416B, 426B, 428B, 436B AND 438B BACKHOE LOADERS (EUROPEAN CAB) ELECTRICAL SYSTEM SCHEMATIC

Component Location
Component
Schematic
Location
Machine
Location
Component
Schematic
Location
Machine
Location
Alarm - Backup B-9 1 Solenoid - Air Conditioner Clutch D-1 12
Alarm - Action D-5 A Solenoid - Bucket Positioner A-4 13
Alternator B-1 2 Solenoid - Engine Shutdown D-2 14
Batteries F-5 3 Solenoid - Front Drive B-2 15
Breaker - Running Lamp B-8 C Solenoid - Lift C-2 19
Coil - Start Aid B-2 7 Solenoid - Sideshift Lock C-9 1
Diode As. D-5 D Solenoid - Tilt D-1 21
Flasher C-7 D Solenoid - Transmission Neutralizer C-2 18E
Fuse - Holders C-9, E-5 C Switch - Backup Alarm/Parking Brake C-2 17E
Gauge - Converter Temperature D-8 B Switch - Beacon D-7 B
Gauge - Coolant Temperature D-8 B Switch - Blower (A/C) E-5 A
Gauge - Fuel D-9 B Switch - Blower (Heater) D-4 A
Gauge - Tachometer D-9 B Switch - Brake Fluid Level C-4 27
Horn - Forward A-1 4 Switch - Coolant Temperature D-2 20
Horn - Rear B-9 1 Switch - Dimmer D-5 A
Meter - Service D-8 B Switch - Engine Oil Pressure D-2 22
Meter - Volt D-8 B Switch - Forward Horn C-3 A
Motor - Blower (A/C) E-5 A Switch - Front Drive C-3 A
Motor - Blower (Heater) C-4 A Switch - Front Wiper C-6 B
Motor - Fan E-7 A Switch - Front Flood E-7 B
Motor - Front Wiper E-3 A Switch - Head Lamp/Front Flood D-6 B
Motor - Rear Wiper (Lower) E-8 A Switch - Key Start C-7 B
Motor - Rear Wiper (Upper) E-9 A Switch - Loader Lock C-5 13
Motor - Starter E-2 5 Switch - Neutral/Start C-2 23
Motor - Windshield Washer F-3 6 Switch - Parking Brake D-5 A
Relay - ACC C-7 C Switch - Rear Flood Lamp E-7 B
Relay - A/C B-9 C Switch - Rear Horn D-8 A
Relay - Cab C-9 C Switch - Rear Lower Wiper E-6 B
Relay - Lamp Check B-7 C Switch - Rear Upper Wiper C-6 B
Relay - Loader Lock C-7 C Switch - Refrigerant F-1 26
Relay - Main C-8 C Switch - Return To Dig D-1 21
Relay - Start B-8 C Switch - Running Lamp D-6 B
Resistor - Alternator Field C-7 C Switch - Side Lock B-9 A
Resistor - Blower Motor Speed (A/C) E-5 A Switch - Start Aid D-7 B
Resistor - Blower Motor Speed (Heater) D- 4 A Switch - Thermostat D-5 A
Sender - Converter B-2 8 Switch - Turn Signal/Hazard E-3 A
Sender - Coolant Temperature C-1 9 Switches - Brake (Stop Light) D-4, E-4 27D
Sender - Fuel A-6 10 Switches - Transmission Neutralizer B-6,C-S A
A = Components in operator compartment.
B = Components in operator compartment - Right console.
C = Components on relay panel (inside right console).
D = Components in front console/dash.
E = Components in operator compartment - under floor plate.
Connectors
Machine
Location
Harness And/Or
Components
Schematic
Location
Connectors
Machine
Location
Harness And/Or
Components
Schematic
Location
C
E - 9R-8633
H - 9R-8623
B-7 C
E - 9R-8633
H - 9R-8623
B-8
C
E - 9R-8633
H - 9R-8623
B-8
E - 9R-8633
KK - 9R-9568
A-9
E
D - 9R-8621
E - 9R-8633
B-4
E - 9R-8633
KK - 9R-9568
F-9
*
E - 9R-8633
Diode As.
D-5
D
E - 9R-8633
L - 9R-8624
E-4
C
A -9R-9554
K -9R-9555
B-7
*
A - 9R-9554
Front Wiper Motor
D-3
*
A - 9R-9554
Rear Wiper Motor (Upper)
E-9
C
B - 9R-8620
E - 9R-8633
A-8
D
E - 9R-8633
F - 9R-8626
E-2
E
E - 9R-8633
G - 9R-8843
A-4
*
E - 9R-8633
Turn/Hazard Switch
E-3
*
F-9R-8626
Head/Position Turn Lamp
A-2,F-2
* = Connector is located at the component.
C = Connector is in right console.
