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I found the problem! The #58 wire that connects to the fuel sending unit was severed. I found it right above the heatshield of the muffler/resonator. I repaired the wire and now it works. Im not sure how it was damaged in the first place.

I took apart the battery cables and cleaned all the grounds and terminals. I also cleaned the ground on left side of the back of engine. I see the ground wire for fuel sending unit #58 and cleaned it too. Then i moved onto the ground behind the gauges. I took that bolt out and cleaned it. I...

I will try all of these suggestions. I will report back with results!

Thanks for the welcome! I am good at replacing things but not so good at troubleshooting electrical issues. I do have a fluke multimeter but not sure exactly how to use it to see if wire #58 is grounded. Can you elaborate on that process please? I have not cleaned the ground points. I did see...

My fuel gauge is pegged past full. I've replaced the FSU with a new 24v unit as well as fuel gauge. It's still not fixed. I'm guessing the issue lies with a ground issue? I have looked in the TMs and can't find it. I saw the flow chart in the TM for how to diagnose this issue. All it said is to...