That switch works off the Cruise Control Stock. Once installed you just pull the cancel button on the cruise control and it is activated. I was going to get that one, but decided to put my own on the brights flasher. But in doing that, you loose the ablility to use the brights while the head lights are off, so you would have to turn them on to use them. So Coastal Techs would be a great idea if you don't want to loose the brights.