D = Connector is in front console/dash.
E = Connector is in operator compartment - under floor plate.
Connector Location
12 Contacts
8 Contacts
6 Contacts
4 Contacts
Part No. Component Description Resistance (Ohms)¹
8C4110 Resistor - Alternator 22 ± 1.1
7T3828 Resistor - Blower Motor Speed Overall 1.0 ± .1; Tap 0.5 ± .05
3E7703 Solenoid - A/C Clutch 3.5 ± 0.15
3E8620 Solenoid - Bucket Positioner 21.8 ± 1.0
3E7507 Solenoid - Front Drive/Trans Neutralizer 7.7 ± .77
3E8621 Solenoid - Sideshift Lock 10.5
¹ At room temperature.
Off Machine Switch Specification
Part No. Function Actuate Deactuate Contact Position
6T2665 Coolant Temperature
107.2 ± 2.8°C
(225 ± 5°F)
93°C MIN
(196°F MIN)
Normally
Closed
9D6888 Refrigerant Pressure
234 kPa MAX
(34 psi MAX)
152 kPa MIN
(22 psi MIN)
Normally
Open
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Circuits
Monitoring Circuits (Cont'd)
101 RD BAT 447 PK FUEL LEVEL GAGE
102 BU HD LMP 450 YL TACH SENDER (+)
103 YL AUX CKT 483 BR BRAKE FLUID LEVEL
105 BR KEY SW
109 OR ALT OUTPUT (+) TERM. 500 BR WIPER - FRONT (PARK)
112 PU MAIN POWER RELAY OUTPUT 501 GN WIPER - FRONT (LO)
113 OR OPR MON PANEL B+ SWITCHED 502 OR WIPER - FRONT (HI)
116 BR AUX CKT 503 BR WIPER - REAR (PARK)
118 GY AUX CKT 504 YL WIPER - REAR (LO)
119 PK AUX CKT 505 BU WIPER - REAR (HI)
120 YL AUX CKT 506 PU WASHER FRONT
121 YL BACKUP ALARM TO LAMP 513 OR
A/C COMPRESSOR/REFRIGERANT
PRESS. SW
122 BU AUX CKT 515 GY BLOWER MOTOR (HI)
123 WH AUX CKT 516 GN BLOWER MOTOR (MEDIUM)
124 GN A/C 517 BU BLOWER MOTOR (LO)
126 PK XMSN CONT 520 WH OPR A/C SW TO THERMOSTAT/FUSE
128 PK AUX CKT 521 YL A/C SW TO REFRIGERANT SW
143 BR AUX CKT 522 WH A/C CLUTCH TO THERMOSTAT SW
157 YL AUX CKT 536 WH HAZARD SW TO TURN SW
161 PK AUX CKT 552 WH FOUR WHEEL DRIVE SOL
194 GN AUX CKT 568 GN WARNING BUZZER TO DIODES
Ground Circuits
576 PK WIPER - AUX (LO)
200 BK Main Chassis 577 PU WIPER - AUX (HI)
265 BK AUX A512 GN REAR INTERRUPT SW TO WIPER MOTOR
270 BK AUX
Basic Machine Circuits
603 PK ROTARY BEACON
303 BR KEY SW ACC POSITION 604 OR STOP LAMP
304 WH STARTER RELAY NO. I OUTPUT 605 YL TURN LAMP - LEFT
306 GN
STARTER RELAY COIL TO NEUT START SW OR
KEY SW
606 GY TURN LAMP - RIGHT
307 OR
KEY SW TO NEUT START SW OR VMIS SENSOR
MODULE
607 PK FLOOD LAMP - FRONT
308 YL MAIN POWER RELAY COIL 608 GN FLOOD LAMP - REAR
309 GY ALTERNATOR REGULATOR TERM. 610 OR HEAD LAMP BASIC
310 PU START AID SW TO START AID SOL 611 PU HEAD LAMP HI
321 BR BCKP ALARM LAMP TRAVEL ALARM 614 PU PARK/TAIL/DASH LAMP
322 GY WARNING HORN (FORWARD) 617 BR
TAIL/POSITION\LAMP - LEFT
(ROAD PKG)/WIDTH
367 BU WARNING HORN (REAR) 618 YL
TAIL/POSITION LAMP - RIGHT
(ROAD PKG)/WIDTH
372 GN STABILIZER LOCK VALVE RTN 619 GN HEAD LAMP LO
Monitoring Circuits
620 WH FLOOD LAMP - FRONT (ENG. FLOOD LAMP)
405 GY OPR MON OIL PRESS. (LO SETTING) 630 GY FLOOD LAMP REAR (ATTACH)
406 PU OPR MON COOLANT TEMP 634 WH
HEAD LAMP SW TO WORK/HEAD LAMP
JUMPER
415 GN OPR MON TEST SW
419 YL OPR MON PARKING BRAKE 737 GN SWITCHING GEAR CODE 5 FRONT
441 OR ENG COOLANT TEMP GAGE 762 YL BUCKET POSITIONER SOL SW
443 YL POWER TRAIN TEMP GAGE 766 GN XMSN DISCONNECT SOL
776 YL BRAKE RELEASE RELAY CONT
Accessory Circuits
Lighting Circuits
Control Circuits
A
1
2
3
3
4
5
6
8
9
10
12
14
15
13
B
C
D
2
17
18
19
20
21
22
23
26
27
7
A
1
2
3
3
4
5
6
8
9
10
12
14
15
13
B
C
D
1
2
17
18
19
20
21
22
23
26
27
7
Machine Harness Connector and Component Locations
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.
