How do you fix brake light switch in citreon xsara 1.4 2001 model?

To fix the brake light switch on a Citroën Xsara 1.4 (2001 model), first disconnect the battery to ensure safety. Locate the brake light switch, typically found near the brake pedal arm. Remove the old switch by disconnecting its wiring harness and unscrewing it from its mount. Install the new switch by reversing the process, ensuring it is properly aligned and secured, then reconnect the battery and test the brake lights.