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TM 10-3930-669-20
2-14. ELECTRICAL SYSTEM TROUBLESHOOTING (CONT).
12. CAB 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)
KNOWN INFO
TEST OPTIONS
24 vdc circuits operate.
Visual inspection.
POSSIBLE PROBLEMS
REASON FOR QUESTION
Light wire 36 faulty.
Light ground wire faulty.
Fuse 10 faulty.
Wire 36 faulty.
Lamp faulty.
This question eliminates a
possible problem or group of
possible
problems
determining
where
troubleshooting continues.
2-188
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