2
3
1
1
SENR5813
February 1993
416B, 426B, 428B, 436B and 438B
416B:
8SG1-UP
428B:
7EJ1-UP
438B:
3KK1-UP
426B:
5YJ1-UP
Backhoe Loaders with European Cab
Electrical System
426B:
6MJ1-UP
©
1993 Caterpillar
All Rights Reserved
Printed in U.S.A.
L45
6
5
4
3
2
1
6
5
4
1
2
A
3
2
1
2
1
6
5
4
3
1
2
1
2
2
4
3
2
1
C
B
A
2
1
2
1
B
A
C
6
1
2
12
11
10
9
1
2
3
5
4
2
4
3
1
4
3
8
7
2
6
5
4
1
3
2
1
12
11
10
9
8
7
6
5
4
3
2
1
B
2
C
B
A
1
C
1
2
1
2
1
4
B
E
JJ
SEND
S
S
BK-14
B
B
B
B
B
603-PK-16
L37
R
B
E
E
G G
E
617-BR
604-OR
200-BK
605-YL
STOP/TAIL
LAMP
9R-2385
NOTE E
EKK
2
1
4
3
YL
OR
BK-16
GY
200-BK
200-BK
618-YL
617-BR
620-WH
607-PK
608-GN
604-OR
GY
BK-16
OR
YL
3
4
1
2
KK E
A-9/F-9009R-9568KK
STOP/TAIL
LAMP
9R-2385
NOTE E
B
R
K
K
K
K
L22
L22
CC
CC
CC
CC
CC
CC
F
F
F
E
N/O
N/C
1
200-BK
304-WH
109-OR-4
406-PU
200-BK-10
200-BK
D
D
D
D
D
NOTE F: FOR ATCH FLOOD LAMPS, REMOVE COSA
HEADLAMP/FRONT FLOOD LAMP SW 3E-7269
NOTE E: USED AS STD ON 428B & 438B (NOT USED
ON 416B, 426B & 436B)
NOTE D: USED AS ATCH ON 416B, 426B & 436B
D
D
D
D
D
ATCH
D
ATCH
D
ATCH
ATCH
1
3
D
D
D
ATCH
D
BB
F
C
ATCH
E
D
D
D
5
ATCH
K
H
109-OR-4
NN
H
L35
L44
L52
L45
L52
R
L55
L54
JJ
L37
L52
E-7
L37
L56
L56
L56
L8
L56
L47
B
L32
E
H
01
L49
L49
L17
L32
L17
1V-1151
L49
L20
S
H
L22
L20
L9
L38
L38
109-OR-16
L38
L21
L38
NN
L38
L21
L38
L51
L8
L30
L40
F
F
L23
L8
L23
L37
L34
L35
L55
L45
H
L43
L34
L30
L30
L44
L30
L33
L29
L29
L26
L24
L25
E
L43
L25
E
E
E
E
E
E
G
L7
L6
L9
L26
L16
L16
L15
L15
L23
L12
L18
L45
L46
L43
109-OR-16
L46
MM
308-YL
L29
L11
L30
L1
L5
L57
L1
L36
L5
L30
L27
1
L28
3
4
E
200-BK
2
L25
L4
L9
L1
L1
L2
L4
L6
L11
L1
L5
1
L12
3
L4
4
L11
2
L7
6
200-BK
200-BK
200-BK
200-BK
200-BK
200-BK
737-BR BK-16
200-BK-16
1
SIDESHIFT
LOCK SOL
3E-8622
BK-16
PP
200-BK
2
PP
113-OR
737-BR
12
PP
SIDE
LOCK SW
3E-7270
JJHH
K
HH
LOWER REAR WIPER
119-PK
TILT SOL
VALVE GP
9T-5455
1
2
BK
BK
308-YL
270-BK
270-BK
308-YL
BK
BK1
2
270-BK
270-BK
LIFT SOL
VALVE GP
9T-5454
308-YL
308-YL
308-YL
270-BK
265-BK
270-BK
200-BK
WASHER
BOTTLE AS.
