New FLU419 Owner, Electrical Woes

[rtrask]

Is this the three ground wires you are referring to?
I removed many things and didn’t see anything bolted to the cab. Wondering if at one point it was moved to the fuse block and is causing my problem with no gauges working.

This is not the one that matters to the gauges. The three wires mount directly to the cab. Trace the brown wire from the instrument cluster back until you find where it attaches.