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Page Title: MAIN WINCH LH OR RH FREESPOOL SWITCH DOES NOT OPERATE FROM WRECKER CONTROL PANEL (cont)
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TM 9-2320-366-20-2
e140. MAIN WINCH LH OR RH FREESPOOL SWITCH DOES NOT OPERATE FROM WRECKER
CONTROL PANEL (CONT)
WARNING
Read WARNING
KNOWN INFO
TEST OPTIONS
on following page.
6.
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 TB19?
STATION SELECTOR switch to
If 24 VDC is not present, MAIN
WRECKER CONTROL PANEL.
WINCH LH FREESPOOL
MODE SELECTOR SWITCH to
switch and M1089 wrecker
NORMAL.
control panel wiring harness
MAIN WINCH LH and RH
are faulty.
SPEED switches operate.
RH 30K winch freespools.
NO
MAIN WINCH LH FREESPOOL
switch OK.
30K winch pneumatic manifold
solenoid L17 OK.
Replace MAIN WINCH LH FREESPOOL
POSSIBLE PROBLEMS
YES
switch (para 7-34) and M1089 wrecker control
panel wiring harness (para 7-83).
Faulty MAIN WINCH LH
FREESPOOL switch.
Faulty M1089 control panel
wiring harness.
Faulty M1089 30K winch
control wiring harness.
Faulty jumper wire.
Faulty 30K winch pneumatic
manifold solenoid L19.
Faulty wrecker air system.
2-1456.6
Change 1

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