9R-9844
200-BK
506-PU
200-BK
MOTOR
LL
506-PU
506-PU
REAR HORN
7T-0635
367-BU
REAR
HORN SW
3T-2357
3
200-BK-16
200-BK
200-BK
200-BK
200-BK
200-BK-16
630-GY
603-PK
617-BR
620-WH
607-PK
200-BK-16
605-YL
608-GN
200-BK
200-BK
200-BK
200-BK
604-OR
TO LICENSE
LAMP
(UPPER)
618-YL
200-BK
617-BR-16
610-OR-16
605-YL
200-BK-16
606-GY
618-YL
200-BK-16
HIGH BEAM
IND LAMP
8M-6176
DIMMER SW
3E-7269
NOTE D
200-BK
611-PU
610-OR-16
CC
611-PU
619-GN
2 1
3
611-PU
611-PU
619-GN
610-OR-16
200-BK
606-GY
618-YL
200-BK
619-GN
611-PU
617-BR
610-OR-16
611-PU
619-GN
200-BK
605-YL
617-BR
606-GY
618-YL
610-OR-16
200-BK-16
605-YL
617-BR
HEAD/POSITION
TURN LAMP
3E-7584
HEAD/POSITION
TURN LAMP
3E-7584
619-GN RD
BK
BU
WH
L5
YL
606-GY
618-YL
611-PU
200-BK
L10
L1
L10
L7
L10
REAR UPPER
WIPER SW
3T-6655
2
B
H
L
P W
B
V
L
YL
F
WH
BU
BK
372-GN
321-BR
143-BR
143-BR
372-GN
E
321-BR
200-BK
D
113-OR
483-BR
483-BR
BRAKE FLUID
LEVEL IND LAMP
8L-9801
BK-00
L
BK-00
L
200-BK
1
415-GN
415-GN
405-GY
406-PU
415-GN
483-BR
CC
U U
RD619-GN
U
U
9R-9867
L54
L33
JJ
L33
200-BK
K
K
L44
H
L54
L53
L53
HH
L55
H
L53
200-BK
620-WH
L8
L9
L40
L8
L47
200-BK
L47
L40
L47
L48
L48
L51
L18
L4
L51
L31
618-YL
610-OR-16
617-BR
K
L46
L48
L36
L47
L48
MM
L48
NN
L45
L50
L44
L45
L42
L44
L42
L31
L50
NN
L32
L31
L43
L32
F-5
F-5
F-5
F-5
B-6/C-4
AA
RR
RR
MJ
L L
L
L
L
L
L
L
L
D
D
B
B
R
R
R
C
B
B
G
L24
D
D
D
D
F-9
D-1
C-4
D-6
E-6
B-6
H
H
H
H
H
H
H
H
H
E-4
B-7
109-OR-12
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H H
H
H
H
H
H
H
R
H
L
H
H
H
H
H
H
H
H
H
H
121-YL
112-PU-10
H
H
H
H
H
H
H
H
200-BK
200-BK
200-BK
441-OR
200-BK
200-BK
443-YL
200-BK
200-BK
200-BK
200-BK
441-OR
443-YL
447-PK
123-WH
568-GN
568-GN
568-GN
200-BK
123-WH
123-WH
123-WH
123-WH
419-YL
6
4
3
1
00
00
01
00
02
101-8461
101-4295
9R-7939
483-BR
7T-3550
9R-8625
9R-8624
9R-9555
9R-8623
9R-8843
9R-8633
9R-8621
9R-9536
9R-8620
JJ
HH
GG
CC
V
R
L
123-WH
483-BR
200-BK
BRAKE FLUID
LEVEL SW
4E-8619
BR
BK
200-BK
L57
113-OR
A
D
L10
L7
D-2
03
02
02
265-BK
200-BK
200-BK
200-BK
604-OR
604-OR
200-BK
308-YL
01
FRONT
FLOOD
LAMP SW
3E-7268
03
4
5
1
2
3
6
L37
02
304-WH-10
9R-7165
00
L1
120-YL-12
B
1
R
CC
9R-7981
B-4
R
CC
L19
L43
01
522-WH
520-WH-12
1
2
552-WH
322-GY
143-BR
405-GY
113-OR
483-BR
KK
614-PU
307-OR
200-BK
200-BK
200-BK
200-BK
161-PK
119-PK
9R-9540
200-BK
304-WH-10
START
RELAY
7X-1379
521-YL
522-WH
200-BK-12
120-YL-12
200-BK-12
614-PU
614-PU
634-WH-16
NN
MM
H
502-OR
500-BR
123-WH
762-YL
AA
02
L26
118-GY
501-GN
200-BK
200-BK-12
200-BK-12
605-YL
606-GY
DIODE AS.
2V-9473
DIODE AS.
