How do you change a brake light switch on a 406?

To change the brake light switch on a Peugeot 406, first, disconnect the vehicle's battery to ensure safety. Locate the brake light switch, usually situated near the brake pedal assembly, and disconnect the electrical connector. Remove the old switch by unscrewing it or twisting it out, then install the new switch by reversing the removal process. Finally, reconnect the electrical connector and the battery, and test the brake lights to ensure they function properly.