I have the JDM fogs and they look so much better than the USDM version. The kit comes complete with everything you'll need to set it up. It also comes with the switch so you can choose when to switch them on. Mine engage after I turn on the city lights. :thumbup: As far as placement, I removed my dimmer switch. I set the dimmer on high and then took it out to put in the fog switch. I got mine at inlinefour.com. Good price and speedy delivery!!