Table 1. Heating Systems Troubleshooting Procedures - continued

TM 9-2320-361-24-1

0015 00

HEATING SYSTEMS TROUBLESHOOTING (Contd)

Table 1. Heating Systems Troubleshooting Procedures (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Test 4. Test manifold heater spark

1. ENGINE MANIFOLD

plug.

HEATER DOES NOT

WORK (Contd)

1. Remove manifold heater

spark plug (WP 0065 00 or

WP 0066 00).

2. Connect jumper wire from

spark plug to engine ground.

3. Disconnect wiring harness

from manifold heater fuel

pump.

4. Turn power accessory switch

to ON position.

5. Position manifold heater

1. If spark plug does arc, go to test 9.

switch to START.

2. If spark plug does not arc, replace

spark plug. (WP 0065 00 or

WP 0066 00) and repeat test 4.

3. If retest of test 4 fails to produce an

arc to engine, go to test 5.

Test 5. Test manifold spark plug

cable.

1. Remove cable from manifold

heater spark plug

(WP 0065 00 or WP 0066 00).

2. Remove spark plug cable at

ignition coil.

3. Set multimeter to RX 1000

scale.

4. Touch multimeter negative

lead to contact end of spark

plug cable at the plug.

FUEL PUMP

IGNITION COIL

MANIFOLD

HEATER SPARK

PLUG CABLE

TEST 5

STEPS 4

AND 5

MANIFOLD

HEATER

SPARK PLUG

0015 00-3