Blown fuse or bad brake light switch?
this tells you is a simple wiring problem.most likely a loose wire from the third light to the other lights.(third lights provides the power to the other lights)
Check your brake light switch at hte brake pedal.
brake switch ???
change the brake lights check the fuse check the brake light swtch
fuse, bulbs
BAD BRAKE LIGHT SWITCH AT TOP OF BRAKE PEDAL
Check for a brake light fuse
Check the brake light fuse. If you have 12 volts at the brake light switch I would suspect the signal light switch is at fault.
check the fuse for the brake lights, they have thier own. also check the brake light switch at the at the top of the brake petal
Yes, or a bad brake switch, a wiring problem, or bad bulbs.
a blown bulb or loose wire.
The most likely cause is a bad brake light switch (if none of the brake lights illuminate) but if its only one of the brake lights, try changing the bulb. Even if they still work as running or turn lights because they have a double filament and may still work partially, but not as brake lights.