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TM 9-2320-364-20-2
2-1342
22. CLEARANCE, SIDE MARKER, AND ID LIGHT(S) DO NOT OPERATE.
INITIAL SETUP
1.
Go to Step 5 of this
Fault.
START
YES
NO
Taillights operate indicating
10 to 14 vdc to wire 1008.
Circuit breakers CB2 and CB4
not tripped.
Work lights operate indicating
10 to 14 vdc to CB2.
Side marker light lamp or LED
faulty.
Wire 1012 faulty.
Side marker light faulty.
Circuit breaker CB2 faulty.
Wire 1835 faulty.
Wire 1920 faulty.
Relay R2 wire 1435 faulty.
Clearance lights relay R2 faulty.
Wire 1012 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Visual inspection.
Fault is common to all
clearance, side marker, and ID
lights if none 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)
Equipment Condition
ENGINE OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2820-364-10)
References
TM 9-2320-364-10
TM 9-4910-571-12&P
Does at least one clearance,
side marker, or ID light
operate?
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