TM-9-2320-361-20
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
OCTOBER 1991
TM-9-2320-361-20 - Page 162 of 1207
TM 9-2320-361-20
Table 2-4. Electrical Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
BATTERY SYSTEM
1. ALL VEHICLE ELECTRICAL SYSTEMS INOPERATIVE
WARNIN G
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.
CAUTION
During installation of battery terminals, ensure positive clamps are
installed on positive (+) posts and negative clamps are installed on
negative (-) posts. Failure to connect clamps to correct posts will reverse
polarity of circuitry and may cause damage to rectifier diodes in
alternator, vehicle wiring, and radios (if equipped).
Do not use a hammer during installation of battery terminal. Spread
battery terminal open, or damage to equipment may result.
Step 1. Open door of battery compartment. Loosen two thumbscrews and slide batteries onto
running board. Visually check connections of battery cables.
Ensure battery cables are correctly connected to batteries (para. 4-48).
Step 2. Visually check batteries for cracks and leaks. Check terminal posts for corrosion and
breaks (TM 9-6140-200-14).
a.
b.
c.
Replace any battery that is cracked, leaking, or has broken terminal posts (para. 4-49).
If terminal posts or cable clamps are corroded, use soda and water solution to neutralize
battery acid. Remove battery ground cable no. 7 from negative post first. Remove cable
clamps from battery posts, clean posts, and clamp mating surfaces to bright metal.
If battery terminals are clean and malfunction still exists, go to test 1.
2-77
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