If you mean 3pm being way past full, if I remember correctly, the gage will do that when you lose the ground. There is a ground wire from the sender to the frame that comes from the top of the tank and towards the front of the car...one wire, find it and clean up the connection...a place to start anyway. And no, there is only one connector at the back of the cluster, it plugs into the circuit board for the gages/lights.