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Engine Cooling Fan: Testing

NOTE: For Diagnosis/Testing not covered in this article, see appropriate article in ENGINE PERFORMANCE Section.

Disconnect fan motor wire connector and connect it with 14 gauge wire to a good 12-volt battery. If fan runs, motor is O.K., indicating car battery, coolant relay, coolant temperature switch, or A/C relay may be defective. If fan motor does not run when connected directly to a good battery, replace fan motor.

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