Question about 1989 Pontiac Grand Am

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Why won't the coolant fan turn on? - 1989 Pontiac Grand Am

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Bad ect engine coolant temperature sensor or relays

Posted on Apr 20, 2015

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Posted on Jan 02, 2017

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1 Answer

Acadia white smoke, high temp and fan won't come on


Do you have an extended warranty ?
Usually white smoke from the exhaust means the engine is burning coolant thru a blown head gasket or intake gasket.
You should also be low on coolant in the radiator.

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How do i test coolant temp sensor


This is normally the fan relay which is fried. It can be that the fan is pulling too much current , which causes the relay to fry. It is a good thing to change both fan and relay.
If the sensor is faulty, then you won t see coolant temperature on the instrument panel.

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The cooling fans won't turn on..


Did you try your radiator fan relay ? if thats not it i would try the coolant temp switch for the engine control computer . lastly if those dont solve the problem you have ecu issues or the cooling fan module.

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My 99 mazda protege over heated and sprayed coolant all over, my first thought was leaky hose or blew the radiator, but I waited till day light to see if I could tell where it was coming from and nothing...


There are two fans on many cars, but one is for the radiator cooling fan and the other is an auxiliary fan which is energized when the air-conditioning is turned on. Try turning on your air-con and see if this fan comes on. Pressure test your system. You won't know if you have a coolant leak for certain until this has been performed.

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New coolant fan and new control module but coolant fan does not work on my 2002 ford escort zx2


Try checking the fuse box under the hood. It should have a fuse marked cooling fan or cooling system. If the car does start, that means the computer isn't out, but maybe there is a bad relay by the fan or in the circuit or even the temp sensor may be bad. The fan won't run until the temp is high enough; usually by the time the thermostat opens.

Aug 11, 2012 | 2002 Ford ZX2

2 Answers

Fan wont come on


You may have a faulty thermostat. If its stuck closed the fan won't run. Thermostat tells the car when to turn on/turn off the fan based on how hot the engine is getting.

Jul 29, 2012 | 1998 Honda CR-V

1 Answer

Radiator fan won't turn on at all


on the 92 civic you have 2 sensors for the coolant, one is a coolant fan switch and the other is a temp sensor. the fan switch tells the computer to turn on the fans at a certian temp. i would suggest replacing the fan switch which is located on the thermostat housing. if that doent work it could be the relay. I have owned my 92 civic hatch for 10 yrs and have done all the work to it myself. Also a mechanic by trade. Hope this will help you out

Dec 12, 2011 | 1992 Honda Civic

1 Answer

Radiator fan's won't turn on.


replace the coolant temp sensor this contols the fan as to when thay come on and off

Aug 01, 2011 | 2003 Mitsubishi Galant

1 Answer

Engine fan won't come on


IF COOLANT FAN FUSE AND RELAY OKAY.HOT WIRE COOLANT FAN TO SEE IF FAN MOTOR OKAY.IF FAN MOTOR OKAY.THE ENGINE COOLANT TEMPERATURE SENSOR MORE LIKELY BAD.THE ENGINE COOLANT SENSOR WHEN ENGINE COOLANT GETS HOT IT CAUSES ENGINE COOLANT TEMPERATURE RESISTANCE TO DECREASE CAUSE COMPLETE CIRCUIT IN WHICH POWER FROM PCM TO ECT SENSOR WILL SENT POWER TO COOLANT FAN RELAY THEN CAUSE COOLANT FAN TO TURN ON. HAVE ECT SENSOR OR ENGINE COOLANT TEMPERATURE SENSOR CHECK USING CODE SCANNER TO MAKE SURE ITS WORKING BEFORE SPENDING EXCESS MONEY.

Jun 18, 2011 | 1998 Ford Taurus

2 Answers

Car is over heating, boiling in the overflow, this after 5km's the oil looks fine ?????? help


Check your coolant levels and make sure the hose between the coolant reservoir and the radiator aren't clogged. The cooling fan on the radiator may not be directly driven by the serpentine belt and may be on a clutch. If the clutch is broken the fan won't cool the radiator and the radiator won't cool the car. Get the car good and hot and see if the fan kicks on. To temporarily relieve the overheating in the engine, turn the heat on in your car.

May 04, 2011 | 1989 Toyota Cressida

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