Unscrew the electrical connector at the switch, and then 45-degrees clockwise off and disconnect. The brake light switch has self-adjusting feature and when installing, one should not press the brake pedal. Install the switch into his holder and insert it into its bracket and then turn the switch 45-degrees counterclockwise to hold it in place. Install the electrical connector of the switch and ensure that the brake lights are functional before turning the vehicle into normal service.