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 250 of 1176

TM 9-2320-361-24-1

0014 00

0014 00-14

INDICATORS, GAUGES, AND WARNING SYSTEM TROUBLESHOOTING (Contd)

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

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

7. FRONT WHEEL

DRIVE INDICATOR

LIGHT INOPERATIVE

Test 1. Test lamp.

1. Place power accessory switch

to ON position and service

light switch to ON position.

2. Disconnect lead 27A from

indicator lamp.

3. Set multimeter to RX 1 scale.

4. Touch positive lead of

multimeter to input of

indicator lamp and negative

lead to frame ground.

Test 2. Test front wheel drive

indicator lamp input voltage.

1. Disconnect lead 27A from

indicator lamp.

2. Set multimeter to a voltage

range that measures 24 VDC.

3. Connect multimeter positive

lead to 27A and negative lead

to frame ground.

Test 3. Test input voltage to front

wheel drive lock-in switch.

1. Remove lead 27A from pin A

of lock-in switch.

2. Connect negative lead of

multimeter to frame ground.

3. Touch positive lead of

multimeter to lead 27A.

Voltage of 24 VDC should be

present.

1. If continuity is present, go to test 2.

2. If continuity is not present, replace

indicator lamp (WP 0118 00).

1. If voltage is present, reconnect and

go to test 4.

2. If voltage is not present, go to

test 3.

1. If voltage is present, replace lock-in

switch (WP 0118 00).

2. If voltage is not present, repair or

replace lead 27A (WP 0090 00).

TEST 2

STEP 3

TEST 1

STEP 3

TEST 3

STEP 3

FRONT WHEEL

DRIVE LOCK-IN

SWITCH

INDICATOR LAMP