I have a 1994 Buick Century 3.1 with a problem overheating due to the fans not running. I have verified the fans do work as well as the fan relays. All wiring, relays, sensors, etc. Have been checked and are in good condition with no shorts. My AC compressor also does not energize. Again All wiring, relays, switches, etc have been checked.
I believe the problem is the PCM is not completing the Circuit to the Cooling fans relay coils or the A/C Compressor clutch relay coil. Also, I am not able to retrieve codes as two different code readers display they are not able to communicate with the PCM.
I have tried three different PCM's and still no results. The engine starts and runs very well otherwise.
Any Ideas would be appreciated, please.
Saturday, November 13th, 2010 AT 5:42 AM