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Buick
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1986
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Skyhawk Sport, 2.0 P, Automatic
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Repair and Diagnosis
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Engine Performance
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System
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1.8L Turbo Tests W/Codes
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Chart C12 - Fan Control Circuit
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ECM Control
ECM Control
A/C on.
Vehicle speed less than 35 MPH.
Circuit 409 to A/C Fan Relay terminal "C" grounded by ECM at terminal C1.
Coolant temperature less than 230°F (110°C).