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 TM 9-2330-329-14&P
ALTERNATOR AND CHARGING CIRCUIT TROUBLESHOOTING--Continued
0026 00
Table 1. Troubleshooting Procedures--Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
UNDERCHARGED
3.
Check for excessive
If test reveals excessive voltage
BATTERIES--Continued
voltage drop between
drop, clean and tighten
alternator and batteries
connections at positive and
(refer to
negative output terminals on
TM 9-6140-200-14).
alternator (refer to WP 0111 00).
Check ground cable connections
between negative battery
terminal and engine frame. Verify
problem is solved. If connections
were okay, notify Direct Support
maintenance.
2.
OVERCHARGED
1.
Check battery case for
Replace damaged batteries
BATTERIES (INDICATED
cracks or damage.
(refer to WP 0053 00). Verify
BY HIGH WATER
problem is solved. If batteries
USAGE)
were okay, go to step 2.
2.
Check specific gravity and
Replace defective battery (refer
individual voltage of each
to WP 0053 00). Verify problem
battery cell (refer to
is solved. If battery is okay, notify
TM 9-6140-200-14).
Direct Support maintenance.
3.
HIGH OR LOW
Obtain and record battery
If voltage does not increase
ALTERNATOR OUTPUT
voltage for both batteries in
notably between engine not
series with engine not running.
running and engine running (0.6
Start engine and adjust to 1000
V dc or more), notify Direct
rpm. Take another battery
Support maintenance.
voltage reading.
4.
SHORT VOLTAGE
Check that alternator and battery
Correct battery connection errors
REGULATOR LIFE
connections are correct. (Note
(refer to WP 0054 00). If problem
that reversed polarity, even
is not corrected, notify Direct
momentarily, will damage
Support maintenance.
voltage regulator).
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