Mechanics

COOLING FAN

2003 Pontiac Grand Am

Engine Cooling problem
2003 Pontiac Grand Am 6 cyl Front Wheel Drive Automatic 86000 miles

i have a 2003 pontiac grand am and the fan do not work but wend I put the a/c works how a can see if the problem are a electrical like a sensor or relay thanks
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Lupimanic
September 29, 2009.



It is usually a fan switch that goes bad, the AC operates off a different circuit.

Mmprince4000
Oct 2, 2009.
I change the fan sensor or temp sensor

Tiny
Lupimanic
Oct 2, 2009.
Change the fan switch, which activates the cooling fans.

Mmprince4000
Oct 3, 2009.
Were it`s locate the switch?

Tiny
Lupimanic
Oct 3, 2009.


http://www.2carpros.com/forum/automotive_pictures/108325_cooling_fan_circuit_1.jpg



See if you can enlarge this.

Mmprince4000
Oct 4, 2009.
I went to all I check relay sensor wires fuses thermostat can be the pcm.?
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Tiny
Lupimanic
Oct 4, 2009.
Most cars have a fan switch that triggers the cooling fan. I could not find one in the drawing, only relays.
It may be the PCM that trips the fan relays, based on coolant temp switch.

Mmprince4000
Oct 5, 2009.
Yes no swich for the fan that is very bad.
Thanks

Tiny
Lupimanic
Oct 5, 2009.
Well maybe not so bad, change the coolant temp sender.

Mmprince4000
Oct 6, 2009.

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