I dont know about your other codes but the one about the AC switch circuit being open could be because you have the wiring for the AC. I had a code similiar to this on a dodgey dodge. The car had no ac but it had the wiring. Hope this helps.
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'95 GT convert. K&N, C&L mass air meter, Performance distributors sreamin demon coil, dyna mod, live wires, king cobra clutch, flowmaster american thunder exhaust, UPR billet adjustable shift handle, Crane Cams Fireball HI-6 box,underdrive pullies, 255lph fuel pump, UPr short throw shifter, caster camber plates, 03 cobra lower A arms, bullit suspension, cobra front brakes
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