What does it mean when brake lights wont go off?

If the brake lights remain on, the battery will flow. The most likely cause for the brake lights to stay on is the brake light switch that is attached closed. You can disconnect the brake light switch plug from the brake light pedal to see if the lights turn off.Your battery will be drained if your brake lights stay on. ... A closed brake light switch is the most likely cause of the brake lights staying on. The brake light switch can be disconnected to see if the lights turn off.