Rich, were you able to get pressures while compressor is engaged? As far as the hp switch is concerned the fact that you have power at the hp switch connector doesn't mean the hp switch contacts are closed. You can place a jumper across the hp switch connector then if compressor clutch engages, pull jumper out quickly and observe compressor clutch disengage. This will tell you if the hp cut out switch is faulty. Or, system pressure is above normal & hp cut out switch is functioning as designed. It is there for over pressure protection. There should also be a relief valve for over pressure.
2003 SSEi, Light Bronzemist Metallic - All Stock For Now
IBEW Local 261 Groton, CT
My other vehicle is a nuclear submarine.