Check brake switch on the brake pedal it may be stuck or broken. sometimes a little wonder juice ( WD40 ) will make it behave. An easy check would be to jump across the two wires and if the lights come on its a bad switch.
fuses are blown, or bulbs are blown
If the bulbs and fuses are fine, it must be your brake light switch attached to the arm on your brake pedal.
Check bulbs, fuses and brake 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.
Working brake lights are important for safety reasons while driving. It is important to check all of the wiring, if the brake lights are not working and the fuses and bulbs have been checked.
Bad bulbs or brake light switch.
on some cars the tail lights and brake lights are totally different bulbs gain access to the bulbs and have someone push the brakes so that you can determine which bulbs are the brake lights and replace the tail lights
Brake light switch on the brake pedal is defective
check that you have double filament bulbs in tail lights
check fuses, and then check for power to the bulbs check for power in and out of brake switch
check the bulbs to see if there burnt and check your fuses
Check the fuses and the bulbs.