I don't exactly know what you mean by that, but I guess maybe because whenever you stop the car, the brake light comes on so other drivers know that car is on their brakes. I hope that helped a little ;)
The brake light switch has failed
Brake light switch is stuck or out of adjustment.
Your brake light switch under your pedal is brobaly stuck
Brake light switch is stuck or defective.
This either means that your emergency brake (hand brake) is on, the light switch needs to be fixed, OR (most common) you need to add more brake fluid. Always check your brake fluid first!
If a 1991 Chevrolet S10 Blazer warning brake light always stays on, it could just be a malfunction of the light. To reset it, disconnect the battery for 10 minutes.
You may be low on brake fluid or the parking brake linkage needs adjusting.
There should be a fuse for the brake lights. If the fuse is good always check the ground wire.
One post should always be hot.. verify that with a test light.
burned out bulb maybe brake light
This is most likely the Brake Warning Light. It's usually obvious because it says BRAKE under it but perhaps not always. This indicator light is usually located bottom center of the tachometer gauge.
yes they have brake lights and you probably have a bad brake light switch which is on top of the brake pedal under the dash.