I'm working on a 71 340 Cuda with Rally Guages. I sent out my fuel guage to be checked for calibration. Before I sent it out all the other guages worked. When I got the fuel guage back I installed it and now none of my guages work (fuel, Temp. and oil). I've checked each hot lead and none of them have any power going to them. The black grounds are all attached and in the correct order. Any ideas whats going on?