MAIN WINCH LH OR RH FREESPOOL SWITCH DOES NOT OPERATE FROM WRECKER CONTROL PANEL (cont)

TM 9-2320-366-20-2

e140. MAIN WINCH LH OR RH FREESPOOL SWITCH DOES NOT OPERATE FROM WRECKER

CONTROL PANEL (CONT)

KNOWN INFO

TEST OPTIONS

14.

Continuity Test or

LH and RH winches operate

STE/ICE-R Test #91

from wrecker control panel.

Is continuity present from

REASON FOR QUESTION

Circuit breaker CB50 OK.

terminal block TBC to wire

STATION SELECTOR switch to

If continuity is not present,

WRECKER CONTROL PANEL.

M1089 winch control wiring

MODE SELECTOR SWITCH to

harness is faulty. If continuity

NORMAL.

is present, 30K winch

MAIN WINCH LH and RH

pneumatic solenoid L19 is

SPEED switches operate.

faulty.

RH 30K winch freespools.

MAIN WINCH RH FREESPOOL

switch OK.

Faulty 30K winch pneumatic

manifold solenoid L17.

MAIN WINCH LH FREESPOOL

switch OK.

Replace M1089 winch control

YES

M1089 control panel

wiring harness (para 7-142).

wiring harness OK.

Faulty jumper wire.

POSSIBLE PROBLEMS

Faulty M1089 30K winch

control wiring harness.

Faulty 30K winch pneumatic

manifold solenoid L19.

Faulty wrecker air system.

Replace 30K winch pneumatic

manifold solenoid L19 (para 17-29).

2-1456.22

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