Sometimes when a person steps on the brake and then just slides their foot off, the peddle snaps up so quickly it hits the switch and moves it. When this happens, the switch may be right on the brink of going on. If it is acting up, put your foot under the peddle and pull up while you try the cruise again. If that helps, grab the switch and adjust it toward the peddle slightly. The switch is made to auto adjust after installation by pulling up the peddle until it hits the end of travel. There are no nuts to adjust.