If it's wired in with the stock fog light harness, it would be automatically turned off like the stock fogs..
If you wire it direct, I suggest two things, a lighted switch when on and turn around and admire your rig as you walk away. Face it, you want to look at it as much as possible anyway, give in to your pride.

Bravada G80 3.73 converted to selectable 4wd.