A/c system currently has no refridgerant in it. The system has a leak which is most likely the evaporator, but will put dye in and check for leaks before tearing everything apart. There is another issue however, jumping the low pressure cut off switch by the firewall should allow the compressor to run as if there is refridgerant in it, but it's not running when I jump the switch, leading me to believe that there is another issue. I checked the compressor and clutch, relays and fuses, and the ECC module, all are working properly. When I pull the connector off of the high pressure switch(located between the ECU box and rad support) then put it back on, the compressor kicks in for about 5 seconds and then shuts off, but doesn't kick on every time. I'm thinking that the HP switch is bad. There are three wires out of the connector, numbered 1,2,3. Does anyone know which pins to jump to temporarily bypass? Or how to test the HP switch?
Vehicle is 2000 V70R