Check all the fuses. If not bulbs or switch that's all that it can be,
Brake pedal switch, wiring, bulbs, bad trailer harness (if there), fuses...
If the bulbs are good then the problem is more than likely with the brake light switch.
Fuse, brake switch, bulbs. Replace whatever the problem is. There is no way to know without being hands on. Bulbs most likely answer.
fuse, bulbs
Check the brake light bulbs, Check the brake light fuse, Check the brake light switch, In that order.
AnswerThe bulbs for the brake lights are usually separate from the normal tail light bulbs. Check and replace the brake bulbs first, and if they are still not working examine the fuses, switch and wiring.
Check the fuse, check the bulbs, check the brake light switch, in that order.
Check the bulbs. If these are OK it could be the switch on the brake pedal arm.
Bulbs? Sockets? Steering column switch?
You need to check the brake light switch if the bulbs are good. They had a problem with the circuit boards that the bulb are inserted in. If none of these are the problem then if you do not have a short, your turn signal switch is bad.
replace the relay under the hood Also check brake lights switch had the same problem switched bulbs and worked fine
Check bulbs, fuses and brake switch in that order.