check the brake light switch that is on top of your brake pedal under the dash, could be out of adjustment or bad.
The bulbs are burnt out.
there was a recall on the brake light switch you might want to check into that
have you checked your fuses?
No brake lights but turn signals work? Turn signal switch brakes route through it.
Bad switch.
Blown fuse, both lights are burnt out, There is a wiring or ground issue.
Rear loom ground not contacting. Bulbs burned out or missing. Brake light switch or connection to it is fubared.
this tells you is a simple wiring problem.most likely a loose wire from the third light to the other lights.(third lights provides the power to the other lights)
First thing I'd check would be the fuse for the stop lights. If it is okay the next thing I'd check would be the stoplight switch located under the dash where the brake pedal is suspended.
Bad socket? Bad ground? Problem in steering column switch?
brake switch ???
I'm not exactly sure which fuse it is, but it doesn't sound like a fuse to me. I would check the switch on the pedal, just simply short acrost it from terminal to terminal with a screwdriver, if the brake lights come on, the switch on the pedal is bad, if they don't then it probably is a fuse.