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 202 of 1015

TM 9-2320-272-24-1

Table 2-3. Electrical Troubleshooting (Contd).

MALFUNCTION

TEST OR INSPECTlON

CORRECTlVE ACTION

Test 6. Test starter switch for continuity.

Step 1.

Disconnect lead 498 (pin S) at starter switch.

Step 2.

Connect multimeter positive lead to pin B and negative lead to pin S.

Step 3.

Place stark switch to START position and hold.

a.

Multimeter should indicate continuity. If continuity is not indicated, replace starter

switch (para. 3-107).

b.

If continuity is indicated, connect lead 5B to starter switch (pin B) and go to test 7.

2-114