What causes the brake lights to stay on in a 2013 Mondeo?
2 Answers
Ford Mondeo's brake lights staying on may be caused by the following reasons: Low brake fluid: It is an indispensable part of the vehicle's braking system. When the driver presses the brake pedal, the force applied is transmitted by the master cylinder piston through the brake fluid to the wheel cylinders at each wheel, causing the brake pads to contact the wheels and stop the vehicle. Short circuit: Check if the brake switch has poor contact or failed to reset after loosening; inspect the brake wiring for poor connections or short circuits; examine if the brake pedal rubber pad is intact; verify if the brake rubber ring is severely worn or if the brake switch is damaged. Severely worn brake pads: The light may also stay on if the brake pads are excessively worn, requiring replacement.
I've been driving a Mondeo for almost 20 years and have encountered similar situations. The brake light staying on is most likely due to a problem with the switch under the brake pedal. That thing often gets stuck or has poor contact, causing the light to stay powered. Another common issue is aging or short circuits in the wiring, especially if the door switch circuit isn't properly closed, sending continuous signals. Additionally, a blown fuse can also trigger a false alarm. This problem is quite dangerous—when parked on the roadside, the car behind might not see clearly, leading to a rear-end collision. It also drains the battery; leaving it overnight can deplete it. I recommend first checking if the pedal returns normally. If not, head to a 4S shop or a professional repair shop immediately. Older car parts wear out faster, so regular maintenance of the lighting circuit can prevent issues.
