TM 9-2350-261-20-1
Remove air box heater switch (page 11-7).
Remove circuits 406 (1) and 27C (2) plugs from air
box heater switch jacks (3) and (4).
Measure resistance between switch jack (3) and (4
with air box heater ON.
Does multimeter read 0 ohms?
1.
2.
3.
4.
Remove circuit 27 plug (1) from instrument panel
circuit breaker (2).
Measure resistance between instrument panel
wiring harness circuit 27 (1) and 27C (3) plug
pins.
Does multimeter read 0 ohms?
1.
2.
3.
1. Replace air box heater
switch (page 11-7).
2. Verify no faults found.
1. Repair front main harness circuit 406 (page 14-3).
2. Verify no faults found.
1. Repair instrument panel
wiring harness circuit
27C/27 (page 14-3).
2. Verify no fault found.
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