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TM 10-3930-669-20
17. HEATER BLOWER DOES NOT OPERATE (CONT).
KNOWN INFO
24 vdc circuits operate.
Fuse 9 OK.
Wire 38 OK.
Heater blower switch OK.
Blower motor ground wire OK.
POSSIBLE PROBLEMS
Fan blower motor faulty.
KNOWN INFO
24 vdc circuits operate.
Fuse 9 OK.
Wire 38 OK.
Heater blower switch OK.
Blower motor ground wire OK.
Fan blower motor OK.
POSSIBLE PROBLEMS
TEST OPTIONS
Continuity test.
STE/ICE-R #91.
REASON FOR QUESTION
If continuity is not present,
ground wire is faulty. If ground
wire is OK, fan blower motor is
faulty.
TEST OPTIONS
Verify repair.
REASON FOR QUESTION
If heater blower operates, fault
has been corrected.
2-222
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