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TM 10-3930-669-20
2-14. ELECTRICAL SYSTEM TROUBLESHOOTING (CONT).
7. TAILLIGHTS, FRONT LIGHT, GAUGE LIGHTS, AND MAST LIGHT DO 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
Cab interior lights operate.
POSSIBLE PROBLEMS
Fuse 6 faulty.
Wire 25A faulty.
Front light switch faulty.
TEST OPTIONS
Visual test.
REASON FOR QUESTION
If element is broken, fuse 6 is
faulty.
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2-162
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