salvage? thats were i got mine. should cut into the light wirings where the head light wires go inside the loom. not sure if its connected to the rear fog wiring, but i not that much
f**k PWJDM! Just get a OEMish fog light switch, or juts a switch, and then have 2 relays(one for each light) and wire it up. It is that easy. Don't buy stuff to make it easy for you, if you DIY you can save money and learn more in the long run.
its a little pricey, but i think thats better of trying to do the wiring yourself and having the possibility of f**king something up. and you can add a switch for $10 more.
The $20 one from Pep Boys is CHEAP and its EASY. It also allows for the fogs to turn on and off regardless if its on or not. It also allows you to use different switches.