
E-11,12 4
Solenoid - Fine Swing
C-6 22
Battery
A-2 5
Solenoid - Hammer Control
D-5 23
Block - Terminal
B-4 1D
Solenoid - Level
B-12 1F
Breaker
A-9 5D
Solenoid - Start Aid
F-14 25
Controller
B-10 6
Solenoid - Travel Speed
A-12 3F
Converter
E-12 7
Solenoid - Trenching
A-12 2F
Dial - Engine Speed
E-5 3B
Speaker
D-11 28
Fuse - Block
B-6, 7, 9 7D
Switch - Aux Hydraulic Press
E-2 29
Horn
C-2, D-2 8
Switch - Boom Raise Press
D-12 3G
Lamp - Boom
C-1, D-1 9
Switch - Creeper Speed Control
F-7 6C
Lamp - Cab
E-1, F-1 43
Switch - Disconnect
A-3 6D
Lamp - Chassis
C-2 10
Switch - Engine Oil Press
C-15 31
Lamp - Dome
E-11 42
Switch - Fine Swing Control
F-7 4C
Lighter - Cigar
E-3 1A
Switch - Governor Backup
E-9 78
Meter - Service
E-2 2A
Switch - Hammer Control
E-7 10B
Monitor
E-2 4A
Switch - Horn
F-5 3C
Motor - Lower Wiper
E-2 11
Switch - Implement Swing Press
D-12 1G
Motor - Starter
A-14 12
Switch - Low Idle
E-5 2B
Motor - Washer
F-13 13
Switch - Lower Washer
E-7 8B
Motor - Wiper
F-2 14
Switch - Lower Wiper
E-7 9B
Pump - Refueling
F-15 15
Switch - Neutral Start
F-3 33
Relay - Boom Lamp
B-7 8D
Switch - Pump Backup
F-8 2C
Relay - Chassis/Cab Lamp
B-9 8D
Switch - Radio Control
F-7 7C
Relay - Fine Swing
A-9 8D
Switch - Refrigerant Low Press
F-15 34
Relay - Horn
B-6 8D
Switch - Refueling
E-13 35
Relay - Main
C-9 4D
Switch - Refueling Pump
E-15 36
Relay - Main
B-8 9D
Switch - Seat Heater
F-7 5C
Relay - Refueling Pump
A-6 8D
Switch - Speed Change
E-8 68
Relay - Starter
B-7 3D
Switch - Starter
E-6 1B
Relay - Washer
B-7 8D
Switch - Start Aid
E-5 4B
Relay - Wiper
B-9 8D
Switch - Start Aid Coolant Temperature
D-15 37
Resistor - Backup
F-9 1C
Switch - Travel Press
F-2 47
Seat With Seat Heater
F-10 45
Tuner
E-11 39
Sensor - Engine Coolant Temperature
D-15 16
Unit - Air Conditioner
F-10 40
Sensor - Fuel Level
F-13 17
Unit - Heater
F-10 44
Sensor - Hydraulic Oil Temperature
B-11 5F
Valve - Proportional Reducing
A-12 4F
HARNESS CONNECTOR LOCATION CHART
Connector
Machine
Location
Harness And/Or
Components
Schematic
Location
Connector
Machine
Location
Harness And/Or
Components
Location
40 Contacts
CONN1
*
RR - 105-9998
Controller
A-10
CONN30
A
E - 111-4712
Monitor
E-2
24Contacts
CONN2
*
RR - 105-9998
Controller
B-10
CONN12
F - 51-8216
T - 7Y-8139
D-10
CONN9
E
A - 106-0025
RR - 105-9998
D-4
CONN32
G - 51-8217
Wiper Motor
F-2
CONN10
E
A - 106-0025
RR - 105-9998
D-4
CONN12
F - 51-8216
U - 7Y-81 05
E-12
CONN11
E
A - 106-0025
RR - 105-9998
D-4
CONN28
A - 106-0025
C - 105-9930
F-4
CONN8
E
A - 106-0025
RR - 105-9998
D-5
CONN25
A - 106-0025
H - 51-8215
E-6
CONN13
A
A - 106-0025
F - 51-8216
E-10
CONN46
H
D - 7Y-8127
Engine Coolant Temp Sensor
D-15
CONN24
A - 106-0025
H - 5l-8215
E-6
CONN41
D - 7Y-81 27
Engine Oil Press Switch
C-15
CONN18
B
A - 106-0025
J - 7Y-3921
E-9
CONN21
B
J - 7Y-3921
Lower Wiper Switch
E-7
CONN17
C
A - 106-0025
L - 102-7902
F-9
CONN69
U - 7Y-81 05
Converter
E-12
CONN50
H
RR - 105-9998
C - 105-9930
