1987 RC AC did work last year, no worky this year. The pump is not cycling, tried a jumper on the low pressure switch, and nothing. Ran jumpers to the pump wiring and the clutch engages, therefore the problem must be the dash switch. My question is: is the whole dash switch bad, or do I have a ground problem? The dash switch was replaced last fall when it wouldn't switch to defrost or heat. Ideas?