TM-9-2320-279-20-1

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

TECHNICAL MANUAL; MAINTENANCE INSTRUCTIONS; ORGANIZATIONAL MAINTENANCE, VOLUME 1 OF 3

TM-9-2320-279-20-1 - Page 280 of 985

TM 9-2320-279-20-1

Troubleshooting Malfunctions (Cent)

Table 2-9. Troubleshooting (Conf)

klalfunction

Test or Inspection

Corrective Action

HEAVY-DUTY WINCH (CONT)

2. WINCH WILL NOT REWIND (M984) (CONT).

Step

5.

Check resistance of wire No. 681 from high idle box connector pin B to socket in male

solenoid connector.

If resistance is more than zero ohms, replace wire No. 681 (para 17-24).

Step 6. Check resistance of wire from male solenoid connector pin to vehicle ground.

If resistance is more than zero ohms, replace wire.

Step 7. Check for defective heavy-duty selector valve. Connect controller. Set ENGINE and P’IU

ENGAGE switches to ON. Press IN switch on remote controller and listen for clicking sound

at valve.

If clicking sound is not heard, replace heavy-duty selector valve (para 19-1 1).

IN

OUT

Step

8.

Remove controller cover (para 17-24). lkst resistance on wire No. 681 between connector

socket B and IN switch terminal No. 4.

If resistance is more than zero ohms, replace defective wire No. 681 (para 17-24

and fig. 2-8).

Step 9. Check if heavy duty winch will pull load.

If heavy-duty winch will not pull load, notify the supervisor.

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