2V-9473
405-GY
113-OR
536-WH
605-YL
606-GY
406-PU
419-YL
128-PK
605-YL
606-GY
RESISTOR
7T-3828
515-GY-12
BK-00
BK-00
516-GN-12
BK-16
406-PU
200-BK
GN-16
322-GY
RD-16
WH-16
419-YL
568-GN
321-BR
E
506-PU
200-BK
109-OR-4
322-GY
L55
200-BK
620-WH
200-BK
200-BK-10
200-BK
200-BK-10
502-OR
500-BR
200-BK
119-PK
200-BK
502-OR
501-GN
500-BR
504-YL
505-BU
119-PK
119-PK
118-GY
536-WH
200-BK
605-YL
128-PK
322-GY
102-BU
503-BR
LL
109-OR-12
LOADER LOCK
LIMIT SW
6T-5925
419-YL
LAMP
CHECK
RELAY
7X-1379
419-YL
L# CIRCUIT GROUPING
DESIGNATION
568-GN
522-WH
K
405-GY
116-BR-12
406-PU
122-BU-12
515-GY-12
118-GY
419-YL
200-BK-12
113-OR
517-BU-12
143-BR
606-GY
H
G
E
D
C
MOTOR
161-PK
161-PK
HEATER
BLOWER
SW
6P-3236
NOTE D
122-BU-12
200-BK-12
113-OR
310-PU-16
405-GY
113-OR
143-BR
536-WH
309-GY
450-YL
310-PU-16
441-OR
406-PU
308-YL
405-GY
419-YL
321-BR
121-YL
447-PK
128-PK
322-GY
200-BK-10
200-BK
447-PK
121-YL
109-OR-12
109-OR-10
109-OR-10
309-GY
450-YL
310-PU-16
603-PK
608-GN-16
303-BR
200-BK
05
450-YL
103-YL-10
441-OR
308-YL
200-BK-10
D
L1
D
L2
L11
L7
L27
D
L
D
119-PK
B
L43
308-YL
308-YL
308-YL
105-BR-16
415-GN
200-BK
ACC RELAY
7X-1379
200-BK
B
109-OR-10
306-GN
MAIN
RELAY
7X-1379
618-YL
L34
308-YL
L23
L31
L22
L42
H
308-YL-16
310-PU-16
310-PU-16
309-GY
614-PU
L5
L4
E
308-YL
2
200-BK-16
607-PK
620-WH
109-OR-10
161-PK-16
143-BR
200-BK
200-BK
308-YL
H
102-BU
102-BU-16
304-WH-10
109-OR-10
109-OR-10
109-OR-10
109-OR-10
E
H
506-PU
620-WH-16
610-OR-16
607-PK-16
603-PK
608-GN-16
630-GY-16
441-OR
443-YL
447-PK
B
450-YL
L15
U
ATCH
310-PU-16
309-GY
200-BK-16
536-WH-16
161-PK-16
307-OR
ATCH
415-GN
308-YL
306-GN
121-YL
128-PK
113-OR
143-BR
126-PK
618-YL
143-BR
415-GN
H
H
103-YL-16109-OR-16
L54
A
L19
L21
M
116-BR-16
2
BB
4
116-BR-16
H
200-BK-12
102-BU-16
L17
102-BU-16
J
157-YL
610-OR-16
200-BK
1
109-OR-16
109-OR-16
109-OR-10
304-WH-10
103-YL-10
2
R
620-WH-16
157-YL
H
H
H
2
630-GY-16
608-GN-16
12
101-0732
2 1
8Y-8075
8Y-8076
634-WH-16
610-OR-16
367-BU
H
102-BU
H
B
119-PK
103-YL-16
H
K
K
614-PU
H
113-OR
617-BR
200-BK-16
L8
H
H
E
COOLANT
TEMP GAGE
3E-8535
604-OR
610-OR-16
604-OR
VOLTMETER
3E-8533
E
SERVICE
METER
6T-7337
TACHOMETER
3E-3507
K
04
KEY SW
3E-7341
450-YL
200-BK
A
303-BR
A
L19
116-BR-12
614-PU
128-PK
614-PU
112-PU-10
200-BK
02
123-WH
157-YL
614-PU
K
E
START
AID SW
3E-7272
L18
614-PU
H
614-PU
F
A
E
H
00
00
109-OR-10
128-PK
K
367-PU
H
200-BK
A/C
RELAY
7X-1379
109-OR-10
109-OR-10
8
REAR HORN
YL-16
308-YL
G
EU
L
L
200-BK
E
E
V
A
E
H
D
D
FLOOD
LAMP
9X-6853
D
102-BU
200-BK
200-BK
607-PK-16
200-BK
D
102-BU
RADIO
119-PK
536-WH-16
161-PK-16
102-BU-16
443-YL
308-YL
CONNECT HARNESS AS. GG TO
HARNESS AS. B AND BEACON 9R-8250
AS SHOWN
L17
L20
E
603-PK
E
E
E
D
E G
D
G C
8Y-8074
BEACON
9R-8250
603-PK-16
607-PK
A
B
GG
7P-6682
AA
01
620-WH
607-PK
200-BK
RR
119-PK
200-BK
576-PK
577-PU
A
LOADER
LOCK RELAY
7X-1379
D
L20
L26
L2
L24
L46
MM
6
L27
L57
5
K
A
L4
B-9
B-7
C-2
01101-8683PP
B
450-YL
H
H
B
200-BK
576-PK
A
577-PU
119-PK
REAR LOWER
WIPER MOTOR
9X-4530
OR-16
BR-16
441-OR
L56
K
K
406-PU
K
200-BK
265-BK
310-PU-16
450-YL
309-GY
603-PK
610-OR-16
620-WH-16
630-GY-16
617-BR-16
618-YL
608-GN-16
614-PU
614-PU
306-GN
307-OR
618-YL
BAT
603-PK
MTR
608-GN-16
406-PU
762-YL
NOTE B: NORMALLY CLOSED WHEN BRAKE IS DEPRESSED
608-GN
607-PK-16
THIS SCHEMATIC IS FOR THE 416B, 426B, 428B, 436B &
438B BACKHOE COSA (9X7211 CHG 00)
CABLE AS.
