All my gauges work with the ignition on except for the fuel gauge , which the last one on the purple wire off the ignition. If I wire the fuel gauge directly to the 12 volt battery with nothing else the on the battery , the gauge will work and only then does it work. I know its a grounding issue and can not find where the problem really is. I did notice that the toggle switches that follow the fuel gauge on the purple wire , went dark and the fuel gauge would work. If the switches work -the gauge didn't. I haven't been able to duplicate that on demand or again. So if I had a separate 12 volt battery wired to the fuel gauge it would probably work.
