I just searched on another forum about bypassing the fader.
Really all I did was cut the plug, trace the wires and cut what was not needed. After that I was left with 8 wires. Which is where the 9volt battery comes into play.Use that to make the speakers click on to sort through the wires.
My package is out for delivery so I probably wont see it until this afternoon
The fuel tank should not post an issue nor anything since these subs are pretty powerful for their size