TM-9-2320-361-24-1

2-1/2 TON, 6X6, M44A2 SERIES TRUCKS

TECHNICAL MANUAL; FIELD AND SUSTAINMENT MAINTENANCE PART 1 OF 2

AUGUST 2006

TM-9-2320-361-24-1 - Page 247 of 1176

TM 9-2320-361-24-1

0014 00

0014 00-11

INDICATORS, GAUGES, AND WARNING SYSTEM TROUBLESHOOTING (Contd)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

6. IN-TANK FUEL PUMP

INOPERATIVE

Test 1. Check fuel pump operation.

1. Turn power accessory switch

to ON position.

2. Listen or feel for fuel pump

humming or vibration at top

of pump.

3. If vibration can be felt or

heard, go to test 4.

4. If no vibration can be felt or

heard, go to test 2.

Test 2. Test input voltage and ground

to fuel pump.

1. Remove lead 654 from fuel

pump.

2. Set multimeter to a voltage

scale that will measure 24 VDC.

3. Connect positive lead of

multimeter to lead 654 and

negative lead of multimeter to

ground lead 79.

1. If battery voltage is not present, go

to test 5.

2. If battery voltage is present, go to

test 3.

Table 1. Indicator, Gauges, and Warning System Troubleshooting (Contd).

FUEL PUMP

TEST 2

STEP 3

654

79