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Jup, Clamped a 10ga wire to the hex of the sender and then to batt negative. But you know, it could be it needs the same ground chassis ground that the gauge is using. I never thought of that. I should have tried grounding to the firewall or frame. I dunno, I'm doing the Big 3 anyway for other thngs like off road lighting, a big power inverter so I can run power tools off my truck, and a small winch for lifting motors, and adding a dual batter system too. Hopefully, I get all that done, if it is ground issue that will be resolved. If that doesn't do it, then I'm convinced it's the printed circuit, which I could confirm by Chegneys suuggestin by testing at the pins of the cluster. Taking his suggestion 1 step further, I"ll aslo test at the cluster plug in. If it is not good there, then I know the issue between the fuse block and the plug. If it is good there, but not good at the gauge pins, then I know for a fact it's the printed circuit.
