Subaru XT 1988 Service Manual page 1076

4-7
AIR CONDITIONING SYSTEM
Pulser and Related Circuits Diagnoses
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Yes
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Normal
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Yes
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Faulty amplifier
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Set A/C switch, Blower switch, High/Low
pressure switch to ON.
Disconnect 2-pin (pole) connector from
pulser plot to check if magnetic clutch turns
off.
Yes
Disconnect ground wire of AIC relay ex-
citing coil, leading to amplifier, to see if
magnetic clutch turns OFF.
54
Conduct continuity test of wiring from
amplifier to negative side (-) of ignition
coil. Does continuity exist?
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No
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Faulty wiring
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No
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Faulty relay
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