There's got to be a break in the system somewhere. Take your test light and start with the brake light switch (on the brake pedal) and keep working your way along the system until you locate the problem.
a crappy car. my 99 beetle has the same problem. brake light switch new, bulbs and fuses new. brake lights just work whenever the heck they want. this is one of the many reasons my car has a for sale sign in the window. good luck.
Check bulbs, fuses and brake switch in that order.
If the bulbs and fuses are fine, it must be your brake light switch attached to the arm on your brake pedal.
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
fuses are blown, or bulbs are blown
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