My panel is on the outside bathroom wall in the kitchen area. It’s pretty far from the G7 Mainboard under the bed. There would be no way I could fish a wire to where it located.
I actually looking at running wiring in this genersl area last year when I rewired the coach to use the Inverter to run any circuit. I had to go under the coach to do it.
The one thing you could do is inspect the actual connector on the panel side and mainboard side to look for a loose / bent pin or bad wire crimp there. You could also try to do a continuity test to see which wire is the culprit.
Otherwise the way Thor runs wiring it could be between an area that moves or vibrates a lot while driving and it wore through a wire. After being through the wiring throughout the coach I’m surprised we don’t see more wiring issues than we already do.
Good luck!
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