OK, I have a 2004 350, and for me to be able to use my driving lights, I have to have the headlights on so the switch will pull out, and then the headlights have to be on dim. I see supordutys every now and then with the driving lights on WITHOUT the headlights being on. My question is, is there a modification to be able to do this, or did certain models have the ability to turn the switch on without the headlights being on, or did they more than likely not have the driving lights to begin with, and installed them with a seperate switch? Ive seen a couple of people whos truck description said fog light mod, so I was wondering what that was....anybody know what it is and what it does and how to do it??