Check your fuse box, Your brake fuse is most likely blown.
Next step would be to check the fuses
fuse, bulbs
Try replacing the hazard flasher. If that does not work, double-check to see that you have the proper bulbs and fuses installed for the brake lamp circuit.
Check all of the three bulbs try replacing with working bulbs this should resolve the issue unless you have a bad module.
The bulbs are burnt out.
The brake lights and tail lights are separate wiring systems. Even some of the bulbs may have two separate bulbs in the same glass housing. If the bulbs are in fact working, then the next step would be to test the brake switch under the dash. When you depress the brake pedal the switch is pushed creating a connection to turn on the brake lights.
use a test light and check for power at the bulbs. if you have power then you want to be checking for a bad ground. If no power trace the wires and look for shorts/breaks. hope this helps!
bad bulbs, bad fuse, or brake light switch on the metal arm of your brake pedal under your dash.
Check the bulbs, fuse & brake light switch on the pedal.
Check the bulbs - they are doubloe filamented with the smaller being for brake/turn signals Check the fuses
u have a short in ur wireing.
Check the tail light bulbs. These bulbs do double duty. Thet are both the tail light & the brake light. Tail light part might be burnt out.