New fuel guage, sender unit - still not working

[SkunkBoat]

Originally Posted by jjuriga

I have just replaced my dashboard and all gauges. Everything is working great except the fuel. It was broken before the project also...

I have a full tank of gas, the gauge has power and is grounded properly; all connections are new. Pink wire is attached and runs to the sender. I have a ground tab attached on the sender. Then the green wire(s). One coming from back and one going out. I have to trace these tomorrow, but am I correct in assuming that one heads to the engine or battery, the other to the fuel cap bracket? I have to open it up tomorrow... but I'm pretty sure the green one does NOT go to a neg terminal on a battery. Not sure about the ground on fuel cap bracket.

Its driving me nuts!!!

You need to ground the tank to the neg bus.

Test by jumping a wire from the tank to neg. Your gauge will probably work.
I just chased this down on my boat the ground of the tanks were off and fallen down and hidden.