Before Carrying Out Troubleshooting Of Electrical System - Komatsu Galeo PC138US-8 Shop Manual

40 Troubleshooting

Before carrying out troubleshooting of electrical system

Connection table of fuse box
a This connection table shows the devices to which each power supply of the fuse box supplies power (A
switch power supply is a device which supplies power while the starting switch is in the ON position and
a constant power supply is a device which supplies power while the starting switch is in the OFF and ON
positions).
a When carrying out troubleshooting related to the electrical system, you should check the fuses and fus-
ible links to see if the power is supplied normally.
Type of power supply
Switch power supply
Switch power supply
Switch power supply
Constant power supply
Starting switch
Switch power supply
PC138US, USLC-8
Fusible link Fuse No.
1
2
F02
3
(45A)
4
5
6
7
F02
8
(45A)
9
10
11
12
F02
(45A)
13
14
15
16
F03
(45A)
17
18
19
ACC
20
Fuse
capacity
10A Emergency operating circuit
30A Solenoid valve
15A Cigarette lighter
10A Windshield washer
10A Horn
5A Working lamp relay, horn relay
10A Rotary lamp (If equipped)
20A Working lamp
10A Radio, speaker
5A Air conditioner
20A Air conditioner unit
10A Optional power supply (1)
10A Optional power supply (2), power supply of 12 volt
10A Spare
5A Air conditioner
10A Radio backup, room lamp
20A Machine monitor, pump controller, starting switch
30A Engine controller
5A Engine controller
5A PPC oil pressure lock solenoid
SEN02467-00
Destination of power
1
3