I purchased a used 2003 FXDWG with a Kuryakyn 7281 fuel and battery gauge. I am trying to calibrate the empty set point. After I follow the instructions, the gauge is supposed to cycle through battery and fuel sides. The battery side goes blank and back to the switch on position. The fuel side does not make any movement. Neither side cycles per their instructions.
The fuel tank is basically empty, the reserve is full on a stock 5 gallon tank which is 4 primary and 1 reserve. They are closed today. Can anyone help?

 

Unfortunately I'm no help, but post the solution please. Thinking about getting one for my 03 FXDL.