TM-9-2320-272-24-1

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4

JUNE 1998

TM-9-2320-272-24-1 - Page 259 of 1015

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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