Take the electrical connector off of the brake light switch, then turn the switch a tiny bit counterclockwise to remove it from it's holder, and pull it out. First, insert the switch into the holder, then push until the switch body contacts the rubber stop on the brake pedal bracket, rotate the switch 45 degrees clockwise so the switch will lock into place automatically, at the same time it will reach proper clearance to the rubber stop. Place the vehicle in normal service only after plug in the electrical socket of the switch and then confirm that the brake lights work well.