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Dane M. Bertha Posted on Mar 17, 2012

Radiator cooling fans dont work fuse not blown. how do i check if relay is bad?

5 Related Answers

Anonymous

  • 1 Answer
  • Posted on Apr 14, 2009

SOURCE: radiator fans won't come on

Hey I had the same problem with my 95 olds cutlass supreme. First i checked that the fans were receiving power by testing the voltage. Then I noticed that they were recieving voltage just not coming on. When the engine temp got pretty high, they finally came on, another words the gauge could be broken or the engine just does not tell the fans to come on until it has reached a high temp. So i started the vechicle, left it in park and gave it gas until the temp guage read very high, it reached like 230 to 250 then the fans came on. Try getting the temp up there and then see if the fans come on an dlet me know at [email protected]

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joecoolvette

joecoolvette

  • 5660 Answers
  • Posted on May 09, 2009

SOURCE: where is and what does the cooling system fan

The fan temperature sensor,(Fan switch), is activated by the cooling systems coolant. Activated by it's temperature.
It's located under the hood, passenger side, upper engine area, below the alternator, and mounted in the intake manifold.
My money, is on the fan temperature sensor being bad.

The fan switch will usually be cylindrical shaped, the bottom is made of brass, and the top has a black insulator material, with a rubber type plug on top. The plug will have two wires coming out, going into the engine wiring harness. One wire is Black, one wire is Yellow.

The fan relay is located in a relay panel. I can't tell you at present, whether it's in a black plastic box, that you remove a cover to access it, or the relay is exposed. If it's in a plastic box, under the cover it should state what each relay is for, and where they are located inside the box.

The relay panel is under the hood, on the passenger side, front engine area, on the passenger side of the radiator.


Jonah Oneal

  • 14092 Answers
  • Posted on May 31, 2009

SOURCE: radiator cooling fan

check coolant first .if all good .hot wire the fan make sure the electric fan motor is operating.if runs when hot wire.replace the relay and coolant temperature sensor.if fan dont run.when hot wire.replace the fan motor.

Ronnie Wilson

  • 1596 Answers
  • Posted on Jun 15, 2009

SOURCE: cooling fans dont engage! 1998 oldsmobile silhouette!

Your Problem Can VERY WELL BE with the Temp Sensor, As It Is the First in This Electrucal Circut . it Waits for 210-230 Degree Engine temp and Gives that Sygnal to the ECM then ECM Grounds out the Cooling FAN RELAY To Turn ON the FANS and the Temp Sensor is Usualy THE #1 Culpret Closley in front of the RELAY.
There are 2 Sensors On this Vehicle The One You Replaced and One Located At Trans Side of
Engine Closer to Front of Vehicle At the Head ,Thereis a 2 wire Plug On it and This Sensor Goes to the ECT witch CONTROLS COOLING FAN RELAY. Hope this Helps and if you Need A Diagram For this It Must be Emailed as FixYa Does NOT Support Large Picture Files. My Email Add. Is MY
Screen Name Here on FixYa @aol.com

Tinette Booth

  • 176 Answers
  • Posted on Dec 19, 2009

SOURCE: Does a 95 cutlass supreme have a fuse for the

There are three fuses and two relays for your coolant fan. They should all be in your underhood fuse box. They may not be marked "coolant fan", so check them all, (2) 60 amp , (1) 20 amp, (1) 15 amp. If all the fuses are good, you may have a bad fan switch (temp sensor). It tells the fan when to turn on, follow the wire from the fan motor to find it.

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Coolling fans dont work

Check for a blown fuse----look at it & test it
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If the fuse is good,the relay works,the fan works,you may need
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check fuses, check fan relays , per fsm
Fsm = factory service manual.
alldata.com
there are 3 cooling fan relays Hi/low and control
the ECU outputs only high and low.
the ECU is hard coded, (softrware) to run fans. and uses
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Cooling fans are not coming on, what could be the problem?

Either the temp sensor is bad, or the relay is bad. or the fan motor is bad. Or you have a blown fuse.
Look for fuse first.... To test if fan motor is bad disconnect the connector to the fan and jumper it to the battery.if it spins it's good. the other two. use a component locator to find their location and replace. they are inexpensive. Temp sensor is in the cooling circuit (radiator...maybe next to thermostat) the relay will be in a fuse box under the hood.
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My beetle 2001 radiator fan no working and aircond also come out without cool air, engin overheating problem. i send to workshop and check wiring and fuse all in good condition. please give advise what...

Because there is no supply to the fan , it is not working. So you need to check the fan with a direct link to test , is working check the RELAY box for the fan relay, next check on the thermistor, the control circuit of the temperature controller to trigger the fan relay. Also check on the fuse to the relay unit.
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Also the eveporator, condenser, pressure switch must be checked independantly.
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A bad relay will not blow a fuse. The radiator cooling fan must run with the A/C on or the vehicle will overheat and the A/C will perform poorly. First I would check the draw on you cooling fan motor-it may be blowing the fuse, or you have a wire shorted to ground.
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Overheating water comeing out of bottol

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check the radiator coolant fan,or the R C fan relay. If radiator coolant fan went out your car will over heat when idle .
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What would cause my radiator fans not to run

A lot of different things fall into this senario.Low coolant level,air in the cooling system,and a stuck thermostat,or,a bad coolant sensor,or even a bad cooling fan relay,or the cooling fans are bad.Turn the defrost on or the ac,the cooling fans should come on if the fans,and the relay are ok,if so,replace the thermostat,and coolant sensor,and bleed the cooling system of air.
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