Subaru XT 1988 Service Manual page 1072

4-7
AIR CONDITIONING SYSTEM
Compressor Clutch Diagnoses
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Compressor clutch is not engaged.
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Check both 15A fuses for blower relay.'
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Fuse blown.
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Fuse OK
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Locate short-circuit spot, and repair or replace dam·
aged parts.
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Check AIC relay fuse 15A in engine compartment.
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Fuse blown.
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Locate cause of problem and repair.
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Fuse O.K.
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Connect 12-volt test light to L wire of AIC relay.
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Ground the other end of test light.
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Light ON
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Check lead wire and ground wire of compressor clutch
for connection. When there is nothing wrong with
them, replace compressor clutch.
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1~
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L_ig_htrO __ N ______
~1
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Replace air conditioner relay.
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Light OF F
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Connect 12-volt test light to LR wire of relay.
Ground the other end of test light.
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Light OFF
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Ground AIC relay RG lead wire.
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Clutch is ergaged (ON).
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Short G and R lead wires (of body harness) running
to pu Iser ampl ifier.
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Clutch is engaged (ON).
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Replace pulser or amplifier to determine which is
faulty.
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Clutch is engaged (ON).
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Check ground circu it of mode selector switch.
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Clutch is not engaged (OFF).
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Replace AIC relay.
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Clutch is not engaged (OFF).
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Ground LB lead wire running to thermostat.
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Clutch is not engaged (OFF).
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Replace thermostat.
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