Ya when you DRL is on the fogs are off because the Lamps are off, when you turn the parking lamps on manually the fog turns on with it. When you get the Split fogs you take the plug with the turn sig/ parking lamp and it will plug perfectly into the turn sig part and will turn on. The fogs wont thats why you have to relay them into the the parking lamps and that is easier with HIDs. When you are set and done you get a bright output. Hope this goes well for ya