TM 5-3805-280-24-1
System Operational Checks
HEATER
YES: Check complete.
NO: See Circuit Checks
in Group 9031-10. Check
wiring harness.
T103130 1929AUG96
Start engine and allow to warm several minutes.
Press heater temperature switch to maximum heat position. Press blower switch to
high speed position.
Does warm air exit from ducts?
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AIR CONDITIONER (IF
YES: Check complete.
EQUIPPED)
NO: See Blower/Air
Conditioning Circuit
Checks in Group
9031-10. See Charging
the system in Group
9031-20.
T103130 1929AUG96
Start engine and run at fast idle.
Press air conditioner switch to ON position.
9031
10
Press blower switch to high speed position.
4
Wait for any warm air in duct system to dissipate.
Is air from ducts cool?
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COMPRESSOR CLUTCH
Engine OFF. Key switch ON. Blower switch on LOW. Air conditioner switch ON.
YES: Check complete.
CHECK
Does compressor clutch "click" as switch is pushed?
NO: Replace compressor
clutch.
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7-13