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 193 of 1015

TM 9-2320-272-24-1

Table 2-3. Electrical Troubleshooting (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Test 5. Test starter solenoid contractors.

Step 1.

Set multimeter to 10-volt range.

Step 2.

Connect multimeter between starter solenoid terminals.

Step 3.

Crank engine and observe multimeter. A voltage reading exceeding 0.4 volt indicates

defective starter solenoid.

a. Replace starter (para. 3-82).

b. If malfunction still exists, go to tests 6, 7, and 8.

2-105