630-GY-16
02
447-PK
603-PK
6
3
1
419-YL
4
5
3
419-YL
322-GY
200-BK
200-BK
OR-16
200-BK-10
200-BK
200-BK
143-BR
630-GY
617-BR
604-OR
PP
200-BK
WIRE AS.
603-PK
200-BK
HARNESS AS.
LOCPART NO.IDENT
ATCH WIRE, CABLE,
COMPONENT
CIRCUIT NOT CONNECTED
CIRCUIT CONNECTED
BLUE
GREEN
BU
GN
RD
WH
OR
YL
PK
BK
BLADE, SPADE, RING,
OR SCREW TERMINAL
INTERNAL ELECTRICAL
CONNECTION TO SURFACE
OF COMPONENT
ELECTRICAL CONNECTION
TO VEHICLE STRUCTURE
CONNECTOR
SYMBOL DESCRIPTION
BROWN
PURPLE
GRAY
BLACK
COLORABBREV
PINK
YELLOW
ORANGE
WHITE
RED
BR
PU
GY
NOTE A: NORMALLY OPEN BEFORE REFRIGERANT CHARGE
COMPONENTS ARE SHOWN INSTALLED ON A FULLY
OPERABLE MACHINE WITH THE KEY AND ENGINE OFF,
AND XMSN SHIFTER IN NEUTRAL
UNLESS OTHERWISE SPECIFIED: ALL WIRE IS 18 GAGE
13 2
A
B
C
13 2
F
E
D
6 5 4
6 5 4
9 8 7
C
B
A
9 8 7
F
E
D
123-WH
H
MOTOR
607-PK-16
123-WH
200-BK
200-BK
FLOOD
LAMP
9X-6853
200-BK
COSA HEADLAMP/
FRONT FLOOD
LAMP SW
3E-7269
NOTE F
1
MM
200-BK
TO CAB
200-BK
S
T
B
2
6
367-BU
5
4
1
KK
YL
E
OR
GY
ATCH
BK-16
2
3
1
2
113-OR
128-PK
5
1
4
E
9R-9554
FAN AS.
