The AC compressor clutch wont engage when I click on the AC button to turn on the AC. Ive checked all the fuses & relays they all checked out fine. When I checked the switch for power there wasnt any flowing through it, when I jumped the AC compressor clutch it engaged & was working. When I checked to see if there was pressure in the system there wasnt any pressure in the AC lines. Wondering if anyone knows what could be the problem.

 

Your on the right track. The a/c system has a pressure switch for safety to prevent compressor damage. So low pressure on switch it won't provide power for a/c clutch to disengage letting compressor operate. That sounds like the issue to me. Its possible freon leaked out to the point that the compressor wont run to prevent damage.