Installing Fog Lights in 99-03 S80s?
 

I have a switch on my dash for a fog light, it appears on the instrument panel also when I hit the switch. No fog lights in the car but would like to install them, I have not seen much online though. Anyone done it on here? Thanks for any help and info on what I need to.

I think you're refering to the fog light that pops up on the rear. You should have two switches side by side for front and rear fog lights.
I bought a volvo aftermarket for the fog lights. Its just plug the connects and push in a fuse and relay. But the dealer must program it to work!