CAN ANY ONE OUT THERE TELL ME WHERE THE TEMP PROB IS ON A OC12 I HAVE A GAGE ON THE DASH AND WIRES GOING TO THE REAR OF THE CAT BUT NO PROB THE ONLY PLACE THAT I CAN SEE THAT IT CAN POSABLE GO IS ON THE TOP COVER THERE IS A PLUG LIKE AND AIR VENT .IF THAT IS IT WHERE CAN I GET THE PROB A PART # WOULD BE GREAT THANKS LARRY