Question about 2002 Buick LeSabre

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What is a cooling fan s/p (relay)?

There are 2 cooling fan relays and a cooling fan s/p. which one do I switch with the ac clutch to check if faulty?

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  • jcollier1069 Jan 29, 2009

    thanks I will check all three

  • Anonymous Mar 18, 2014

    Fan blows

    Ac will not cool. Added coolant, very little change. Fan circulates

  • Anonymous Mar 19, 2014

    My old jeep 2004 cooling fan come with a 3 pin connector and the new cooling fan pin connector have 2 pin what I can do

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They are all in the fuse box under the hood the relays dont work in a way where one controls one fan and one controls another fan they run the fans in series for low speed and paralel for high speed. They are numbered 37,39,40 you would have to replace them all to see if that takes care of your problem

Posted on Jan 29, 2009

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If everything is measured O.K. you should check the wiring. Disconnect the connector at the cooling fan motor, connect a test light to the harness from the car (not to the motor side) and run the engine. Watch the temperature gauge and before you the boiling (overheating) the bulb should lit up. If not you should go back with this test step by step to the relay. The relay can be tested if you can find a same one on your relay board and swap temporary (e.g. swap the AC clutch relay with the cooling fan relay)

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Location of ac high pressure cutout switch on a 97 Plymouth voyager. Could it be a different problem? Had to replaced the PCM and a couple sensors because of a short in the wiring cluster. Now the ac...


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1996 Honda Odyessey engine cooling fans don't come on and engine on and engine temperature tends to go up. it will only come on when the AC is switched on. i do not need to run the AC all the time but i...


Check all fuses first. if the fuses are okay, disconnect the engine cooling fan connector and using jumper wires, connect the fan motor directly to the battery and ground. If the fan still doesn't work, replace it. If the fan does work, its relay may be faulty. Check in the engine compartment fuse box for the cooling fan relays. Try switching the cooling fan relays and see if the engine fan comes on and the a/c condensor fan stops working. If so, the engine cooling fan relay is faulty. If the engine fan still doesn't come on with a good relay, then check the engine temperature switch located at the passenger end of the front cylinder head. It is supposed to switch (have continuity) when the engine temperature reaches 205 deg F. You can remove the switch and put it in a pot of close to boiling water (212 deg F). If it doesn't have continuity at that temperature, it is defective.

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Overheating water comeing out of bottol


REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP.CHECK MECHANICAL COOLING FAN.SHOULD HAVE RESISTANCE WHEN TURN WITH HAND.IF FREEWHEELS FAN CLUTCH NEED TO BE REPLACED.CHECK TO MAKE SURE AUXILIARY ELECTRIC COOLING FAN RUNNING HOT WIRE COOLING FAN IF FAN RUNS.YOU HAVE FAULTY THERMO SWITCH LOCATED AT THE BOTTOM OF RADIATOR ON THE LEFT HAND SIDE ON 4 CYLINDER ENGINE FOR V6 ENGINE THERMO SWITCH LOCATED ON THE LOWER RADIATOR HOSE ON THE RIGHT HAND SIDE OF THE ENGINE COMPARTMENT. CHECK FOR BLOWN COOLANT FAN FUSE OR FAULTY RELAY.IF THE AUXILIARY ELECTRIC FAN DONT RUN WHEN HOT WIRED THE ELECTRIC FAN FAULTY.

Jan 03, 2011 | 2000 Audi A6

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2004 audi a4 temperature is going on high when driving and then temperature goes to normal when i stop


SOUND LIKE FAULTY CLUTCH FAN OR THE AUXILIARY ELECTRIC COOLANT FAN NOT RUNNING. CHECK AUXILIARY FAN FUSE AND RELAY. IF LOOK GOOD HOT WIRE TO SEE IF FAN TURNS ON IF NOT FAN FAULTY. IF FAN RUNS YOU HAVE FAULTY THERMO SWITCH. WHICH LOCATED AT THE BOTTOM OF RADIATOR ON THE LEFT HAND SIDE OR ON THE LOWER RADIATOR HOSE ON THE RIGHT HAND SIDE OF THE ENGINE COMPARTMENT.IF FANS OKAY COOLANT LEVEL CORRECT.REPLACE THERMOSTAT.HAVE RADIATOR AND ENGINE FLUSHED.CHECK IN FRONT OF GRILLE MAKE SURE NO DEBRIS BLOCKING OFF AIR FLOW THROUGH RADIATOR CORES AND AC CONDENSOR CORES.

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1 Answer

2001 Volvo S80 2.9L air conditioner stops cooling after about 15 to 20 mins


This could be one of many problems so it's probably best checked by someone with the correct tools and knowledge.

That being said,

With your engine cold, open your hood and start your car. Check to see if your cooling fan is engaged, take note of its speed if it is. Then turn on your AC and listen for the compressor clutch to engage. once you hear it, check to see that your cooling fan is blowing, if it wasn't before. The fan should be on and in high speed whenever your AC is on, whether the engine is hot or not. If it is not, then the reason for losing cold air is that, due to the lack of being properly cooled, your freon pressure is getting too high and is causing the compressor to turn off.

If the fan is blowing as it should be, you may have a faulty compressor or the clutch on it may need to be shimmed.

Another culprit could be that your system is low on freon or the switch that senses the pressure is faulty.

And yet another culprit could be a faulty relay that is overheating and shorting out.

Sorry I couldn't give you a difinitive answer as to what the problem is, but without diagnosing it myself, this is the best I give you.

Good luck!!

Jun 15, 2010 | 2001 Volvo S80

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