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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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After-Run Timer Relay Control
After-Run Timer Relay Control
Ignition "OFF".
Coolant temperature above 221-230°F (105-110°C).
Fan temp. switch closed grounding circuit 904.
Timer Relay closed supplying battery voltage to circuit 903.