To search for broken wires, the best is to test the continuity. Some wires break internally and might look good.
Do you have battery voltage at the Green/Yellow wire?
I do not understand the fuel gauge problem. If the connector to the sending unit is unplugged, the gauge should show Empty if the ignition switch is turned ON. You indicated it is going up past Full. This indicates a fault with the gauge or its wiring. Possibly the gauge ground is insufficient.
8 volts at the tank selector doesn't mean anythnig as the power is from the gauge and after going through the coil inside the gauge, it can drop.
Does the gauge show full when the selector is unplugged?
Use a 20 ohm resistor to ground the selector wire and check if the gauge shows any reading.
Wednesday, September 22nd, 2010 AT 8:41 AM