2009 Fuel Gauge not working properly

[tom4949beach]

I am trying to find a wiring diagram for fuel sending unit in my 2009 4runner. want to find the ground wire to test if there is a faulty ground connection before having to take it to a mechanic.

Any ideas or suggestions would be appreciated.

 

[Bluesky 07]

I am trying to find a wiring diagram for fuel sending unit in my 2009 4runner. want to find the ground wire to test if there is a faulty ground connection before having to take it to a mechanic.

Any ideas or suggestions would be appreciated.

Odds are it's the known issue of wear on the fuel sending unit arc where the arm travels up and down with the float. It's shown in my post about this issue and the YT video linked at the bottom of that post should also be helpful. Video isn't mine but I included it in the post b/c the guy does a deep dive into the workings of the fuel system.