Question about 1986 Oldsmobile Regency
1986 Olds Regency Broughm: Engine cooling fan continues to run after turning off key. I have to pull the fuse.
The fan is electric. It's powered by a relay that is connected thru a fuse directly to the battery. That relay is commanded by a coolant temperature sensor that should be located on the radiator. The only things that can go wrong here are the relay or the sensor - one of them gets stuck on the On position. To find which all you have to do is to disconnect the sensor: if the fan stops then it's the sensor, if it doesn't then it's the relay. Replace the broken part.
Posted on Aug 01, 2010
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Posted on Jan 02, 2017
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Fig. 1: Typical electric fan motor and resistor locations
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