Join Date: Sep 2001
Location: Melbourne, FL, USA
Guys I have almost a similar problem with a camaro 95 V6 3.4L.
I have one Fan only and it doesn't work until you turn the A/C on.
After trouble shooting I found the following:
1- there is nothing wrong with the fan because it works when I turn the A/c on.
2- there nothing wrong with the relay because as I said the fan comes on when I turn the A/C and I even changed the relay with a different on but still nothing.
3- I replaced the ECT (coolant temperature) sensor, even though the old one was ok.
4- I checked the temperature gage and it works even it is irrelevant.
5- the wire from the PCM to the ECT sensor is ok because I can measure +5 on the it when I disconnect it from the ECT sensor
6- the wire from the PCM to the fan is ok because the fan turns on when the A/C is on and even if I disconnect the PCM wire from the ECT the fan will come on, but once I connect it back the fan will turn off.
I ran out of ideas and I am about to the dealer, which I heat to do so.