What causes the brake lights of the 2013 Mondeo to stay on?

[LaAaliyah]

Ford Mondeo's brake lights staying on may be due to the following reasons: 1. Insufficient brake fluid: It is an indispensable part of the car's braking system. When the driver presses the brake pedal, the force applied is transmitted by the piston in the master cylinder through the brake fluid to the wheel cylinders at each wheel, causing the brake pads to contact the wheels and stop the vehicle. 2. Poor contact or failure to reset after loosening of the brake switch: Check if there is poor contact or a short circuit in the brake wiring; inspect whether the brake pedal pad is intact, whether the brake rubber ring is severely worn, and whether the brake switch is damaged. 3. Severe wear of brake pads: If the brake pads are severely worn, the light may stay on, requiring replacement of the brake pads.