I was having the same issue. If you look at the bulb, the outer ring that snaps to the back of the fog light housing is connected to the bulb...you have to pull the plug out of the back of it. But you need a small flat head screw driver the release the clip. the clip is down inside of the back of the bulb. you need to take your screw driver and pry it up then pull it out. The issue I had came from that plug not plugging into the ballast from DDM. if you have gotten this far how did you make this work?