Question about 1990 Buick LeSabre

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Radiator cooling fan doesn't come on.

  • The electric cooling fan in my 1990 buick LeSabre doesnt start when the engine requires cooling. How do I track down the problem?

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  • Anonymous Mar 23, 2014

    the fans or not coming on

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First unplug the cooling fan at its plug and supply 12v to the fan if it doesnt run then replace if it does run follow the power wire to the thermal water switch usualy located at the bottom of the radiator.Use test light/probe to check that you have power into the switch and when engine is hot you should have power both in and out of the switch.if not replace thermal water switch.If that is working you will need to find out why you have no power to the switch.Check that your fuse and relay is working correctly.Sometimes just pulling out the relay and putting back in will make it work due to poor contact.Also try swapping relays with others in the same box near battery to identify if relay is faulty

Posted on Oct 27, 2008

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1 Answer

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7_24_2012_7_44_07_pm.jpg

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Is there a fuse that runs the radiator fan in 1997 buick lasabre


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Radiator Fan Stays On


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Various inputs/outputs at the relay should be confirmed to be 100% certain something strange isn't going on.
Above all be careful of the fan itself , if it's running obviously but if it's not it could start during repair

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Jul 03, 2009 | 1990 Buick LeSabre

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