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TM 9-2320-364-20-2
2-1188
6. WORK LIGHT(S) WILL NOT OPERATE.
INITIAL SETUP
1.
Go to Step 7 of this
Fault.
START
YES
NO
Headlights operate, indicating
12 vdc input to circuit breaker
CB4.
Work light lamp faulty.
Work light internal power wire
faulty.
Work light internal switch faulty.
Work light internal ground wire
faulty.
Wire 1435 at work light harness
connector faulty.
Circuit breaker CB4 faulty.
Wire 1040 faulty.
Wire 1040A faulty.
Wire 1435 between relay R4
and ground faulty.
Relay R4 faulty.
Wire 1292 faulty.
Work light switch faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Visual inspection.
To determine if fault is common
to both work lights.
2-20. ELECTRICAL SYSTEM TROUBLESHOOTING (CONT).
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
STE/ICE-R (optional) (Item 3, Appendix G)
Multimeter (Item 44, Appendix G)
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
References
TM 9-2320-364-10
TM 9-4910-571-12&P
Materials/Parts
Primer (Item 65, Appendix C)
Sealing Compound (Item 77, Appendix C)
Does only one work light
operate?
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