[JellyBeanDriver]

Or one of the parking light feeds from the fuse box. This burned up on our ranch truck - orange wire from the fuse box up to the switch.
I ended up unwrapping a lot of the harness and pulling out all the burned/melted wires. In our case it was a gooseneck trailer short that took out the parking light wiring plus this feed. Poor quality fuse that didn't blow didn't help either - started a fusebox fire.

Quite a mess to clean up.