I have a 2003 Toyota Matrix. My airconditioner will not turn on. The AC light does come on. I have checked the fuse and it is good. I have checked the switch and it is good. I used my multymeter to see if power was getting to the compressor, but no power is getting to the compressor. Does anyone know if there is another sensor between the AC switch and the compressor. If there is are they hard to get to.