Just noticed today on my 2005 Grand am that my AC compressor runs as soon as the blower motor is selected to any position besides off (ie 1,2,3,4 or 5). The AC switch position has no effect, I tried swapping the relay under the hood with the horn relay and no change. I disconnected the pressure transducer plug up near the rad support and that will cause the compressor to disengage but that seams to be normal to me. Is there any other switches or relays that anyone may know about in the system? Any help much appreciated.
