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Page Title:
CAB DEFROSTER FAN(S) DO NOT OPERATE. |
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 TM 10-3930-673-20-1
2
4. CAB DEFROSTER FAN(S) DO NOT OPERATE.
INITIAL SETUP
Personnel Required
Tools and Special Tools
Two
Tool Kit, General Mechanic's: Automotive
(Item 18, Appendix F)
References
STE/ICE-R (Item 17, Appendix F)
TM 10-3930-673-10
Multimeter, Digital (Item 9, Appendix F)
Equipment Condition
Engine shut down (TM 10-3930-673-10)
Auxiliary fuel shut-off switch OFF
Parking brake on (TM 10-3930-673-10)
Wheels chocked (TM 10-3930-673-10)
START
WARNING
1
KNOWN INFO
TEST OPTIONS
Read WARNING on
None.
Voltage test.
following page.
STE/ICE-R #89.
POSSIBLE PROBLEMS
REASON FOR QUESTION
Is 24 vdc present at wire 80 of
Fan(s) faulty.
Wire 80 faulty.
If 24 vdc is present, fan or switch
non-operational fan?
Circuit breaker CB8 faulty.
faulty.
Wire 3 faulty.
Relay K1 faulty.
Wire 1 faulty.
Circuit breaker CB6 faulty.
Wire 9 faulty.
Connector J2 faulty.
Connector P2 faulty.
Go to Step 3 of this
NO
fault.
YES
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