[JSeery]

I'm surprised REBEL provided any information related to flatheads! The gauge may have been damaged with the previous wiring setup or may not have worked in the first place. try running some dedicated wires directly to it. In you earlier post you believed that the Bar was the ground side of the gauge, don't think that is correct. All of the gauges are connected together on the power side and then the grounds provided through the other terminal. The Temp, Fuel & Oil Press are grounded thought their sender units, the volt meter is grounded directly. So, based on your earlier post sounds like you have it connected backward.