My gas guage quit working awhile back. I turn on the ignition, and the needle move up to E, but doesnt go any higher. I've pulled the unit out and checked it for bad float, loose wires, etc. Everything looks ok, except the arm of the unit that rest against the wound wire to register the float position. There is a small hole in the center/forward edge of it: does a contact go there?? I stuck a test light to it and it does pulse. So, I'm at a loss. The gauge does move from below E but doesnt go past E, It's appearing to get power to the sending unit - but I want to make sure that it is the unit gone bad before I spend $100 on one. Any help guys