Gauge Question

There is a instrument voltage limiter somewhere. Its either plugged into the circuit board backside of the inst' panel or inside a 3 post fuel gauge. It takes 12 volts in and supplies a pulse voltage out to the thermal gauges. This limiters 12 volt supply is not fused. Its supply comes directly from the ignition switch. The same blue wire from ignition switch supplies spark ignition etc... so this problem wouldn't be the ignition switch. It sounds like your limiter has suddenly stopped working.
So now my questions.... Does your fuel gauge have 3 contact posts?
If yes, did you remove this gauge any time during your mod work?
If your limiter is plugged into the circuit board, Did you remove it? If yes did you plug it back in along with the extra little male spade from noise cap' at middle post the limiter into the board? To leave that out can create a loose connection.