D-13
CONN25A
A - 106-0025
MM - 5l-8374
E-6
CONN6
D
RR - 105-9998
M - 111-4720
B-3
CONN25B
H - 51-8215
MM - 5l-8374
E-6
CONN5
D
RR - 105-9998
M - 111-4720
B-4
CONN79
T - 7Y-8139
Speaker
D-11
CONN4
D
RR - 105-9998
M - 111-4720
B-4
CONN84
UU - 7Y-8139
Speaker
D-11
CONN43
RR - 105-9998
D - 7Y-8127
C-13
CONN29
A - 106-00250
Aux Hydraulic Press Switch
E-2
9 Contacts
CONN67
T - 7Y-81 39
Tuner
E-11
CONN23
A - 106-0025
K - 7Y-3868
F-6
CONN14
A
A - 105-0025
E - 111 -471 2
E-10
CONN7
E
A - 106-0025
S - 7Y-5508
D-5
CONN3
D
RR - 105-9998
M - 111 -4720
B-5
CONN59
G
RR - 105-9998
Boom Raise Press Switch
D-12
6 Contacts
CONN34
F - 51-821 6
G - 51-821 7
E-1
CONN56
F
RR - 105-9998
Proportional Reducing Valve
A-12
CONN15
C
A - 105-0025
Air Conditioner Unit
F-11
CONN52
G
RR - 105-9998
Implement Swing Press Switch
D-12
CONN15
C
A - 105-0025
Heater Unit
F-10
CONN53
F
RR - 105-9998
Level Solenoid
B-12
CONN19
B
A - 105-0025
J - 7Y-3921
E-9
CONN38
RR - 105-99980
P - 7Y-3988
D-2
CONN44
RR - 105-9998
Governor Actuator
C-11
CONN47
H
D - 7Y-81 27
Start Aid Coolant Temp Switch
D-15
CONN27
B
H - 51-821 5
Engine Speed Dial
E-5
CONN51
RR - 105-9998
Travel Press Switch (Right)
F-2
CONN33
A - 105-0025
Lower Wiper Motor
F-2
CONN83
E
A - 106-0025
RR - 105-9998
D-3
CONN58
D
RR - 105-9998
RR - 105-9998
A-10
CONN82
A - 106-0025
Travel Press Switch (Left)
F-2
CONN55
F
RR - 105-9998
Travel Speed Solenoid
A -12
CONN65
W - 105-9934
Refueling Pump
F-14
CONN54
F
RR - 105-9998
Trenching Solenoid
A-12
CONN64
W - 105-9934
Refueling Pump Switch
E-14
CONN63
RR - 105-9998
V - 51-8284
C-6
CONN62
V - 51-8284
Fine Swing Solenoid
C-6
CONN49
C - 105-9930
Fuel Level Sensor
F-13
CONN71
C
A - 106-0025
Seat With Seat Heater
F-10
CONN39
C - 105-9930
Refrigerant Low Press SW
F-15
CONN72
F
RR - 105-9998
X - 51-8345
A-12
CONN48
C - 105-9930
Start Aid Solenoid
F-14
CONN73
X - 51-8345
Creeper Speed Control Solenoid
A-15
CONN45
C - 105-9930
Action Alarm
E-14
CONN74
X - 51-8345
Creeper Speed Control Solenoid
A-15
CONN66
C - 105-9930
W - 105-9934
E-14
CONN80
C
A - 106-0025
PP - 106-0027
F-8
CONN40
D - 7Y-8127
A/C Compressor Clutch Sol
E-15
CONN81
C
SS - 106-0026
Radio Control Switch
F-8
CONN42
D - 7Y-8127
Speed Sensor
C-15
CONN75
C
L - 102-7902
Seat Heater Switch
F-7
CONN31
A
E - 111-4712
Alarm Fault
E-2
CONN76
C
L - 102-7902
Creeper Speed Control Switch
F-7
CONN36
F - 51-8216
N - 7Y-8245
E-1
CONN77
C
LL - 51-8375
Fine Swing Control Switch
F-7
CONN35
F - 5l-8216
N - 7Y-8245
F-1
CONN78
LL - 5l-8375
MM - 51-8374
F-9
CONN26
B
H - 5l-8215
Start Aid Switch
E-5
CONN61
B
H - 5l-8215
Fine Swing Control Switch
E-5
CONN22
B
J - 7V-3921
Lower Washer Switch
E-7
CONN61
B
H - 5l-8215
Low Idle Switch
E-5
CONN20
B
J - 7Y-3921
Hammer Control Switch
E-7
CONN60
C
K - 7Y-3868
Horn Switch
F-5
CONN37
S - 7Y-5508
Hammer Control Sol
D-5
1 Contacts
CONN70
RR - 105-9998
D - 7Y-8127
C-13
CONN68
U - 7Y-8105
Converter
E-12
*=Connector is located at the component.
