1979 Bronco Ranger XLT, 400m engine, C6 trans, D44 front with Dick Cepek manual hubs
can make sense
but the brake light circuit is a different one, there are 1 or if the car had cruise control 2 different switches around the brake pedal lever.
I had big problems with my hazard circuit, it was simply not working, even blinkers and brake lights were doing this perfectly.
I ended up installing new electric part in the steering colum, that has this connector at the end from above picture, There are 3 different ones existing, so maybe the PO installed a wrong one?
When I finally got the correct one, everything was working no problem.
and yes tracing wires mostly make sense one at a time.
Looks like a nice project truck, lucky not to have it too rusty, only surface.
But why not install the grill? The mesh does somehow look like a cheap farmer "fix" - if fix it the correct word....