Ford probe AC problem

recently recharged AC on 94 probe GT 2.5l. Had it full according to gauge,worked great for about 15 minutes.turned it off and restarted 10 minutes later not working. Rechecked refrigerant it was full. checked relay it is working and bypassed low pressure switch and still no power to compressor.there is a high pressure switch with 4 pin connector but dont know how to test that. any ideas. losing my mind quickly!!!Any help would be appreciated