4 Contacts
3 Contacts
2 Contacts
2 Contacts
2 Contacts
Bullet
Terminal
10 Contacts
7 Contacts
5 Contacts
4 Contacts
1
2
3
4
4
3
1
1
1
4
3
2
6
5
3
1
7
7
7
2
9
3
10
5
3
2
22
37
23
33
34
35
24
25
2
31
1
1
1
1
32
4
7
9
26
1
1
1
1
27
6
5
3
136
46
1
1
1
6
43
1
20
2
3
5
19
18
45
44
40
39
8
16
3
14
13
11
12
11
1
17
4
1
28
29
30
4
6
41
42
9
10
5
6
8
38
A
3
5
6
7
9
10
11
12
13
14
16
3
4
5
6
8
8
10
11
12
14
15
13
16
B
C
D
E
1
2
17
19
20
21
22
23
25
28
29
31
37
35
33
34
36
7
F
39
40
42
43
44
45
46
47
17
18
19
20
23
24
25
27
28
29
30
31
32
Machine Harness Connector And Component Locations
A
3
5
6
7
40
9
10
11
12
13
39
14
16
3
4
5
8
9
10
11
12
14
15
13
16
B
C
D
E
1
2
17
19
20
21
22
23
25
27
28
29
31
37
35
33
34
36
7
F
40
43
44
45
46
47
17
18
19
20
38
22
23
24
46
43
28
29
41
31
32
41
42
34
33
40
37
35
36
46
H
G
46
46
13
44
45
38
39
43
46
47
43
9
9
3
46
42
39
46
33
42
25
34
36
H
35
37
G
26
30
27
44
45
2
3
4
3
4
1
2
1
2
3
4
5
6
7
8
9
3
4
6
8
9
10
1
2
7
AREA A
AREA B
1
2
3
4
5
3
4
5
6
8
9
1
7
1
3
4
5
6
7
8
9
10
3
4
5
6
1
2
7
AREA C
AREA D
1
2
3
3
1
1
2
3
4
6
1
2
3
4
5
6
3
4
5
1
2
1
3
AREA F
AREA H
AREA G
AREA E
SENR6240
June 1994
330 & 330L Excavators
Electrical System
330:
8RL1-UP
2ZM1-UP
330L:
9ML1-UP
5YM1-UP
©
1994 Caterpillar
All Rights Reserved
Printed in U.S.A.
7Y-5571 NOTE M
A
C
D
E
F
12345
2345678
9
10
671015 14 12 11
1112131415
200-BK
575-YL
152-BU
576-PK
2
4
1
3
200-BK
576-PK
575-YL
152-BU
578-BU
200-BK
616-BU
200-BK
615-YL
501-GN
500-BR
410-WH
200-BK
403-GN
113-OR
B956-PK
129-BU
200-BK
118-GY
2
306-GN
200-BK
307-OR
B734-GY
200-BK
322-GY
616-BU
200-BK
200-BK
616-BU
200-BK
200-BK
129-BU
403-GN
410-WH
113-OR
B955-YL
201-BK
1
B955-YL
4
3
B956-PK
113-OR
118-GY
200-BK
500-BR
501-GN
200-BK
501-GN
500-BR
118-GY
200-BK
200-BK
615-YL
615-YL
615-YL
200-BK
200-BK
615-YL
365-YL
235-BK
RELAY PANEL
RELAY PANEL
152-BU
4
3
7
101-RD-6
101-RD-14
101-RD-14
607-PK
616-BU
322-GY
791-PK
786-GN
A983-BU
792-OR
184-BU
322-GY
320-OR
114-GN
114-GN
506-PU
142-BU-14
113-OR
121-YL
112-PU-14
112-PU-14
101-RD-14
147-PU
124-GN-14
129-BU
185-YL
105-BR
607-PK607-PK
616-BU
322-GY
200-BK
615-YL
501-GN
500-BR
120-YL
118-GY
103-YL
320-OR
185-YL
147-PU
129-BU
124-GN-14
105-BR
306-GN
308-YL
109-OR-6
109-OR-6
101-RD-6
304-WH-8
200-BK
200-BK-6
200-BK
235-BK
235-BK
235-BK
235-BK
A983-BU
792-OR
791-PK
786-GN
6
5
1
2
5
10
2
1
6
9
8
7
4
3
10
1
6
3
9
8
7
2
5
4
184-BU
109-OR-6
101-RD-14
101-RD-14
101-RD-6
112-PU-6
112-PU-14
112-PU-14
112-PU-14
112-PU-14
112-PU-14
501-GN
118-GY
791-PK
115-PK
115-PK
501-GN
118-GY
118-GY
792-OR
500-BR
142-BU-14
113-OR
120-YL
149-PU
115-PK
112-PU-14
112-PU-14
109-OR-6 112-PU-6
308-YL
200-BK
