Question about 1999 Buick Century

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Cooling Fans Not Working

I have a 99 Buick Century with a 3.1 V6. I have checked the relays all three check good, I have checked the fuses they are all good. I have jumped the fans and they both work. I feel there is a thermostat controled swith that sends a signal when the fans need to come on but I cannot find it. can anyone tell me where it may be located?

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  • golfer2iwin
    golfer2iwin Oct 20, 2012

    In the compartment where the air filter and the computer are. The wires where eating away by a mice and a nest. fixed the wires and the fans now work. Had all the relays fuses checked. MICE

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It is located behind your thermostat housing. Follow your upper radiator hose to the housing and look between it and the engine. You will see the electrical connection.

Posted on Oct 20, 2012

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Thermo sensor switch in cylinder head might be in thermostat housing or in the cyl head some place in that area look closely you will see it usually 2-3 wire plug it is brass with black plastic type plug on end good luck.John

Posted on Jan 24, 2009

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