Need some wiring help - Light switch

[ymerej71]

I've lost power to the head/tail light switch inside the cab... I'm in the process of untaping / untangling a mess of of wiring job that someone left for me to sort out so that I can trace the wires.

Question #1: are the headlights routed through the main fuse box? If so, I can't figure out where... although I did find in-line fuses under the hood.

Question #2: Does anyone have a diagram of the harness to the light switch so I can tell what color goes where?

Thanks in advance for anybody who can help me sort this out!