Here is the how-to that I used How to modify the Headlight Switch to allow Fog Lamps to come on with Parking lights and Autolamps I like this one cause it gives you the option whether or not you want the fogs on and by modifying the switch how they show it feels and functions just like it should have from the factory. Once you modify the switch all you have to do is splice the 2 wires together and your done, piece of cake. If your truck is a 99 I believe you have to do it a different way but if not the how-to above should walk you right through it.