5D-2855
119-PK
OR-14
RD-14
620-WH-16
9R-9567
109-OR-4
308-YL-16
5
200-BK
6
GY-16
GN-16
200-BK
608-GN
200-BK
1
1
265-BK
KK
GG
GG
GG
L22
L4
K
K
309-GY
H
119-PK
3E-9093
161-PK
552-WH
443-YL
766-GN
568-GN
321-BR
306-GN
307-OR
143-BR
128-PK
322-GY
605-YL
606-GY
122-BU-12
419-YL
L29
405-GY
450-YL
BK-14
BLOWER
MOTOR
3E-7501
NOTE D
BR
LT GN
143-BR
143-BR
415-GN
7
GROUND
HIGH
LOW
L56
200-BK
OPERATOR STATION
OPERATOR STATION
REAR UPPER
WIPER MOTOR
3E-7566
NOTE D
307-OR
200-BK
504-YL
505-BU
503-BR
INTERMITTENT
D
JJ
119-PK
BK-16
L
H
MOTOR
00
200-BK
INTERMITTENT ADJ
B+
GND
E
H
L21
A
BACKUP
ALARM
102-9236
606-GY
BK
BK
536-WH
NOTE H:FOR USE ON 416B & 428B ONLY. USE
FUEL SENDER 6T-0454 ON 426B, 436B & 438B
161-PK
200-BK
610-OR-16
605-YL
568-GN
NOTE
H
307-OR
STOP/TAIL
LAMP
92-2992
NOTE D
200-BK
FLOOD
LAMP
9X-6853
606-GY
200-BK
604-OR
200-BK
605-YL
200-BK
310-PU-16
441-OR
630-GY
308-YL
194-GN-10
200-BK
B
443-YL
WP
H
A-9/F-9
200-BK
630-GY
FLOOD
LAMP
9X-6853
L
MOTOR
103-YL-10
PARK
BRAKE SW
6T-5925
143-BR
200-BK
608-GN
D
200-BK
LL
200-BK
200-BK-12
121-YL
L56
161-PK-16
STOP LAMPS
00
HAZARD LAMPS
121-YL
200-BK
617-BR-16
9X-8079
308-YL
BEACON
FIXED
MAGNETIC
614-PU102-BU-16
121-YL
419-YL
E-2
536-WH-16
H
H
H
H
04
H
607-PK-16
NOTE C: FUSES 10A-9W1442 15A-9W1441 20A-9W1446
H
H
614-PU
116-BR-12
H
200-BK
H
H
H
CONV
TEMP
GAGE
3E-8534
200-BK
H
D
367-BU
H
119-PK
200-BK
K
265-BK
10A
SPARE
H
CHG
9R-8626
FUSE
HOLDER
9W-2035
NOTE C
112-PU-10
10A
- +
200-BK
FLOOD
LAMP
9X-6853
447-PK
- +
SIG
IGN
SEND
GRD
OPERATOR STATION
OPERATOR STATION
IGN
SEND
GRD
IGN
SEND
GRD
IGN
GRD
RESISTOR
8C-4110
607-PK-16
15A
DIODE
8C-5441
15A
LAMP
8M-6176
REAR FLOOD
LAMP SW
3E-7270
ATTACH
3E-7268
BEACON SW
3E-7270
STOP/TAIL
LAMP
92-2992
NOTE D
ACC
A
ST
ON
OFF
B
S
LAMP
8M-6176
LAMP
8M-6176
443-YL
LAMP
8M-6176
XSMN NEUT/FRONT DRIVE
49A
BACKUP ALARM/BEACON
OUT (LAMP)
+ BATTERY
GROUND
31
49
FLASHER
7T-4848
BR
157-YL
MONITOR LAMPS
122-BU-12
618-YL
617-BR
TRANSMISSION
NEUTRALIZER SW
9W-0625
TRANSMISSION
NEUTRALIZER SW
9W-0625
LEFT TURN
IND LAMP
8M-6176
B-7
A-4
PANEL
LAMP
8L-9801
L28
620-WH
FLOOD
LAMP
9X-6853
620-WH
200-BK
E
TURN/HAZARD SW
9X-9547
200-BK
443-YL
2
L29
FLOOD
LAMP
9X-6853
607-PK
200-BK
L5
BK-16
200-BK
RD-00
RD-00
BK-00
BK-00
606-GY
BATTERY
3T-5760
BATTERY
3T-5760
NEGPOS
8
NEGPOS
L6
501-GN
119-PK
200-BK
NN
NN
503-BR
505-BU
504-YL
119-PK
102-BU
113-OR
03
194-GN-10
128-PK
200-BK
C
KEY
R
105-BR-16
JJ
RIGHT TAIL LAMP
LEFT TAIL LAMP
HEATER
CAB
RELAY
7X-1379
NOTE D
634-WH-16
OPERATOR STATION
1
1
3
3
2
2
N/O
N/C
COM
COM
N/O
N/C
CC
CC
CC
CC
ENGINE OIL
PRESS LAMP
8M-6176
RIGHT TURN
IND LAMP
8M-6176
COOLANT
TEMP LAMP
8M-6176
PARK BRAKE
LAMP
8M-6176
6
2
BRAKE SW
6T-5925
NOTE B
BRAKE SW
6T-5925
NOTE B
113-OR
441-OR
LAMP
8M-6176
415-GN
FRONT
WIPER SW
3T-6655
BUCKET
POSITIONER
SOLENOID
3E-8620
R
617-BR
307-OR
306-GN
126-PK
447-PK
121-YL
