TM 9-2320-272-24-1
Table 2-3. Electrical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
41. BATTERIES USE EXCESSIVE WATER
NOTE
If STE/ICE is available, perform NG81 - Battery Tests or NG50 -
Charging Circuit Tests (para. 2-24).
Test charging voltage (malfunction 9).
END OF TESTING!
42. BATTERIES RUN DOWN IN SERVICE
NOTE
If STE/ICE is available, perform NG50 - Charging Circuit Tests
Test 1. Check for loose, broken, or missing alternator or fan drivebelts.
a. Adjust loose drivebelts (M939/A1) (para. 3-78).
b. Replace broken or missing drivebelts (para. 3-79 or 3-80).
Test 2. Test charging voltage (malfunction 9).
a. If proper voltage is indicated, problem is not in generating system. Refer to battery
system troubleshooting.
b. If proper voltage is not indicated, perform malfunction 44.
END OF TESTING!
43. NO ALTERNATOR OUTPUT
NOTE
If STE/ICE is available, perform NG50 - Charging Circuit Tests
Test 1. Check for loose, broken, or missing alternator or fan drivebelts.
a. Adjust loose drivebelts (M939/A1) (para. 3-78).
b. Replace broken or missing drivebelts (para. 3-79 or 3-80).
Test 2. Test continuity of alternator harness.
Step 1. Disconnect quick-disconnect for lead 566.
Step 2. Disconnect voltage regulator harness connector at alternator and voltage regulator.
Step 3. Set multimeter to RX1 for continuity reading.
Step 4. Connect multimeter negative lead to contact end of lead 566 and positive lead to pin F.
Continuity should be present.
a. If continuity is present, go to step 5.
b. If continuity is not present, replace voltage regulator harness (para. 3-131).
Step 5. Connect multimeter positive lead to contact end of pin D at voltage regulator harness
connector and negative lead to contact end of pin B at alternator harness connector.
Continuity should be present.
a. If continuity is present, go to step 6.
b. If continuity is not present, replace voltage regulator harness (para. 3-131).
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