Check the ground connection between the wing and the fuel sender ground. It is good for both fuel tanks. Originally I was going to install the 470 ohm resistor at the wing root, but decided to move it inside the left and right cockpit wall. I had to full the wires back into the fuselage. Install a #22 wire on the positive terminal on the fuel level sender using a ring connector. Pull this wire into the fuselage for both fuel tanks.
