1999 A/C Compressor Clutch Will Not Engage

When I recently tried to use my air conditioning the other day, I noticed that only hot air was coming out. I let it run for about 10 minutes and it never got cold. So I figured maybe I needed a re-charge. When I was going to test the refrigerant pressure, I noticed that the A/C compressor clutch was not spinning. So I tested the refrigerant pressure and it was way too high. So I let it out while the car was running until it was at the desirable PSI. The clutch would still not engage. So my father and I tested the voltage on the two plugs going to the compressor and all the fuses. The fuses were fine, and the pressure switch had the correct voltage; however the other plug going to the compressor had no voltage going to it. What could be the problem? I'm out of ideas :headscratch: