Brake lights

Do the signal lamps work properly? Test the signals BOTH with tail lamps on and with tail lamps off. This will help you check a grounding problem

The brake lamps go through the turn signal switch. Access the switch connector at the column, and check for brake power at the proper wire (I believe it is white) by depressing the pedal.

If the signals work, and the brake light switch is feeding power to the column connector, then the column TS switch is bad

WIGGLE the heck out of the hazard switch.....as they are interconnected