TM 5-3805-280-24-1
System Operational Checks
Disconnect harness from heater blower motor.
3c HEATER BLOWER
YES: Heater blower
MOTOR (M5) CHECK
motor is good. Check
(MACHINES
Connect 24 volts to heater blower motor, and ground motor.
wiring harness.
EQUIPPED WITH
HEATER ONLY)
Does heater blower motor operate?
NO: Replace heater
blower motor.
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4 HEATER AND AIR CONDITIONER CIRCUIT CHECKS
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BLOWER MOTOR 20
Remove fuse block cover.
YES: Fuse is OK.
AMP FUSE (F13) CHECK
Remove fuse from fuse block.
NO: Replace fuse. If fuse
blows again, check for
Using ohmmeter, check fuse for continuity.
short.
Is continuity measured?
9031
10
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6
Remove fuse block cover.
A/C CONTROLLER AND
YES: Fuse is OK.
RELAYS 5 AMP FUSE
(F14) CHECK
Remove fuse from fuse block.
NO: Replace fuse. If fuse
blows again, check for
Using ohmmeter, check fuse for continuity.
short.
Is continuity measured?
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7-15
