my wife's 99 Ford mustang has developed an ac problem. The compressor won't come on,we put a set of gauges on it and we determined it was stopped up. We evacuated the system and flushed then replaced the orifice tube and started to recharge after vacuuming. too much pressure and the pump still won't come on. we jumped out the high and low side pressure switches and it still won't come on no power to the plug that goes to the pump.At this point I am thinking there is a short in the wires but before I go to stripping them back I figured I would ask for suggestions on what else might be causing this problem.