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TM 9-2320-364-20-2
2-1326
20. REVERSE LIGHT DOES NOT OPERATE.
INITIAL SETUP
1.
Replace reverse light
backup lamp
(Para 7-50).
Verify repair, go to
Step 9 of this Fault.
START
YES
NO
Work lights operate indicating
10 to 14 vdc to circuit breaker
CB3.
Circuit breakers CB3 and CB4
OK.
Engine starts indicating 10 to 14
vdc to wire 1871.
Reverse light backup lamp
faulty.
Wire 1149 faulty.
Wire 1435 faulty.
Wire 1891 faulty.
Wire 1871 faulty.
Wire 214 faulty.
ATEC ECU faulty.
Reverse relay R10 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If reverse light backup lamp
filament is faulty, the backup
lamp will not operate.
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)
Jumperwire
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
Solution, Soap (Item 86, Appendix C)
Is continuity measured across
reverse light backup lamp?
WARNING
Personnel Required
Two
Read WARNING
on Page 2-1327
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