128-PK
200-BK-16
FUEL
SENDER
3E-7128
NOTE H
B-4
4
122-BU-12
D
506-PU
608-GN-16
618-YL
617-BR
630-GY-16
620-WH-16
610-OR-16
B-4
OR-14
128-PK
603-PK
143-BR
4
200-BK-16
2
10A
304-WH-10
607-PK
620-WH
606-GY
605-YL
122-BU-12
BK-16
618-YL
GY
OR
E
YL
KK
NN
119-PK
10A
109-OR-4
BR
LT GN
2
1
766-GN
103-YL-16
7
5
20A
6
D
LT GN
552-WH
322-GY
143-BR
766-GN
BR
D
200-BK
306-GN
3
307-OR
L
5
2
A-3
15A
126-PK
START AID
COIL
35-8059
405-GY
447-PK
8
200-BK
AWD LAMP
8M-6176
483-BR
483-BR
483-BR
LT GN
ENGINE
OIL SW
7W-1238
161-PK-16
603-PK
9R-8250
321-BR
552-WH
L17
L4
406-PU
143-BR
483-BR
TO PLATFORM
123-WH
128-PK
H
B
322-GY
521-YL
FORWARD
HORN SW
3T-2357
10A
10A
10A
10A
10A
128-PK
113-OR
123-WH
121-YL
116-BR-12
118-GY
119-PK
FRONT FLOOD
BUCKETPOS/HORN
FRONT WIPER
REAR UPPER WIPER
REAR FLOOD
GAGES
RUNNING LAMP
BREAKER
3T-2662
15A
20A
L56
121-YL
308-YL
506-PU
503-BR
118-GY
505-BU
504-YL
500-BR
501-GN
502-OR
776-GN
BK
BK
128-PK
762-YL
118-GY
L25
118-GY
776-GN
109-OR-4
200-BK-10
B
B
H
L
W
P
308-YL
200-BK
265-BK
505-BU
504-YL
503-BR
REAR LOWER
WIPER SW
3T-6655
OPERATOR STATION
MOTOR
BK-16
RD-16
2
614-PU
01
L
A-9
102-BU-16
102-BU-16
102-BU-16
H
6
B-7
ENGINE
SHUTDOWN
SOLENOID
6I-1173
TO
ENGINE
3
4
5
2
1
FRONT
WIPER
3E-7394
NOTE D
568-GN
552-WH
604-OR
113-OR
568-GN
405-GY
568-GN
406-PU
102-BU-16
BLOWER
3E-7501
3
3
4
5
2
STARTER
3E-7905
304-WH-10
BLOWER SW
6P-3236
RESISTOR
7T-3828
NOTE D
517-BU-12
516-GN-12
515-GY-12
120-YL-12
520-WH-12
2
JJ
BB
J
M
FORWARD
HORN
7T-0635
5
102-BU
118-GY
S
G
1
COSA
RUNNING
LAMP SW
3E-7268
DOME
LAMP
4M-3601
200-BK
BK
WH
200-BK
F
10A
MOTOR
515-GY-12
FUSE HOLDER
4K-5122
124-GN-12
630-GY-16
OR-14
BK-14
BK-00
T
E
GN-16
GY-16
BR-16
OR-16
E
H
L
MOTOR
T
200-BK
OPERATOR STATION
521-YL
521-YL
521-YL
522-WH
513-OR
REFRIGERANT SW
NOTE A
9D-6888
513-OR
200-BK
5
E
MM
405-GY
1
7
R
AIR
CONDITIONER
CLUTCH
SOL
3E-7704
308-YL
K
RD-00
ACTION
ALARM
3E-6330
E
TRANSMISSION
NEUTRALIZER
SOL
3E-7507
CONVERTER
SENDER
4W-9972
E
V
FRONT DRIVE
SW
3E-7270
109-OR-4
V
V
S
D
V
V
V
D+
RB+
GND
3
ALTERNATOR
55A 3E-7295 STD
90A 9X-0341 ATCH
109-OR-4
FRONT DRIVE
SOLENOID
3E-7507
552-WH
5
406-PU
TO
PLATFORM
BK
BK
BK
BK
200-BK
611-PU
617-BR
605-YL
607-PK
FLOOD
LAMP
9X-6853
607-PK
TO
FRAME
M
3
5
3
6
113-OR
THERMOSTAT SW
3E-5465
10A FUSE 3K-8782
20A FUSE 8M-0546
20A 124-GN-12
522-WH
200-BK-16
T
6
552-WH
4
143-BR
200-BK406-PU
H
H
COOLANT SW
6T-2665
COOLANT
SENDER
7N-8532
441-OR
FUEL GAGE
3E-8532
RETURN
TO DIG SW
101-0811
405-GY
307-OR
4
2
1
U
200-BK
450-YL
5
T
T
4
308-YL
NEUTRAL/
START SW
8C-5492
PARK BRAKE/
BACKUP ALARM SW
3E-7273
766-GN
443-YL
T
200-BK
200-BK
306-GN
309-GY
450-YL
L12
618-YL
321-BR
603-PK-16
200-BK-16
GG
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.
PANEL LAMP CIRCUIT.
WIPER/WASHER CIRCUIT.
HEATER AND AIR CONDITIONER CIRCUIT.
GROUND CIRCUIT.
TURN SIGNAL CIRCUIT.
START AID CIRCUIT.