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TM 10-3930-669-20
2-14. ELECTRICAL SYSTEM TROUBLESHOOTING (CONT).
15.
HORN 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
24 vdc circuits operate.
POSSIBLE PROBLEMS
Horn contact plate faulty.
Wire 21 faulty.
Horn faulty.
Fuse 5 faulty.
Wire 27 faulty.
TEST OPTIONS
Visual test.
REASON FOR QUESTION
If element is broken, fuse 5
is faulty.
2-206
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