200-BK
616-BU149-PU
786-GN149-PU
506-PU118-GY
118-GY
120-YL
607-PK
615-YL
615-YL
A983-BU
112-PU-14
101-RD-14
152-BU
118-GY
121-YL
184-BU
103-YL
114-GN
306-GN
200-BK
304-WH-8
OPERATOR STATION
310-PU
578-BU
519-PK
200-BK
578-BU
B957-GN
168-GN-14
B957-GN
323-WH-14
200-BK
200-BK
200-BK
200-BK
200-BK
265-BK
109-OR-6
113-OR
A762-PU
788-YL
492-GY
405-GY
326-PU
403-GN
200-BK
513-OR
311-WH
8
10
7
6
9
1
3
4
2
5
830-OR
828-WH
200-BK
200-BK
828-WH
200-BK-6
147-PU
124-GN
A537-PK
B747-PU
B747-PU
147-PU
A537-PK
124-GN
B747-PU
200-BK
A537-PK
147-PU
A537-PK
B747-PU
124-GN
200-BK
1
4
3
5
2
200-BK
135-BU
1
2
B786-BU
200-BK
3
326-PU
200-BK-14
103-YL
615-YL
519-PK
103-YL
4
200-BK
578-BU
152-BU
575-YL
152-BU
576-PK
586-BR
147-PU
101-RD-6
RD-00RD-00
578-BU
616-BU
200-BK
1
103-YL
168-GN-14
168-GN-14
168-GN-14
122-BU
120-YL
RELAY PANEL
5
310-PU
B786-BU
1
326-PU
2
4
3
7
6
5
1
B790-OR
B790-OR
B789-BR
B789-BR
B789-BR
B790-OR
5
200-BK
122-BU
103-YL
500-BR
B730-OR
BK-00
501-GN
1
2
B731-WH
200-BK
B730-OR
830-OR
185-YL
B751-YL
A763-GY
B789-BR
B789-BR
B739-WH
B790-OR
A769-GY
A768-BU
B790-OR
B740-OR
185-YL
A768-BU
2
519-PK
122-BU
2
1
B956-PK
B955-YL
615-YL
6
122-BU
122-BU
120-YL
121-YL
2
5
3
4
1 124-GN-14
118-GY
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
615-YL
B956-PK
500-BR
B955-YL
501-GN
A768-BU
763-BU
118-GY
B964-YL
A769-GY
A769-GY
A768-BU
763-BU
142-BU
142-BU
5
142-BU
142-BU
142-BU
142-BU
B964-YL
142-BU-14
4
8
7
403-GN
129-BU
113-OR
1
3
10
200-BK-14
RD-00
304-WH-8
410-WH
200-BK-6
9
113-OR
A769-GY
RD-00
RD
576-PK
575-YL
578-BU
152-BU
152-BU
586-BR
147-PU
A768-BU
185-YL
B740-OR
B790-OR
B739-WH
B789-BR
B751-YL
A763-GY
200-BK
4
1
2
5
10
BK-00
8
9
F
E
D
13
6
C
200-BK
7
403-GN
788-YL
A762-PU
513-OR
311-WH
3
2
1
113-OR
113-OR
492-GY
200-BK A761-PU
B751-YL
A763-GY
2
1
3
101-RD-6
304-WH-8
101-RD-6
304-WH-8
B
5
405-GY
A769-GY
4
828-WH
A770-PK
830-OR
2
1
B731-WH
185-YL
A770-PK
2
1
2
1
828-WH
185-YL
B731-WH
B964-YL
B965-GY
B751-YL
A769-GY
A768-BU
A770-PK
763-BU
491-PK
113-OR
A762-PU
788-YL
492-GY
405-GY
142-BU-14
B730-OR
506-PU
495-GN
321-BR
109-OR-6
A771-PU
A763-GY
200-BK
513-OR
519-PK
513-OR
2
3
1
200-BK
405-GY
109-OR-6
326-PU
2
200-BK
200-BK
200-BK
200-BK
311-WH
200-BK
109-OR-6
200-BK-6
200-BK
492-GY
113-OR
A768-BU
506-PU
495-GN
321-BR
121-YL
513-OR
311-WH
A771-PU
311-WH
321-BR
121-YL
321-BR
121-YL
168-GN-14
266-BK
200-BK
506-PU
200-BK 495-GN
A761-PU
506-PU
513-OR
A758-BR
A757-GY
A756-BU
A755-PK
308-YL
310-PU
105-BR
307-OR
326-PU
308-YL
308-YL
D760-YLD760-YL
308-YL
326-PU
105-BR
A758-BR
A757-GY
A756-BU
A755-PK
310-PU
307-OR
200-BK
200-BK
200-BK200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
