Lighting problem

Did a bunch of testing and tracing today. The fuse labeled brake/lp, thats wired in with the ignition system to the steering column and to the ballast resistor, ignition box, and alternator. (ignition 1 in the diagrams)

Everything I tested seemed ok, besides possibly the 4 way flasher switch. Can it cause the brake lights not to work?

Still haven't figured out the running lights and cluster lights.