TM 5-3805-248-23-1
BATTERY, STARTING AND CHARGING SYSTEM TROUBLESHOOTING PROCEDURES
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WARNING
Remove all jewelry, watch, rings, etc. prior to disconnecting cables from batter-
ies or other electrical source. Items can come in contact with battery or electrical
source and cause electrical shock. Failure to follow this warning may cause
injury or death.
Make sure wheels are chocked and bowl is lowered to ground for all tests. Fail-
ure to do so may cause injury or death.
Eye protection must be worn when performing maintenance where components
or particles could fly out during procedure. Failure to take precautions may
cause injury.
NOTE
The following tests require two mechanics one at control and the other at com-
ponent you are checking.
For detailed electrical diagram, refer to WP 0005 00.
1.
Electrolyte Is Boiling or
1.
Check for physical damage to
1. If damaged, replace battery
Excessive Use of Water.
batteries or evidence of a leak.
2. If batteries don't appear to be damaged,
go to Test 2.
2.
For maintainable batteries, check
1. If specific gravity is 1.225-1.235,
electrolyte specific gravity. Refer to
recharge battery. Refer to TM 9-6140-
TM 9-6140-200-14.
200-14.
2. If specific gravity is OK or battery is
maintenance free, go to Test 3.
3.
Check charging voltage.
a. Place battery disconnect switch in
OFF position (TM 5-3805-248-10).
b. Set multimeter to appropriate
voltage range (WP 0018 00).
c. Connect multimeter red lead to
orange wire on alternator.
d. Connect black lead to ground.
e. Operate engine (TM 5-3805-248-
10).
f.
Voltage range is 26.6 - 28.3 volts.
1. If not within specified range, replace
alternator (WP 0055 00).
2. If voltage is in range, go to Test 4.
