I downloaded the wiring diagram for the 87 Avanti. It covers everything except the HVAC system. Since the system was Chrysler and not Monte Carlo I need to see how it was wired. My AC clutch is not engaging all of a sudden. The clutch works it you jump it. There is no pressure switch in the system as well. Then fan comes on, but not the clutch when you push the AC buttons. Does anyone have a correct diagram?