THE SYSTEM HAS A GOOD FREON CHARGE AND THE PRESSURE SWITCH THAT CONTROL IT IS OK ALSO. THE PROBLEM IS BETWEEN THE COMPRESSOR RELAY AND THE ACC UNIT. THE FREON CHARGE/PRESSURE SWITCH IS ON THE OUTPUT SIDE OF THE COMPRESSOR RELAY. I NEED TO KNOW WHAT PIN ON THE ACC UNIT GOES TO THE COMPRESSOR RELAY COIL.