because the power comes from another source. the brakes have a switch located on the pedle that feeds the brake lights the signals are feed by there switch.J.R. Your light bulb's probably burnt out. Just take off the cover and screw a new one in there. Or you could have a short. If changing the bulb doesn't work, have an electrician take a look at it.
The brake lights and signal lights are tied together in the signal switch, also known as the "multifunction switch".
No brake lights but turn signals work? Turn signal switch brakes route through it.
If a 95 Chevy Suburban's brake lights do not work but everything else does, it may be the link that connects to the pedal that has a problem. If the pedal has been adjusted or disconnected, it may also be a reason for the issue.
the turn signal switch is probably bad
Fuse
If you have the same bulb for brake and signal, brake light power needs to be interrupted by the signal lights, The brake circuit has to go through the signal light switch so the problem could be there.
Replace brake light switch.
Since most brake/turn use the same filament in the bulb(1157) then if the turn signal switch is bad or offset then it will effect the brake lights.
Check and make sure you have the correct bulb. The turn signal/brake light is a dual element bulb and if you have a single element it does not work properly.
Answer Usually when the flasher blinks rapidly it's about finished. Try replacing the signal light flasher and see what happens. If you still don't have Brake Lights start looking for a short.
slightly apply the E brake
Tail lights. Brake lights. Backup lights. Signal lights. License plate lights.