Question about 2002 Chevrolet Impala

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Change all the relays for fans and the fans are still not coming on

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  • Chevrolet Master
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Could have PCM problems.bad engine coolant temperature sensor cause no cooling fans to turn on.

Posted on Apr 19, 2013

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I have a 2004 chevy malibu which overheats due to the fans not coming on..i checked the actuall fans and they do come on..checked relays and coolant temp sitch and its good


if your fans come on with ac on,then your fans are OK ,coolant temp sensor, is bad,need to be changed,(that is how fan relay get it's ground,or it gets direct ground when you turn the AC on)
so if it comes on with AC on,your fans and relays are good
you can run the car with ac on till you fix the problem(it only hurts your gas millage)

Nov 11, 2013 | 2004 Chevrolet Malibu

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Cooling fans will not run


By that year they should be electrically driven. Check your cooling fan relay, RDI fuse, and coolant temperature switch. See here p261

http://www.turboninjas.com/camry/eg1.pdf

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My radiator fans 2001 olds alero do not come on. i have change relays and new coolant sensor. are there 2 sensors


Check radiator fan relay first by changing with another with same part number in the fuse panel.If its good check for 12 volts at the fan switch coming in and going back out.If their is going back out replace fan switch.

Jul 13, 2011 | 2001 Oldsmobile Alero

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The truck runs hot especially when idling. I have changed the thermostat. Should I change the radiator fan relay?


Well my friend, that depends, does you ran come on when you let it idle? If so check your water pump, if not then check the fan fuse then the relay. Hope this helps.

Jun 09, 2011 | 2003 Dodge Durango

1 Answer

How do u change fan relays on a 92 seville 4.9l.


the fan relays are in with the other relays in the relay box,check the coolant sensor,or just replace it.If you turn on the ac,will the fans come on?If so,the relays are fine.be sure the coolant level is fine,and there is no air in the cooling system.This,along with the coolant sensor are the main causes for this problem.Is the cooling fan fuse good? I hope this will help you.

Oct 06, 2009 | 1988 Cadillac Sedan DeVille

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Radiator fan will not come on my 1999 jeep over heats when standing still


Jeeps had a problem with the fan relays and fans on those models. The relay is mounted inside the engine compartment behind the passenger headlight. Try removing the relay and jumping it out. If the fans come on when the relay is jumped, you can try replacing the relay to see if that fixes the problem. If the fans don't come on, check the wiring from the relay to the fans. You can disconnect the fan connector and jump power and ground directly to that to eliminate bad wiring. If it still doesn't turn on the fan needs to be replaced.

Apr 17, 2009 | 1999 Jeep Grand Cherokee

1 Answer

Ac on max fan switch on high and neither coolant fans come on


Check relays (usually un.derhood) first See owner manual for location. Then check engine coolant temperature sensor. If it's not providing high temp signal, the fans won't come on. However, the fan usually comes on when a/c is engaged. Leaing towards relays

Mar 01, 2009 | 1998 Chevrolet Lumina

1 Answer

Fan relay


You should the same relay in your vechile just swap it and see what happens.

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