2015 T660. Reverse lights

[Mattman]

I found my trucks troubles.

Wires going to chassis node had rubbed thru their insulation and corrosion had set in. .
I blame it on dirt getting inside the wire look and grinding on the insulation of the wires.
Everything seems to be working as it should now.

I didn't have a wiring diagram, just started checking wires. Looked like a likely area for something to go wrong seeing as how they have the wiring making some really tight bends.