Grounding the instrument voltage regulator

I just went through this, and couldn't get the cluster out of our 71 Dart. So I reached up behind, pulled the limiter out, and made a pig tail and mounted the limiter in the drivers side kick panel.Grounded it, and created a new ign. wire to it from the fuse panel.
I also found somewhere between the plug in wire harness and the dash cluster the wire for the fuel gauge was dead. I cut the fuel sender wire there and added a new wire up to the gauge. I used female plug ends and plugged all the new wires directly to the gauge on the mounting posts. It works perfect.It feed the temp gauge too.
I am sure there is an issue with the traces on the board or the pins.But to much drama to pull it out. Maybe later.But yes, most the times it's the pins, which can be fixed with the cluster out.