whay sensor is responsible for turning on the cooling fans [Archive] - GrandAmGT.com Forum

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bouji1
08-16-2009, 11:26 AM
its not the engine temp sensor,and i cannot figure it out. any help appreciated

pongagt
08-19-2009, 04:03 AM
This has all the information you need including a temperature sensor resistance chart.
http://www.automotivehelper.com/topic660655.htm

AaronGTR
08-22-2009, 11:28 AM
The pcm turns commands the fans on or off based on several things such as coolant temp, vehicle speed, and A/C pressure.

H.O. Driver
08-22-2009, 12:21 PM
Its a 99, the relay system has failed, very common on 99 GA GT's. Hell mine did it too. You have two options, get the harnesses, relays and install them with a new tune on the PCM or just the caspers fan switch and turn them on and off when you need them.