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TM 10-3930-669-20
2-14. ELECTRICAL SYSTEM TROUBLESHOOTING (CONT).
14. STOPLIGHT 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
Taillight OK
24 VDC circuits operate
Voltage test.
STEA/CE-R #89.
POSSIBLE PROBLEMS
REASON FOR QUESTION
Stoplight lamp faulty.
Stoplight faulty.
Wire 27 faulty.
Brake switch faulty.
Wire 27A faulty.
This question eliminates a
possible problem or group of
possible
problems
determining
where
troubleshooting continues.
2-198
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