I was checking to see why my a/c doesn't work, (new purchase, 1995 MM) it seems the compressor clutch isn't engaging when you push the switch, on following the schematics I noticed the coolant temp switch is included in it's path and on my switch it's contacts are gone (gutted) and the wire tie wrapped out of the way. Isn't this switch for the fuel injection and not the a/c? I'm confused.