I have completely rewired my 63 C10 and put on an aftermarket (speedway motors) turn signal switch. Everything was working properly until this weekend when the brake lights stopped working.
I have power going in and coming out of the brake light switch. I have power going into the turn signal switch on the proper line. EVERYTHING else works (turn signals, flashers, tail lights). The stop light fuse is good as well.
The only work I did recently was replacing the cowl vent seal. I know that is close to the wiring, but surely that could not cause any issue like this.
I am running out of things to check so any suggestions would be appreciated.