Thread: Help me with my cooling issues.

For some reason my fans only will come on if i turn my a/c on or if i turn on my manual switch.

I am looking for the instructions for the manual cooling fan how to. I remember blacknblack or soemthing like that had a really good how to.

I just need to go over what i have my fan keep quit working by pcm controll and this is getting old.

Manual Cooling Fans

Yea i think its is my coolent sensor. someone has my scan tool.... but i have had this issue for years. My fans only come on if i turn the a/c on. I unpluged the sensor and my fans still do not come on.

was that the coolant level sensor? or a different one?

Originally Posted by QwikGT

coolant temp sensor located under the T-stat, tapped into the LIM

thanks, just wanted to make sure it wasn't the one i was going to disable lol (coolant level sensor)

replaced the temp sensor under the intake manifold. my cooling fans still do not turn on. Except on low when i turn the a/c on.


I tested the relays they test good to. I even swaped out my pcm for another.

Any other idea?

You need to see what ECT the computer is seeing. Get that scanner back.

pcm is seeing proper ect.

Must have a bad wire somewhere.

yea, but the a/c works the fan. just not the ecu.

Stock PCM? If the computer's seeing the correct ECT, it's not a sensor problem. I assume the GP's the same as the Regal in that the HVAC control just reports to the PCM for AC, so if the fans are turning on with the AC, it's not the wiring there, either.