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Page Title:
ELECTRICAL SYSTEM TROUBLESHOOTING |
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 TM 10-3930-673-20-1
2
This paragraph covers electrical system troubleshooting. The Electrical System Fault Index, Table 2-4, lists faults for the
electrical system of the ATLAS. Refer to schematics found at the end of this volume when performing test and corrective
actions.
Fault
Page
Number
Description
No.
1
24 VDC circuits do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
Horn does not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Back-up alarm does not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
Cab defroster fan(s) do not operate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
Instrument panel gage lights do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
One or both headlights do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
Stoplight(s) do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
Taillight(s) do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
Parking lights do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
All turn signals do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
Left turn signal does not operate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
Right turn signal does not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
All floodlights do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
Front floodlight (or forward) does not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15
Boom floodlight does not operate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
Rear floodlight does not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
Blackout marker light(s) and/or taillight(s) do not operate . . . . . . . . . . . . . . . . . . . . . . . . .
18
Blackout drive light(s) do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19
Blackout stoplights do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20
Parking brake indicator light does not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21
Low brake pressure indicator light does not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22
High water temp indicator light does not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
23
Low oil pressure indicator does not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24
High transmission temperature indicator does not operate. . . . . . . . . . . . . . . . . . . . . . . . . .
25
Front windshield wipers do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26
Rear windshield wipers do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
27
Front and rear windshield wipers do not operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28
Windshield washer does not operate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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