TM 9-2350-261-20-1
1.
2.
3.
Remove heater indicator cover lens (1) and bulb (2).
Measure resistance between bulb center contact and
base.
Does multimeter read 0-5 ohms?
1. Remove rear main harness circuit 400 plug (1)
from control box jack (2).
2. Measure voltage between rear main harness circuit
400 plug (1) pin and ground.
3. Does multimeter read 17 volts or more?
GO TO NEXT PAGE
1. Replace heater bulb
(page 29-42).
2. Verify no faults found.
1. Repair rear main harness
circuit 400 between master
switch and heater control
box (page 14-3).
2. Verify no faults found.
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