Here is how the fog lights should work in the U.S.
When the headlight switch is all the way to the left, No fogs, front or rear.(DRLs are on if the fuse is still there.
Middle Position: fogs will work and rear fogs will only work if the front fogs are on.
Right Position: Front fogs will work. Put the high beams on, front fogs turn off, but return when you turn off the high beams.
Rear Fogs will work with either front fogs on or off.