Guys,
What about cutting the brown/yellow wire from the headlight switch to the fogs, run a keyed 12V source from the fog light fuse to a blue lighted on/off rocker switch (dash mounted), run a wire from the new switch to the brown/yellow wire going to the fogs, tape the other end of the brown/yellow wire from the headlight switch? This should supply a non-logic 12V to the fogs. Just don't pull the fog/headlight switch on-you should be able to use the fogs:
1. By themselves
2. W/parking lights only
3. W/lo beams
4. W/hi beams
just by flipping the rocker switch on. Please check this out, those of you who are electrically gifted. I'm not. I was a Mechanical Designer for 38 years.