What does it mean when your brake lights stay on? When you release the brake pedal, there is a switch underneath the brake pedal that disconnects the circuit to your brake lights causing your brake lights to switch off. Sometimes this brake light switch will go bad and need replacement. For the most part, replacing the brake light switch is very simple. Just replace the brake light switch with a new one. If your brake light stays on after you turn your car or truck off and you don't want to run your battery down, you may be able to get down underneath the brake pedal and manually pull up on the brake light switch to deactivate it until you can get it repaired. This method will only work if the brake light switch is just sticking. Otherwise you will need to open the hood and disconnect the negative terminal of your battery each and every time you leave the vehicle unattended to keep the faulty brake light switch from draining your battery.