36 - 2
Electrical Connections
On the electrical diagram opposite the electrical connectors
(example, CTG to HB) are shown looking on the mating face
of each connector when they are disconnected.
The wire numbers and colours, where appropriate, are
shown as an aid to identification whilst fault finding.
Before fault finding make sure that you understand how the
the electrical circuits work. Most potential faults can be
traced using a multimeter to carry out continuity checks on
wires, switches and soleniod coils. See
Service
Procedures, Electrical Testing Methods
for more details.
Component Key:
1
Servo harness
HA
Auxiliary hydraulics harness loop connector
HB
Auxiliary hydraulics connector
HC
Rear cab harness loop connector
HD
Rear cab harness connector
HE
Pilot control valve solenoid connector
HF
Right hand joystick connector
HG
Seat microswitch connector
HH
Left hand joystick connector
2
Right hand joystick
2a
Microswitch - Mode
2b
Microswitch - Excavator quickhitch latch control (if
fitted)
2c
Microswitch - Hydraulic changeover solenoid valve
(if fitted)
3
Left hand joystick
3a
Microswitch - Rear Horn
3b
Microswitch - Excavator quick hitch latch control (if
fitted)
4
Seat mounted microswitch
5
Pilot control valve solenoid
6
Auxiliary hydraulics wiring harness, see
Basic System
Operation, Circuit Schematics
7
Hydraulic change over circuit, see
Basic System
Operation, Circuit Schematics, Auxiliary and
Hydraclamp Hydraulics
8
Rear horn circuit, see
Basic System Operation, Circuit
Schematics
9
Dedicated quick hitch circuit, see
Basic System
Operation, Dedicated Quick Hitch
10
Rear cab harness
A1
Fuse - Hydraulic Auxiliary
CP
Relay base - Auxiliary (jaw bucket)
CM
Relay base - Rear horn
Splices:
SA
SB
SC
SD
SH
TA
Section D
9803/3280
Section D
36 - 2
Issue 1
Precision Control (Servo)