If you can't get the dealer to enable the fog lights in the body control module you would be changing the switch uselessly. I prepared all mine and the dealer wouldn't touch it to enable the fogs, so I went about it an other way. My switch in my 16 just push out from the back, I removed the little card tray and poked my hand through the hole and pushed it out, don't know if 17 is different.
I put in a relay box. My fog lights come on automatically when the ambient light sensor detects darkness, they turn off with high beams because here it is the law. I can turn them on by turning the park lights on. They also come on if I remote start the Trax. Never "ON" when not needed.