TM 9-2350-277-20-1
ENGINE CRANKS BUT WON’T START BELOW 40
(AIR BOX HEATER IS
USED)—Continued
0022 00
B6Y
1. Turn MASTER SWITCH to OFF.
2. Remove instrument panel for access. See task: remove
instrument panel mounts and ground leads (WP 0295 00).
3. Remove circuits 406 (1) and 27C (2) plugs from air box heater
switch jacks (3) and (4).
4. Measure resistance between switch jacks (3) and (4) with air box
heater switch depressed.
5. Does multimeter read 0 ohms?
YES
NO
B6YN
1. Replace air box heater switch
(WP 0282 00).
2. Verify no faults found.
B7Y
1. Remove circuit 27 plug (1) from instrument panel
circuit breaker (2).
2. Measure resistance between cable assembly 12349858 circuit 27
(1) and 27C (3) plug pins.
3. Does multimeter read 0 ohms?
YES
NO
B7YN
1. Repair special purpose cable
12349858 circuit 27C/27
(WP 0382 00).
2. Verify no faults found.
B8Y
1. Repair harness 12349881 circuit 406 (WP 0382 00).
2. Verify no faults found.
0022 00-8
