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 241 of 1015

TM 9-2320-272-24-1

Table 2-3. Electrical Troubleshooting (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

31. BATTERY/ALTERNATOR GAUGE INOPERATIVE

NOTE

If STE/ICE is available, perform NG31 - Gauge Test (para. 2-24).

Test 1. Test battery/altamator gauge voltage. Perform malfunction 28.

Test 2. Check battery/alternator gauge for continuity.

CAUTION

Place battery switch to OFF position. If ground is open and

battery voltage is present, the multimeter may be damaged.

Step 1.

Set multimeter to RX1 for continuity reading.

Step 2.

Connect multimeter negative lead to vehicle chassis ground and positive lead to

indicator case. Multimeter should read continuity.

a.

If multimeter doer not read continuity, clean and tighten indicator mounting points.

b.

If multimeter doer read continuity, replace battery/alternator gauge (para. 3-86).

END OF TESTING!

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