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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.
13.
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 TB14?
STATION SELECTOR switch to
If 24 VDC is not present,
WRECKER CONTROL PANEL.
MAIN WINCH LH SPEED
MODE SELECTOR SWITCH to
switch and M1089 control
NORMAL.
panel wiring harness is faulty.
STATION SELECTOR switch
If 24 VDC is present M1089
OK.
30K winch control wiring
MAIN WINCH RH SPEED
harness is faulty.
switch OK.
M1089 control panel power
NO
cable assembly OK.
M1089 rear lights cable
assembly.
Auxiliary panel cable assembly
Replace MAIN WINCH LH SPEED
OK.
YES
switch (para 7-34) and M1089 control
Dashboard cable assembly OK.
panel wiring harness (para 7-83).
POSSIBLE PROBLEMS
Faulty MAIN WINCH LH SPEED
switch.
Faulty M1089 control panel
wiring harness.
Faulty M1089 30K winch
control wiring harness.
Replace M1089 30K winch
wiring harness (para 7-142).
2-1450.20
Change 1

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