The driving lights on my last two Firebirds worked just the opposite. When you clicked on the high beams, the driving lights went off, and then back on when you went back to the low beams.
Yeah fog lights are now used as driving lights which is the reason you rarely see the amber/yellow fog lights anymore. I installed a pair of driving lights on my old Explorer behind the grill and hooked them up to the high beam relay, off a fuse of course, and the State troopers told me that that is the legal correct way to use them. If not they would have to be mounted as fog lamps and directed downward and to the sides. The driving lights lit up the dark country road where I live but now I am back to a car so.....no light mods yet.