Car Batteries
Honda Prelude

What do you check if the electric cooling fan on an 89 Honda Prelude does not shut off and drains the battery?

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2005-04-01 16:38:06
2005-04-01 16:38:06

The relay is sticklng. Get a manual on your car from DISCOUNTAUTOREPAIRMANUALS.COM and get acquainted with your car. They are about $9 More than likely your temperature sensor switch on the radiator is stuck closed. It should be located on bottom of the radiator. Really easy to replace just make sure the engine is cold, then make sure your radiator cap is on tight. after that just screw the old one out and quickly put the new one in. Due to vacuum in the radiator you shouldn't have to much coolant come out in the process.

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The cooling fan is electric and the sensor reads that your car is hot. It stays on, even when the car is off so that it can cool your engine to acceptable temperatures. If it didn't, and the car remains too hot, it can warp parts and destroy your engine. If the fan runs for an exceptionally long time, and drains your battery giving you a no start or weak battery slow start condition, you may have a bad cooling fan relay.

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