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Page Title:
HEATER DOES NOT OPERATE - continued |
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 TM 10-3930-673-20-1
29. HEATER DOES NOT OPERATE (CONT).
3
KNOWN INFO
TEST OPTIONS
Red light extinguished.
Voltage Test.
Is voltage present at heater/
Defrost fans OK.
STE/ICE-R #89.
Wire 80 OK.
air conditioner switch where
REASON FOR QUESTION
POSSIBLE PROBLEMS
red/white wire connects
If voltage is not present, heater/air
pin 2?
Heater/air conditioner switch faulty.
conditioner switch is faulty.
Replace heater/air
NO
conditioner switch
(Para 8-7).
YES
Go to Mechanical System Troubleshooting,
Fault 25, Cab heater does not heat cab.
2-446
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