TM-9-2320-361-24-1
2-1/2 TON, 6X6, M44A2 SERIES TRUCKS
TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE PART 1 OF 2
AUGUST 2006
TM-9-2320-361-24-1 - Page 185 of 1176
TM 9-2320-361-24-1
0012 00
0012 00-1
FIELD TROUBLESHOOTING
2-1/2 TON, 6X6, M44A2 SERIES TRUCKS (MULTIFUEL)
BATTERY AND CHARGING SYSTEM TROUBLESHOOTING
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, use open flame, or make sparks when
performing battery maintenance. Batteries may explode,
causing severe injury to personnel.
• Remove all jewelry, such as rings, identification 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 cables, disconnect the ground cable first. Do
not allow tools to come into 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.
Doing so may cause damage to equipment.
NOTE
• Refer to general troubleshooting instructions in the
Introduction to Troubleshooting Work Package (WP 0004 00)
prior to performing any battery and charging system
troubleshooting.
• The electrical systems troubleshooting procedures use
multimeters in resistance or continuity tests and voltage or
low ampere current tests. Multimeters may be found in the
Common no. 1 and no. 2 Unit Maintenance Automotive Shop
Sets.
• The electrical wiring schematic for the M44A2 series truck
can be found in WP 0473 00.
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