Wish I could tell you specifically,but I can tell you it is located in the ductwork.I suspect if you look under the dash,at the ducting,you will see it.The connector should have about 4 heavy gage wires going to it.Unplug the connector,and there are likely 2 screws that will remove it.The reason these are located in the ductwork,is they generate heat,and the airflow cools them off.If you find it,and once you get it out,I suspect the problem will be evident.Sorry I couldnt be more specific,but perhaps its a start.