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1995 Oldsmobile Cutlass Ciera Question: Front cooling fan not working

 

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mark50, Amarillo, TX, June 11, 2010, 10:46
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I recently took a trip to the mountains. The engine ran hot. When I checked the front cooling fan, (the pusher in front of the radiator) it was not running. I have removed the fan and tested it. It works fine. I have checked the fuses behind the glove box. I have found three and all are good. I need to know if there is a relay or some other switch or link that controls this fan and where it is located.

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  • Answer #1

    June 11, 2010, 12:56
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     Master

    here is link to a repair manual site that will have the electrical diagrams

    http://bit.ly/mitchell_repair_manuals_online

    there are 2 relays, 1 for each cooling fan. Also the Engine Coolant Temperature Sensor is what tells the Engine Computer to turn on the fans. Any Check Engine Lights? Better Check the Coolant Temp Sensor as well.

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    mark50, June 11, 2010, 14:16
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    Thanks, is there a way to determine which relay controls which fan w/o the wiring diagram (and will the wiring diagram really show me which of the four it is)? The tech at AutoZone also said there may be a pressure switch on the back of the compressor that will activate the fan. I have not yet had a chance to look back under the hood.
    BTW, no check engine lights are on. Where is the coolant Temp Sensor. The front fan, (the puller on the engine side of the radiator) cycles on and off with the temperature, so I feel the sensor is not the problem unless there are two different sensors.

    Thanks, again,

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