65 Dart. Brake lights and dome light stay ON....Why ??

Brake light and horn problems at the same time? I would suspect the turn signal switch! Wiring for them goes through It. Dome light wiring goes through the Headlight switch AND the brake light switch. I would suspect the brake light switch or possibly one of the door switches where the wires are touching. If you need a turn signal switch SlantSixDan had a run of exact reproductions made; contact him and see if he has any left (I bought 3 of them!). Good luck and let us know what you find.