[72c20customcamper]

I believe the printed circuit board went on my 85 as the fuel works sometimes and the others not at all . I would like to install a fuel gage in place of the volt gage in this gage pack . My question is what wire in the harness running to the plug at the printed circuit board is for the gage . My thinking is if I get a new gage and tap into the wire I should be able to run one aftermarket gage for both tanks . I plan on doing the circuit board this winter and fix it properly then