Why do the brake lights stay on when the car is turned off?

[VonAndrew]

It is likely due to a faulty brake light. Here is the relevant information: The principle of brake lights: In simple car models, power passes through the fuse to the brake switch. When the brake pedal is pressed, the switch connects, sending electricity to the two brake lights and a high-mounted brake light, completing the circuit through the negative wire connected to the car body. The function of brake lights: Brake lights are bright and highly visible, primarily used to alert vehicles behind that the car is slowing down or stopping. If brake lights are used incorrectly or malfunction, they can easily cause rear-end collisions. Check the brake fluid level: Insufficient brake fluid can cause the indicator light to stay on. Also, inspect whether the brake switch has poor contact or is loose and not reset, and whether there is poor contact or a short circuit in the brake wiring.