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TM 9-2320-364-20-3
2-2924
6. FAN SPEED DOES NOT LOWER FROM HIGH SPEED TO LOW SPEED (CONT).
11.
Replace rectifier
(Para 17-20).
Verify repair, go to
Step 19 of this Fault.
YES
NO
Heater blower motor operates,
indicating CB15 OK.
Fan speed does not lower when
hydraulic selector switch is in
the AUTO or CRANE/SRW
position.
Rectifier faulty.
Wire 1733 faulty.
Wire 1435 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Diode Test.
If rectifier is faulty, 22 to 28 vdc
will not be input to high speed
fan supply valve.
WARNING
Can rectifier pass a diode
test?
Read WARNING
on Page 2-2925
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