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TM 10-3930-669-20
2-14. ELECTRICAL SYSTEM TROUBLESHOOTING (CONT).
8. REAR LIGHT(S) DOES NOT OPERATE.
INITIAL SETUP
Tools and Special Tools
Tool Kit, General Mechanic's: Automotive
(Item 1, Appendix B)
Multimeter (Item 2, Appendix B)
STE/ICE-R (Optional) (Item 14, Appendix B)
References
TM 10-3930-669-10
Equipment Condition
Engine OFF (TM 10-3930-669-10)
MAIN POWER switch OFF (TM 10-3930-669-10)
Parking brake applied (TM 10-3930-669-10)
Wheels chocked (TM 10-3930-669-10)
NOTE
The following procedure covers the rear lights, but the general steps can apply for the front and
mast lights.
KNOWN INFO
24 vdc circuits operate.
POSSIBLE PROBLEMS
Light lamp faulty.
Light lead faulty.
Wire 24 faulty.
Fuse 8 faulty.
Wire 24A faulty.
Rear light switch faulty.
TEST OPTIONS
Visual inspection.
REASON FOR QUESTION
This question eliminates a
possible problem or group of
possible problems
determining where
troubleshooting continues.
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