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BATTERIES USE EXCESSIVE WATER - TM-9-2320-272-24-10260
NO ALTERNATOR OUTPUT cont'd

TM-9-2320-272-24-1 Truck 5-Ton 6x6 M939 M939A1 M939A2 Series Trucks (Diesel) Manual
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TM 9-2320-272-24-1
Table 2-3. Electrical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 6.
Connect multimeter positive lead to contact end of pin E at voltage regulator harness
connector and negative lead to contact end of pin E at alternator harness connector.
Continuity should be present.
a. If continuity is present, go to step 7.
b. If continuity is not present, replace voltage regulator harness (para. 3-131).
Step 7.  Connect multimeter positive lead to contact end of pin C at voltage regulator harness
connector and negative lead to contact end of pin C at alternator harness connector.
Continuity should be present.
a. If continuity is present, go to step 8.
b. If continuity is not present, replace voltage regulator harness (para. 3-131).
Step 8.  Connect multimeter positive lead to contact end of pin B at voltage regulator harness
connector and negative lead to contact end of pin D at alternator harness connector.
Continuity should be present.
a. If continuity is present, go to test 3.
b. If continuity is not present, replace voltage regulator harness (para. 3-131).
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