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 260 of 1176

TM 9-2320-361-24-1

0015 00

0015 00-4

HEATING SYSTEMS TROUBLESHOOTING (Contd)

Table 1. Heating Systems Troubleshooting Procedures (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. ENGINE MANIFOLD

HEATER DOES NOT

WORK (Contd)

5. Touch multimeter positive

lead to opposite end of spark

plug cable.

Test 6. Test continuity of ignition coil.

1. Disconnect both input and

output leads of ignition coil.

2. Set multimeter to RX 1000

scale.

3. Touch multimeter negative

lead to pin B (negative) of

ignition coil.

4. Touch multimeter positive

lead to pin A (positive) of

ignition coil.

5. Test continuity of ignition coil

output.

6. Touch multimeter negative

lead to pin B (negative) of

ignition coil.

7. Touch multimeter positive

lead to contact end at ignition

coil output.

1. If continuity is present go to test 6.

2. If continuity is not present, repair

or replace spark plug cable

(WP 0065 00 or WP 0066 00).

1. If continuity is present, go to step 5.

2. If continuity is not present, replace

ignition coil (WP 0065 00 or

WP 0066 00).

1. If continuity is present, go to test 7.

2. If continuity is not present, replace

ignition coil (WP 0065 00 or

WP 0066 00).

TEST 6

STEPS 3

AND 4

TEST 6

STEPS 6

AND 7

FUEL PUMP

IGNITION COIL

FUEL PUMP

IGNITION COIL