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What would cause the AC radiator fan in a '92 Toyota Corolla to come on and off very rapidly and haphazardly?
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Answered 2015-07-17 17:50:01
I had a 89 Chevy Corsica that was doing the same thing. I replaced the ECM (Electronic Control Module) and it solved my problem. Your ECM controls your cooling fan by supplying a ground to the cooling fan relay. Something in your ECM has gone bad and it must be replaced. Good luck!
You may have a bad connection in the wiring between the fuse and the fan 2 relay or a poor or coroded connection between the fan 2 relay and the condensor fan motor. Check the grounds also and clean them up also.
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