I've run HID's in the fogs for a while
 

Generic no-name brand HIDs that are made in Korea I believe. Cheap but they don't last. The bulbs last about a year and I've had to replace the ballasts once before but these are also DRLs so they're on pretty much all the time.

You'll have to cut the small covers to run the cables through and try to seal it as best you can. Check the bulbs and see if the widest part of the cable lines up with the notch in the H3 base. If it does you'll have a hard time getting the stock wire clips that hold the bulbs in to clip in.

I have my set relayed, a separate 12V line goes straight to the ballasts with a relay to do the switching on and off hooked up to the stock fog light wire in the housing (only on one side - single relay controls both lights). A flat quick disconnect lug will plug into the stock H3 wire. With the relay, I have no worries about extra load on the headlight switch or current going through the harness. They will be on full bright though if you do it this way but that only matters if you're using them as DRLs which don't run at full brightness stock. There's a set screw in the headlight housing that you can use to adjust the height of the beam after you install them to make sure you're not blinding oncoming traffic.

i have them on my car they work great but you might need to check the level

Any photos of the fogs in use at night? :)

Thank you for sharing all of that with me ShifTT
 

Good little write up. Did you have to take the headlights out to make it work or were you able to work it while the lights were inside?

Thanks you!

nope no need to pull the headlights
 

The fog lamps are accessible behind a small plastic cover. It will be tricky getting the metal clip over the new bulbs with wiring coming out. Helps to have flexible fingers.

There's also not much room on the driver side for the HID ballasts if you still have the stock airbox. I had mine stuck to the front of the battery box using double sided foam tape. There's room under the headlight housing for the ballast on the passenger side.

I don't think I've ever even turned the fogs on in my car. Guess that's city living for ya.