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TM 10-3930-669-20
2-14. ELECTRICAL SYSTEM TROUBLESHOOTING (CONT).
16. FAN(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
Cab lights operate.
POSSIBLE PROBLEMS
Fan motor faulty.
Wire 36 faulty.
Ground wire 13 faulty.
TEST OPTIONS
Voltage test.
STE/ICE-R #89.
REASON FOR QUESTION
If 22 to 24 vdc are not present,
wire 36 is faulty. If wire 36 is
OK, fan motor is faulty.
2-214
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