I have no High Speed Fan function. When tracing the wiring I found a plug end disconnected [See pics ] I have removed the ECM and wiring from the car carefully I thought. I understand that the ECM does not control the A/C . I kept the old ECM engine harness but have not found any corresponding connection to the one in questions. I see that the plug in question contains the Red Hot feed wire for the High Speed relay, A light green and darker green which runs to the A/C pressure switch as well as a black wire. I have looked at some wiring diagrams on the car and do not see any mention of the connection or a control relay if one is used. I am hoping that someone here has knowledge or experience with the A/C circuit. Oh yes the car has a 3.8L V-6. Any help is greatly appreciated ! Thanks