TM 9-2320-272-24-1
Table 2-3. Electrical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
10. 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 !
11. 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. 3-78 or 3-71).
Test 2. Test charging voltage (malfunction 9).
If proper voltage is indicated, problem is not in generating system. Perform battery system
troubleshooting, malfunctions 2 through 5.
END OF TESTING!
12. NO ALTERNATOR OUTPUT
NOTE
If STE/ICE is available, perform NG50 - Charging Circuit Teats
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. 3-78 or 3-71).
Test 2. Test alternator lead 568 for voltage.
Step 1. Disconnect lead 568 at alternator.
Step 2. Set multimeter to 50-volt range.
Step 3. Connect multimeter positive lead to lead 568 and negative lead to vehicle chassis
ground.
Step 4. Place battery switch to ON position.
a. Multimeter should indicate battery voltage.
b. If battery voltage is indicated, place battery switch to OFF position and replace
alternator (para. 3-79 or 3-80).
c. If battery voltage is not indicated, go to step 5.
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