So my car was broken down for about 5 months in the winter. finally got it running nice and pretty much perfect. Since I got it back on the road my heat or air does not work unless its just on the circulation setting. Also the rear defroster stopped working as well. Ive replaced the Blower motor resistor and the blower motor itself and still nothing. Ive checked every fuse and relay in the car and all appears fine. What are the odds of the Controls for the Heat/Air to just crap out? along with the rear defroster switch. I do have a multimeter so I could test some wires but I don't know where to begin with it.