I have a 2004 TB with fuel gauge reading empty. I removed the dash cluster and had it completely rebuilt with all stepper motors. The board was cleaned. Fuel gauge still reads empty. Next replace fuel pump assembly and before I installed pump into the tank, I plugged sending unit into to harness to check operation and the gauge reads the opposite of what it should read. When the float is down it reads full and as I raise the float up it move towards empty. The pump turns on for about two seconds and cuts off. Is there a ground issue? All the wires appear to be connected correctly. Any help please.