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Thanks guys. I ended up finding a ground plug disconnected right over the trans in the ground cable cluster and it looked like someone had cut another ground wire at the plug. I had to cut the wire cover back to get the end and solder a new connection. Once I pluged them both in all my gauges...

Thanks NDT. Found a good write up on supplemental grounds. Going to give it a try tomorrow

With the humvee running i am able to get the back lighting to work but no actual function from the gauges. Oil pressure needle jumps to 0 then stops. Nothing from volts or fuel. Tanks full and bats are new. I tried a new oil gauge just to see and it does the same thing. Thought it was...