320-OR
200-BK
3
2
4
5
1
200-BK
200-BK
D760-YL
4
3
2
1
2
BK
200-BK
10
1
9
8
7
2
3
6
4
1
2
519-PK
124-GN-14
200-BK
320-OR
200-BK
615-YL
495-GN
3
1
2
200-BK-14
200-BK
B734-GY
306-GN
124-GN-14
615-YL
B956-PK
B955-YL
501-GN
500-BR
410-WH
403-GN
129-BU
120-YL
118-GY
113-OR
103-YL
B731-WH
B730-OR
A769-GY
A768-BU
185-YL
147-PU
B789-BR
B751-YL
B740-OR
B739-WH
A763-GY
586-BR
152-BU
B790-OR
320-OR
B786-BU
A758-BR
A757-GY
A756-BU
A755-PK
326-PU
A
308-YL
105-BR
200-BK
D760-YL
615-YL
235-BK
RADIO FOR JAPAN
1
2
B747-PU
200-BK
200-BK
D760-YL
A983-BU
792-OR
791-PK
786-GN
235-BK
184-BU
235-BK
B956-PK
B955-YL
B790-OR
B789-BR
B786-BU
B739-WH
B740-OR
B731-WH
B730-OR
A758-BR
A757-GY
A756-BU
A755-PK
410-WH
308-YL
B734-GY
B964-YL
B965-GY
A771-PU
A762-PU
A761-PU
788-YL
763-BU
495-GN
492-GY
491-PK
405-GY
403-GN
321-BR
403-GN
2
3
4
1
301-BU-14
B965-GY
ATCH RADIO FOR OUTSIDE JAPAN
B965-GY
A762-PU
788-YL
513-OR
311-WH
113-OR
BK-00
492-GY
A762-PU
788-YL
200-BK
RD-00
200-BK-14
405-GY
RD-00
200-BK
D760-YL
B786-BU
607-PK
200-BK
200-BK
200-BK
322-GY
616-BU
109-OR-6
101-RD-6
304-WH-8
403-GN
2
1B747-PU
B964-YL
B965-GY
A771-PU
A762-PU
A761-PU
788-YL
763-BU
495-GN
492-GY
491-PK
405-GY
321-BR
403-GN
304-WH-8
101-RD-6
109-OR-6
506-PU
142-BU-14
121-YL
A769-GY
A763-GY
B751-YL
326-PU
A768-BU
B747-PU
491-PK
B747-PU
A769-GY
A768-BU
325-PK
763-BU
200-BK-14
365-YL
325-PK
323-WH-14
200-BK-14
1
2
1
2
365-YL
323-WH-14
365-YL
323-WH-14
365-YL
323-WH-14
323-WH-14
365-YL
365-YL
323-WH-14
200-BK
D761-GN
200-BK
D761-GN
113-OR
2
1
615-YL
501-GN
500-BR
120-YL
118-GY
152-BU
103-YL
320-OR
185-YL
147-PU
129-BU
124-GN-14
105-BR
306-GN
308-YL
B956-PK
B955-YL
B790-OR
B789-BR
B786-BU
B740-OR
B739-WH
B734-GY
B731-WH
B730-OR
A758-BR
A757-GY
A756-BU
A755-PK
A768-BU
410-WH
501-GN
500-BR
410-WH
120-YL
118-GY
152-BU
113-OR
320-OR
308-YL
306-GN
185-YL
147-PU
129-BU
124-GN-14
105-BR
103-YL
B786-BU
B740-OR
B739-WH
B734-GY
B731-WH
B730-OR
403-GN
B751-YL
A769-GY
A768-BU
A763-GY
326-PU
200-BK
586-BR
200-BK
586-BR
A758-BR
A757-GY
A756-BU
A755-PK
B790-OR
B789-BR
9
8
10
7
2
1
6
5
4
3
10
6
5
4
3
9
8
7
2
1
10
9
8
7
2
1
6
5
4
3
10
9
8
2
1
6
5
B965-GY
B964-YL
830-OR
1
6
200-BK
310-PU
311-WH
1
2
D761-GN
506-PU
142-BU-14
121-YL
113-OR
147-PU
9
7
200-BK
5
4
323-WH-14
3
1
10
365-YL 2
109-OR-8
8
200-BK
200-BK
322-GY
322-GY
200-BK
200-BK
D761-GN
147-PU
D761-GN
147-PU
147-PU
147-PU
D761-GN
D760-YL
118-GY 501-GN118-GY
D760-YL
500-BR
D760-YL
D760-YL
D760-YL
200-BK
266-BK
B747-PU
200-BK
BK-00
200-BK2
1 B747-PU
B747-PU
491-PK
200-BK
B747-PU
B747-PU
7
6
4
2
1
D764-GN
D764-GN
D764-GN
109-OR-8
200-BK 2
1D764-GN
210-BK
7
4
2
3
9
8
1
B
ATCH LOWER
