Check for a loose bulb Check for a corroded or bad light socket
Something is wrong with the Antilock Brake System . It could be a fuse , a sensor , or some other problem . As long as the BRAKE light in your dash is not on , you still have " normal " brakes
My 1991 Olds Cutlass Ciera had that problem and it was corrected by replacing the turn signal switch. Troubleshooting with the factory service manual pinpointed the problem. Paul S
Check the brake light bulbs, Check the brake light fuse, Check the brake light switch, In that order.
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.
Two filaments in the light bulb. One is the tail light, the other is the brake light.
That your emergency brake is on or that you are low on brake fluid or the brake pads are getting thin or some other brake malfunction
Yes. One switch is for the left and right brake light assemblies; and, the other is for the 'third' brake light.
Check the back signal light. Usually if the front blinks fast the back is out or need to be replace. Vice versa
Check the brake light fuse, the bulbs, the brake light switch and last, check the signal switch.
You need to check the wiring for power to the bulbs.
This is operating as intended. Brake lights are only activated when the brake pedal is pressed, irrespective of the other lights in use. It is a safety feature so vehicles behind are aware the brakes have been applied. They are separate from the tail lights so they still give a visual indication of braking whether the other lights are on or off.
Low brake fluid, pads worn down, other problems.