The just fitted a used old Porsche 911 gauge that I had in the corner of the garage for a long time, it measures 285 mm and has a witness a terminal for the fuel warning light so I polished them wire with abrasive 3000 and control ohms by moving the float everything seems ok and progressive, I have not yet connected a third electric wire with a pilot on the dashboard for the moment.
n° 90174180100
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I had already polished the wires of the original gauge with polish without much result several years ago, I found the entire gauge loosened once removed from the tank.