WIPER MOTOR
4I-5019
A
+
S +1
-
MOTOR
R
A A
E
E
G
N N
NN
P
P
A
F
G
CAB
E
E
F
F
L2
L1
MOTOR
-
+1
S
+
OPERATOR STATION
OPERATOR STATION
ATCH
AUX HYD
PRESS SW
4I-5387
ATCH
CAB LAMP
5I-8250
CIGAR
LIGHTER
9W-0335
HORN
7Y-3919 NOTE M
ACTION ALARM
3E-6328
INSTRUMENT
PANEL
7Y-5500
SERVICE
METER
6T-7337
ATCH
CAB LAMP
5I-8250
WIPER MOTOR
4I-6838
NEUTRAL START
AID SWITCH
9W-2150
BOOM LAMP
5I-8250
L3
2
1
2
1
+
-
GND
+BATTERY
2
1
1
2
2
1
PLATFORM
ATCH REFUELING
PUMP RELAY
7Y-5490
20A
M
M
MM
L13
L16
L29
L29
L25
L27
L30
L25
L29
L28
L27
HAMMER
A/C /HEATER
CIGAR LIGHTER
BACK UP
L25
HORN RELAY
7Y-5490
L27
KEY SWITCH
10A
20A
10A
15A
10A
10A
L10
L11
L13
L27
L26
L28
L28
L28
L26
15A10A
WW
WW
L30
ALT BREAKER
9S-0174
L30
CHASSIS/CAB LIGHT
RELAY
7Y-5490
WIPER RELAY
7Y-5490
L26
SOLENOID
MONITOR
RADIO
BOOM LAMP
CHASSIS/CAB LAMP
VV
MAIN RELAY
3T-0376
L26
VV
BOOM LAMP RELAY
7Y-5490
WASHER RELAY
7Y-5490
ATCH WIPER/WASHER
WIPER/WASHER
TRAVEL ALARM
E/P CONT
DOME LAMP
HORN
10A
10A
10A
10A
10A
10A
START RELAY
9X-8124
10A
10A
15A
10A
10A
10A
SPEAKER 7Y-5505
200-BK
103-YL
122-BU
615-YL
509-WH
508-PU
T
SPEAKER (-)
511-BR
512-GN
F
T
ATCH
ANTENNA
106-0036
3
1
4
2
ILLUMI (+)
ACC (+)
SPEAKER (+)
GND
BACK UP
SPEAKER (-)
SPEAKER (+)
AM/FM RADIO
7Y-5437
AM RADIO
7Y-5433
SPEAKER 7Y-5505(NOTE J)
19
NOTE G: USE WITH ATCH-REFUELING PUMP
(NOTE G)
(NOTE G)
(NOTE G)
(NOTE G)
(NOTE G)
ATCH
MAIN RELAY
3T-0376
(NOTE G)
(NOTE G)
L4
MOTOR
C
(NOTE G)
(NOTE G)
(NOTE F)
(NOTE G)
TRAVEL SW (RIGHT)
TT TT
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR
RR RR
RR
RR
RR
RR
RRRRRR
RRRRRR
RR
RR
RR
RR
NOTE C: USE WITH MODEL X220,X221
L4
ATCH
LOWER
WASHER
MOTOR
7T-8890
C
LL
TT
TT 111-4744 B-4 (NOTE G)
(NOTE G)
NOTE F: USE 20A AT ATCH-REFUELING PUMP
RR
RR RRRRRR
RR
TRVEL SW (LEFT)
RR 105-9998 D-3
RR
A
A
TRAVEL
PRESS SW
(LEFT)
4I-5387
2
1
1
2
TRAVEL
PRESS SW
(RIGHT)
4I-5387
1
2
33
2
A
1
MM
MM
PLATFORM
MM 5I-8374 E-6 (NOTE C)
LL 5I-8375 F-7 (NOTE C)
ATCH
FINE SWING
CONT SW
7X-6386
1
2
ENGINE
SHUTDOWN SOL
3E-7985
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 330 EXCAVATOR
HH 7Y-5507 A-3 (NOTE A)
GG 7Y-3946 A-2 (NOTE A)
FF 111-4737 A-2 (NOTE A)
EE 7Y-8132 B-14
DD 105-9947 A-3
CC 105-9940 A-3
BB 7Y-3946 A-2
AA 7Y-8131 A-2
CABLE AS.
VV 111-4711 B-7
WIRE AS.
T 7Y-8139 E-11
S 7Y-5508 D-5
R 7Y-8106 C-2
D
D
CHASSIS
DD
AA
FF
EE
CHASSIS
C
S S
M
MM
R
CCCC BB AA
DD
HH
HH GG
FF
P 7Y-3988 D-3
N 7Y-8245 E-1
M 111-4720 B-4
L 102-7902 F-9
K 7Y-3868 F-6
J 7Y-3921 E-9
H 5I-8215 E-6
G 5I-8217 E-1
F 5I-8216 E-10
E 111-4712 E-10
D 7Y-8127 C-15
C 105-9930 D-12
A 106-0025 D-4 (NOTE M)
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
HARNESS AS.
