TM-9-2320-273-10

TRUCK, TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER

TECHNICAL MANUAL; OPERATOR’S MANUAL

DECEMBER 2012

TM-9-2320-273-10 - Page 288 of 452

ELECTRICAL SYSTEM

SYMPTOM

One or more electrical systems not working.

MALFUNCTION

Switch(es) are not in the ON position or inter-vehicular cable is not securely

connected.

CORRECTIVE ACTION

Check appropriate switch(es) are in ON position and, if a lamp system, that

blackout switch is in NORMAL position. If tractor is coupled to trailer and

problem is with trailer lamp system, ensure inter-vehicular cable is

connected securely between tractor and trailer. Turn appropriate switch(es) in

ON position. If necessary, securely connect inter-vehicular cable.

MALFUNCTION

Resettable circuit breakers have tripped (M915A1).

CORRECTIVE ACTION

NOTE

M915A1 is equipped with resettable circuit breakers.

1. Check resettable circuit breakers have not popped out, indicating a

momentary overload or short circuit. Open access panel and push in to

reset any circuit breakers which have popped out.

2. Recheck failing electrical system. If resetting fails to correct problem or

breaker button pops out again, notify supervisor.

END OF TASK

STEERING

SYMPTOM

Hard steering, shimmy, or wandering.

MALFUNCTION

Incorrect tire air pressure.

CORRECTIVE ACTION

Check cold air pressure in all tires. Fill as required. Refer to Tire Pressure in

WP 0003 for proper pressures.

TM 9-2320-273-10

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