ELECTRICAL TROUBLESHOOTING - TM-9-2320-386-24-1-10084

TM 9-2320-386-24-1-1

0012 00

UNIT TROUBLESHOOTING PROCEDURES

EXTENDED SERVICE PROGRAM (ESP)

TRUCK, CARGO, 2-1/2-TON, 6X6, M44A3 SERIES TRUCKS (DIESEL)

M35A3, W/O WINCH (NSN 2320-01-383-2047); W/WINCH (NSN 2320-01-383-3850);

M35A3C, W/O WINCH (NSN 2320-01-383-2050); W/WINCH (NSN 2320-01-383-2049);

M36A3, W/O WINCH (NSN 2320-01-383-2048); W/WINCH (NSN 2320-01-383-2046).

ELECTRICAL TROUBLESHOOTING

GENERAL

a. This work package provides the information needed to diagnose and correct malfunctions of the

electrical system.

b. Listed are electrical malfunctions that may occur in individual systems of the vehicle. The wiring

schematic found in WP 0386 00 is to be used as a reference when performing electrical troubleshooting

procedures. The following is also provided for finding specific problems and solutions in Electrical

Troubleshooting.

c. In troubleshooting the electrical system, multimeters will be used to make resistance or continuity

tests and voltage or low ampere current tests. Multimeters may be found in common no. 1 and no. 2 unit

maintenance automotive shop sets.

Electrical Troubleshooting

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

BATTERY SYSTEM

1. ALL VEHICLE ELECTRICAL SYSTEMS INOPERATIVE

*WARNING*

Battery acid (electrolyte) is extremely harmful. Always wear

safety goggles and rubber gloves when performing battery

maintenance. Severe injury will result if acid contacts eyes or

skin.

Do not smoke, have open flame, or make sparks when performing

battery maintenance. Batteries may explode, causing severe

injury to personnel.

Remove all jewelry such as rings, dog tags, bracelets, etc. If

jewelry or disconnected battery ground cable contacts battery

positive post, a direct short can result, causing damage to

equipment or severe injury to personnel.

When removing battery cables, disconnect ground cable first. Do

not allow tools to come in contact with vehicle when disconnecting

cable clamps. A direct short can result, causing instant heating of

tools, tool damage, battery damage, or battery explosion, and

severe injury to personnel.