No problem Jeff......just went out to the garage and tested.......
Park lights on....fog lights will turn on or off....
Headlights on....fog lights will turn on or off....
High Beams on.....fog lights will not turn on with switch.....if fog lights are on with low beam and switched to high beam....fog lights will automatically turn off and come back on when switched back to low beam....
IMO with these new headlights.....I don't feel the need for the use of the fog lights when using the high beams anyway as these are very bright.....very satisfied with the purchase.....