HOW DO I TEST MY DASH MOUNTED ELECTRICAL FUEL GAUGE?

To test your gauge, turn the power off and the gauge should read below empty. Disconnect the sending unit wire from the gauge. Apply power to the gauge. To do a quick test, use a jumper wire and momentarily connect the sender terminal on the gauge to the ground. The needle on the gauge should go past the full mark. If the gauge passes these steps, the gauge should be operating correctly.