I HAVE A 2001 DODGE GRAND CARAVAN, WHEN I TURN THE A/C ON, THE CLUTCH ENGAGES JUST FOR A SECOND AND THEN IT STOPS AND IT REPEATS EVERY 5,6 SECONDS AGAIN. IT DOES NOT COOL AT ALL. I HAVE CHECHED THE FREON, THE CLUTCH RELAY AND THEY ARE GOOD. PLEASE HELP THANKS JOE