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Pontiac
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1988
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Lemans FWD L4-98 1.6L
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Repair and Diagnosis
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Heating and Air Conditioning
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Compressor HVAC
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Compressor Clutch
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Testing and Inspection
Compressor Clutch: Testing and Inspection
The A/C Request position displays the status of the
A/C signal
line to the ECM. The A/C Clutch position displays ON when the ECM energizes the compressor clutch.