I turned my a/c on and it was cold then there was nothing. I have power to the switch on the dash, it lights up. There is a red/blue wire that is hot and when I turn the switch on it lights up and makes the yellow wire hot. There is a black and white wire that does nothing. I tried to connect the black and white with the hot wire and it popped a fuse. I checked freon levels and they are good. If I run a hot wire frome the battery to the compressor it kicks on and runs good. At the compressor the black and white wire that goes to it has no power at any time. What should I look for? Are there relays somewhere. I know there is one fuse in the fuse box. THanks