Check your brake light switch. It's about 3-4 inches up the arm of the pedal. Chances are that's the problem.
Make sure both bulbs are good (dual filament bulbs) check the brake light switch on the brake pedal. Also, if you are wired for a trailer hitch, the 4-5 wire module may be bad. Eliminate it and check the brake lights again.
Brake Lights not Stop Lights. Check your Fuses then the Bulbs. Hope This Helps.
It needs checked out but both the hazard and brake lights go through the turn signal switch.
Because something's wrong, of course. What it could be... bad switch, break/short in the wiring, bad fuse or relay, or even just bad bulbs.. chances are, your car uses dual filament bulbs for the brake lights, where they'll function as both marker lights (with one filament active) and brake lights (with both filaments energized).
Defective brake light switch.
There could be a separate fuse for the lower brake lights , or maybe both lower brake light bulbs are burned out
I hate to ask , but did you check the bulbs ? The tail light portion may work fine , but the brake lights don't if both of the bulbs are bad .
Check the tail light bulbs. These bulbs do double duty. Thet are both the tail light & the brake light. Tail light part might be burnt out.
check wire continuity- no power no lights
There are two elements in some bulbs. One element is for the tun flash, the other is for the brake or taillight. I also failed to mention that they are single element bulbs. It's 1 bulb, single element. It controls both the brake light and the turn signal. The turn signals work fine on both sides but no brake lights when I apply the brake.
check the fuses and check the bulbs.
Check the brake light switch it should be connected to the brake pedal somewhere.