C
C
D
D
D
D
D
C
C
C
A A A A A
CHASSIS
BK-00 BK-OO
ATCH
BOOM LAMP
5I-8250
POS
NEGNEG
POS
BATTERY
3T-5760
L16
L15
L12
L14
L17
L12
L11
L13
L12
L11
L14
L16
L15
L12
L14
L17L17
L10
(NOTE G)
(NOTE G)
A
A
A
OPERATOR STATIONOPERATOR STATION
A
ATCH
START AID SOL
9G-4365
11
15
2
HYD OIL LEVEL SW
BOOM RAISE PRESS SW
OPTION SOLENOID
13
5
4
16
9
10
SWING POWER CHANGE SOLENOID
COOLANT LEVEL SW
ENGINE OIL LEVEL SW
OPTION SENSOR
OPTION SW 1
HYD OIL TEMP SENSOR (ANLG)
10
11
4
3
26
16
15
23
31
21
18
17
OPTION RELAY 3
OPTION RELAY 2
OPTION RELAY 1
GLOW
RS232C RxD
RS232C TxD
PWM OUT -
PWM OUT +
CHASSIS
LAMP
5I-8251
(NOTE C)
1
2
28
ATCH
START AID
COOLANT TEMP SW
8C-3569
ENG OIL
PRESS SW
9X-4276
ALTERNATOR
100-5047
ATCH
A/C COMPR
CLUTCH SOL
7T-8600 NOTE M
COOLANT TEMP
SENSOR
3E-5370
ATCH NOTE M
REFRIGERANT
LOW PRESS. SW
5I-3959
STARTER
MOTOR
6V-5227
ENGINE SPEED
SENSOR
3E-7886
FUEL
LEVEL
SENSOR
7Y-3848 NOTE M
WASHER
MOTOR
7T-8890
IMPLEMENT
PRESS SW
102-8041
ATCH HAMMER
CONT SOL
7Y-5005
A
HORN
7Y-3920 NOTE M
PP
HYD OIL TEMP
SENSOR
4I-5394
WASHER RELAY
WIPER MOTOR RELAY
CHASISS LAMP RELAY
BOOM LAMP RELAY
GND
BACKUP SW1
HARNESS CODE 2
HARNESS CODE 3
HARNESS CODE 4
HARNESS CODE 1
RS485 -
RS485 +
BACKUP SW2
LOW IDOL SW
G/A -
G/A +
+B (24V)
GND
SWING BRAKE SW
ENG SPEED SENSOR -
G/A SENSOR
ENG SPEED SENSOR +
TRAVEL SOLENOID
FUEL LEVEL SENSOR
COOLANT SENSOR
HYD OIL TEMP SENSOR (PWM)
ENGIN OIL SW
ALTERNATOR (R TERM)
TRAVEL ALARM
LEVEL FINISH SOL.
TRENCHING SOL.
PROPORTIONAL
REDUCING VALVE
5I-8368
(NOTE G)
TRAVEL SPEED
SOL
7I-1245
LL
L
L
ATCH
GROUND STRAP
7G-1060 (NOTE B)
2
1
2
1
T
R
ALT
+
GROUND
SIGNAL
+B
C
B
A
A
2
1
A L
A
(NOTE G)
2
1
MOTOR
2
1
H
L18
UU 5I-8376 D-11 (NOTE J)
ATCH
SEAT WITH
SEAT HEATER
100-7729
100-7678 (NOTE H)
A
CHASSIS
1
2
2
1
ATCH
SEAT HEATER SW
7X-6386
ATCH
CREEPER SPEED
CONT SW
7X-6386
1
2
L
L
A
ATCH
A/C UNIT
4I-0470
1
H
H
H
J
J
J
J
CONVERTER
7T-8000
U
TO RADIO
ANTENNA
106-0036
U
L4
L6
L4
L7
L8
L3
L8
L3
L4
L8
DOME LAMP
096-0721
J
J
A
A
CAB
PLATFORMCHASSIS
CHASSIS
T
PLATFORM
HEATER
UNIT
4I-1275
E
F
A
AC
K
HA
A
A
L6
L7
L8
L9
L5
L1
L7
L5
L3
L6
L7
L5
L2
L6
L2
L6
L1
L5
L7
L6
L7
L6
L8
L9
L5
L2
L2
L1
L1
L3
OPERATOR STATION OPERATOR STATIONOPERATOR STATION
SIG 4
SIG 3
SIG 2
SIG 1
COM
F
2
1
3
2
1
J
J
J
1
2
ATCH HAMMER
CONT SW
7X-6386
ATCH LOWER
WASHER SW
7X-6387
ATCH LOWER
WIPER SW
7X-6388
L4
L3
HORN SW
6I-5088
STARTER
KEY SWITCH
9G-7641
ENGINE
SPEED DIAL
7Y-5465
ATCH START
AID SW
7X-6387
UU
UU
AA
6
4
3
1
5
2
SPEED
CHANGE SW
7N-8008
U
U
GROUND
+12 VOLT
GROUND
+ BATTERY
1
2
3
WH/BK-18
WH/RD-18
1
2
UU
UU
NOTE J: USE WITH AM/FM RADIO
ONE TOUCH
LOW IDLE SW
6I-5088
4
6
1
3
5
2
BACKUP
GOV SW
3T-4405
L
T
4
