so ive changed the brake pedal switch, ive changed the junction box under the rear bumper, all fuses and bulbs are brand new, my flashers, hazards, reverse lights all work, my parking lights work also, but all 3 brake lights are out and i have power and ground at light sockets, any idea what i am missing

 

bad bulbs...?

 

Did you ever figure out what the problem was? I have the same except cargo braking light works. New bulbs , fuses good and brake light switch new.

 

Possible damaged wires under the truck