I AM TRING TO FIND WHAT PIN FROM THE ACC UNIT THAT GOES TO THE COMPRESOR RELAY. MY A/C WORKS GREAT WHEN I JUMP THE COMPRESSOR ON AT THE COMPRESSOR RELAY, BUT I CAN NOT MAKE THE ACC UNIT TYPE 3 (HORIZONTAL BOTTONS) MAKE THE COMPRESSOR INGAGE. I NEED TO DETERMINE WHICH PIN ON THE ACC UNIT DRIVES THE COMPRESSOR RELAY ON. THANKS