6
1
3
5
2
10
1
2
3
4
9
6
R
C
S
B
OFF
ON
ST
L8
L9
2
3
BACKUP
RESISTOR
102-8016
PUMP
BACKUP SW
3T-4405
8
L1
BK-18
RD-18
GROUND STRAP
7G-1060
7
5
L9
MM
L16
L15
L12
L14
25
35
14
24
5
1
2
BACKUP SW3
L21
L12
L15
EPR SOLENOID +
EPR SOLENOID -
ACCELERATOR 5
ACCELERATOR 4
ACCELERATOR 3
ACCELERATOR 2
MONITOR ALARM
KEY SW
ATTACHMENT
TRENCHING
SOL
7I-1247
LEVEL FINISH
SOL
7I-1246
L16
L14
22
12
33
32
40
30
19
20
34
36
6
7
8
9
29
39
38
37
20
7
8
17
12
21
6
1
22
23
24
18
3
14
2
1
POS
NEG
NEG
POS
ATCH
BATTERY
3T-5760
(NOTE A)
NOTE A: USE WITH COLD WEATHER
DISCONNECT
SWITCH
7N-0718
7N-0719 (NOTE A)
YL
BU
GOV ACTR
106-0097 NOTE K
PU
BK
SIG
GND
OR 24V+
M
SIG
GND
5V+
H
NOTE H: USE WITH WIDE WIDTH CAB
XX
ATCH
CREEPER SPEED
CONT SOL
7I-8190
ATCH
CREEPER SPEED
CONT SOL
7I-8190
L21
W
ATCH
REFUELING SW
5C-6108
W
W
ATCH
TRAVEL ALARM
3T-1444
ATCH
REFUELING
PUMP
6C-5572
ATCH
REFUELING
PUMP SW
7Y-8263
C
MOTOR
C
W
1
2
C
ATCH FINE
SWING SOL
7I-0124
(NOTE C)
V
V
2
1
2
1
FINE SWING
NOTE
ATCH FINE
SWING RELAY
7Y-5490
(NOTE C)
TT
TTTT
L15
M
W 105-9934 E-12 (NOTE G)
V 5I-8284 C-6 (NOTE C)
ATCH
STARTER
MOTOR
3T-8946
(NOTE A)
27
X
Z
Y
3
5
XX
XX
XX 111-4710 B-4
SS 106-0026 F-8
PP 106-0027 F-8
ENGINE/PUMP
CONTROLLER
102-8010 NOTE M
13
BOOM RAISE
PRESS SW
102-8042 NOTE M
MOTOR
Z 7Y-8123 F-4 (NOTE B)
Y 111-4724 D-5 (NOTE B)
BLOCK AS.
7Y-5499
10
9
8
U 7Y-8105 E-12
WW 111-4709 B-9
REFUELING PUMP
D
D
X 5I-8345 A-12
CAB RISER
FRAME
(NOTE B)
265-BK
L24
L24
L18
L19
L20
L20
L18
L19
L20
L19
L18
L22
L22
L19
L17
TT
NOTE B: USE WITH CAB RISER
TT
NOTE K: USE WITH SERIAL NUMBERS 2ZM1-UP AND 5YM1-UP
NOTE M: USE WITH SERIAL NUMBERS 8RL1-UP AND 9ML1-UP
YY 116-8179 F-15 (NOTE K)
A 114-5518 D-4 (NOTE K)
CONN 5
CONN 6
CONN 38
7T-0970 NOTE K
7T-0969 NOTE K
CONN 32
CONN 82
CONN 51
CONN 33
CONN 29
CONN 34
CONN 30
CONN 31
CONN 28
CONN 10 CONN 11
CONN 9
CONN 8
CONN 7
CONN 37
CONN 60
CONN 23
CONN 24
CONN 25
CONN 27
CONN 26
CONN 61
CONN 63CONN 62
CONN 4
CONN 3
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 75
CONN 76
CONN 77
CONN 20
CONN 21
CONN 22
CONN 18
CONN 19
CONN 80
CONN 17
CONN 78
CONN 15
NOTE M
CONN 71
CONN 14
CONN 13
CONN 12
NOTE M
CONN 15
1
4
3
5
2 2
5
3
4
1
A
ATCH
A/C UNIT
107-1994
HEATER
UNIT
107-1995
A
NOTE K
NOTE K
CONN 84
CONN 79
CONN 12
CONN 68
CONN 69
CONN 44
CONN 1
106-0134 NOTE K
CONN 2
CONN 70
CONN 43
CONN 52
CONN 59
106-0096 NOTE K
CONN 73
CONN 74
CONN 47
CONN 46
CONN 40
102-0347 NOTE K
CONN 50
CONN 45
CONN 66
105-9993 NOTE K
CONN 49
CONN 48
CONN 39
CONN 65
1
519-PK
513-OR
2
YY
NOTE K
ATCH REFRIGERANT SW
114-5334
1
2
C
CONN 39
YY
CONN 41
CONN 42
CONN 64
CONN 72
CONN 56
CONN 55
CONN 54
CONN 53
CONN 58
CONN 83
CONN 35
CONN 36