No brake lights, WTH?

Okay, Im normally pretty good at figuring this crap out but not this time. I have a 76 Dart swinger with no brake lights! I installed a new brake switch on the pedal, new flashers under the dash, checked the grounds, wires etc. All the marker lights work. All the turn signals work front and back. The hazard flashers only work on the front. Maybe turn signal switch??? Any help is much appreciated, Thanks