Hey, Just throw couple of idea's and opinions at you. Ask this question at your local supercheap auto or autobahn etc, they'll have all equipment and tools for you to do this :) (plus, they'll know proper way to do it) From my understanding, you want to have your fog's on permanently, personally I wouldn't recommend this because you never know if you just might want them off while your car is stationary or your experiencing battery troubles. The other thing is, is the switch between accessories and your car being actually on. My suggestion would be to use one of the spare switches on your dash to make a complete separate switch from your headlights this way you can control when and what lights are on all the time! :) Hope my opinions and idea's have helped!