AC Compresser issue

Its a 5 pin relay. When I connect 30 to 87 the compressor kicks on. Are you saying that 30 to 87a should keep the compressor on and 30 to 87 should turn the compressor off.

would you be able to post that diagram

Thats exactly what I thought about trying, using an external ground. I will do it tomorrow and let you know what happens

I did some testing and the results are pretty strange. With car on and AC on I only get voltage on one side of the low pressure switch (2 pin). This is strange because I replaced the low pressure switch when I replaced the accumulator/ drier. I tried to complete the circuit with a paper clip inside the connector but still not getting voltage on the other pin. Then I basically bypassed the connector by linking the two back probes with test leads, but still don't get compressor to turn on. I thought I had two issue because even after link the connections by connecting test lead to back probe, I am still not getting voltage inside the connector on one side. So assumed I have a bad connector. Then to my surprise I don't see voltage on either pin on the high pressure switch. I apply power to one pin but I don't get voltage on the other one. When trying to complete the circuit on the high pressure connector with paper clip, I still don't get power on the other pin. I highly doubt that I have 2 bad connectors. I basically bypass all the connectors going to the PCM but still can't get compressor to turn on. I was also able to get the compressor to kick on if I use the battery ground for the relay instead of the PCM. Anybody have any ideas. I'm ready to just get a junkyard PCM and if that doesn't work I'll just rig up a switch.LOL. But it is really bothering me not knowing what is causing this problem.