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Page Title: MAIN WINCH LH OR RH SPEED SWITCH DOES NOT OPERATE FROM WRECKER CONTROL PANEL (cont)
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TM 9-2320-366-20-2
e139. MAIN WINCH LH OR RH SPEED SWITCH DOES NOT OPERATE FROM WRECKER
CONTROL PANEL (CONT)
WARNING
Read WARNING
KNOWN INFO
TEST OPTIONS
on following page.
7.
Voltage Test or
LH and RH winches operate
STE/ICE-R Test #89
from wrecker control panel.
Is 24 VDC present at
REASON FOR QUESTION
Circuit breaker CB50 OK.
terminal block TB12?
STATION SELECTOR switch to
If 24 VDC is not present, MAIN
WRECKER CONTROL PANEL.
WINCH RH SPEED switch
MODE SELECTOR SWITCH to
and M1089 control panel
NORMAL.
wiring harness is faulty. If 24
STATION SELECTOR switch
VDC is present, M1089 30K
OK.
winch wiring harness is faulty.
MAIN WINCH LH SPEED
NO
switch OK.
M1089 control panel power
cable assembly OK.
M1089 rear lights cable
assembly.
Replace MAIN WINCH RH SPEED
Auxiliary panel cable assembly
YES
switch (para 7-34) and M1089 control
OK.
panel wiring harness (para 7-83).
Dashboard cable assembly OK.
POSSIBLE PROBLEMS
Faulty MAIN WINCH RH
SPEED switch.
Faulty M1089 control panel
wiring harness.
Faulty M1089 30K winch
control wiring harness.
Replace M1089 30K winch
wiring harness (para 7-142).
2-1450.8
Change 1

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