Question about Pontiac Sunbird

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My cooling fan motor isn't turning on my 2004 Pontiac Sunfire. My car is running hot because of this. How can I change the motor myself without spending a tonne of money on a dealership.

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Check fan fuse,if ok conect batt. volt.to fan,if not working,remove bolts from fan shroud and slide fan assembly out,undo motor from assembly.but if fan works,unplug coolant sensor,if fan starts,its the sensor,if it doesnt,check relay and circuit.

Posted on Sep 26, 2009

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First check if the motor is bad.We ran a hot wire from hot to hot on battery.The fan kicked on.Ours was an inline fuse so ran wire from the positive wire on fan to a wire (hot) to key switch.This way you turn on the key and fan comes on

Posted on Sep 25, 2009

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1 Answer

Why does cooling fan run constantly on 2004 pontiac sunfire


Have you checked the ecm for trouble codes ? The fan runs all the time as a safety to try to prevent the engine from overheating.

Aug 06, 2014 | 2004 Pontiac Sunfire

1 Answer

2004 sunfire cooling is always on when the car is running


The cooling fan is controlled by a temperature switch located on the radiator or on the engine. When the temperature of the coolant exceeds the switch temperature rating, the switch closes and energises a relay that switched a voltage to run the fan and it will continue to run until the coolant temperature drops back below the opening point of the switch. In your case, you may need to have the cooling fan replaced.

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When I run the Ac on my 2001 Sunfire my car ocer heats, ans my ac does not really cool. Someone told me it was my fan not turning on/cooling the engine. Does the fan come on when the car turns on or only...


will turn on with a/c engaged
also will turn on when pre determined temp hase been reach when a/c is off
check relays and fuses also for power at fan motor

Jun 26, 2011 | Pontiac Sunfire Cars & Trucks

1 Answer

1998 Pontiac Sunfire Symptoms: -Overheating


What are you going by to say it's overheating , temp gauge ? Have you test to see what the actual temp. is > Hook - up a scan tool ,what's the PCM - engine computer seeing for engine temp. ? 223 degress the PCM should turn on the cooling fan . You could buy a Non-Contact Infrared Thermometer With Laser Targeting at harbor freight ! Radiator very hot ????? What is the right temp .
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Could be a bad temp gauge . Is the coolant surging inside the cooling system ? Does it have a radiator cap ? Have you replaced it ?

May 06, 2017 | 1998 Pontiac Sunfire

1 Answer

Where is coolinf fan switch located on 2004 pontiac sunfire


It's inside the computer.

Turn the AC on. If the fan still does not turn on then you may have a fan relay or computer issue.

Also if the engine does not get hot enough the fan will not turn on. You may have a defective temp sensor or thermostat

May 26, 2010 | 2004 Pontiac Sunfire

1 Answer

02 sunfire overheating


make sure you have radiator full of coolant
run the car to operating temperature
check the operation of the cooling fan
feel the upper radiator hose and the lower radiator hose. they both should be hot.
if one is cold then you may have a bad thermostat or restricted flow
if cooling fan does not come on when engine is hot then you have bad cooling fan switch, relay or motor.
good luck

Mar 07, 2010 | 2002 Pontiac Sunfire

1 Answer

Cooling fan


Yes, it's probably the PCM. I had the same problem, and upon replacing the PCM it started working again. If your cooling sending unit is new, and so many parts of your fan assembly are new, it's probably not receiving the signal from the sending unit. Hope this helps.

Jul 22, 2009 | 1997 Pontiac Sunfire

1 Answer

Cooling fan fuse


most likely the cooling fan has a short in it. disconnect the connector on the fan. If it doesn't blow now its the fan motor. If it still blows you have a short from the fuse to the motor. What this means is the hot wire is touching bare metal somewhere

Jul 17, 2009 | 2002 Pontiac Sunfire

1 Answer

My 1998 pontiac sunfire is getting hot but not overheating


the fan may be bad but you can find the hot side of the plug and run a hot to the battery and see if the fan comes on. if it doesent you know you have a bad fan if it does you can run a wire to the fuse panel so that it comes on when the car does and shuts off when you shut the car off

Nov 14, 2008 | 1998 Pontiac Sunfire

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