TM 5.3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
26. BATTERIES DO NOT HOLD A CHARGE.
WARNING
Although KEY SWITCH must be on and battery ground cable connected to test electrical circuit
voltage, turn off KEY SWITCH and disconnect battery ground cable before doing resistance tests
or replacing parts. This will keep you from getting shocked and prevent damage to parts and
equipment.
Step 1. Check for defective batteries (TM 9-6140-200-14).
a.
If batteries are defective, replace (page 2-838).
b.
If batteries are not defective, go to step 2.
Step 2. Start engine (TM 5-3805-254-10) and check that BATT/CHGNOLTS gage (1) reads in CHG scale. Using
multimeter, set to 20 vdc scale, connect red test lead to battery positive (+) cable (2) and black test lead to battery
negative (-) cable (3). Have assistant run engine at 1100 rpm and check for 13 to 15.5 vdc on multimeter. Have
assistant shut down engine (TM 5-3805-254-10). Disconnect test leads.
a.
If BATT/CHGNOLTS gage (1) is not in CHG scale and multimeter does not read 13 to 15.5 vdc, go to
Malfunction 27, GENERATOR DOES NOT CHARGE (page 2-213).
b.
If BATT/CHGNOLTS gage (1) is in CHG scale and multimeter reads 13 to 15.5 vdc, go to step 3.
Step 3. Make sure all switches and controls that draw electrical current are off (TM 5-3805-254-10). Check for voltage
drain on electrical system as follows: using two 1/2-inch open-end wrenches, loosen two screws (4) and using
battery terminal puller, pull two battery negative (-) cables (3) from battery posts (5). Using multimeter set to 20
vdc scale, connect red test lead to one battery negative (-) cable (3) and black test lead to ground. Check for no
voltage reading on multimeter. Disconnect test leads.
a.
If multimeter reads voltage drain, notify Direct Support Maintenance.
b.
If multimeter reads no voltage, place two battery negative (-) cables (3) on battery posts (5) and
tighten two screws (4) using two 1/2-inch open-end wrenches.
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