No Brake Lights 1969 Dart(Different than post underneath)

1969 Dart
Ok I have no brake lights. The turn signals work, also the flasher does not work.
So far I have replaced the flasher relay (drivers side), the flasher box itself (passenger side), and the brake pedal switch. All to no avail, I am still having problems with brakes and flasher, If I pull the light knob to turn on headlights I am getting power back there, ei. they turn on. Also I noticed if I shut turn off the key, flip the flasher switch powered on, then turn on my left blinker the flashers will go off.
I also pulled out the backseat, and sill plates looking for a busted/cracked/etc wire. Everything looks fine.
Thanks for your guys' time.