Gas Gauge Not Working

[mquade6988]

I have a 2021 Parker 2320. The bars on the fuel screen recently quit working. I recently filled the gas tank so I know it is full. To the right of the bars the screen shows AVAL full. I unplugged the black and pick wires from the sender unit. The Aval light went off. I ran a jumper wire to the pink and black wires. The Aval light came on but the bars did not change. Any suggestions?

 

[warthog5]

Grounding the Pink wire [Key ON]
This tests the gauge and wiring leading to the gauge.
When the Pick wire is Grounded.....The gauge should swing to [FULL}

If Not.....You have defective wiring [check this First] A bad GND can cause this to the tank.

Or you have a Bad gauge....and in your situation [Yamaha all in one] It will need replacing.

Doing the Grounding of the Pink wire at the sender test and the Gauge does swing to FULL......and gauge does not read......Then you have a Bad sending unit.