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TM 9-2320-364-20-3
2-2926
6. FAN SPEED DOES NOT LOWER FROM HIGH SPEED TO LOW SPEED (CONT).
12.
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 OK.
Wire 1733 faulty.
Wire 1435 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If wire 1733 is loose, faulty, or
shorted to ground, 22 to 28 vdc
will not be input to high speed
fan solenoid valve.
WARNING
Are 22
to 28 vdc
measured on wire 1733 at
high speed fan valve
connector, terminal 2 with
hydraulic selector switch in
AUTO position?
Repair wire 1733 (see
schematic Fig 2-67)
or notify DS
Maintenance.
Verify repair, go to
Step 19 of this Fault.
Read WARNING
on Page 2-2927
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