I'm sure there a post about this but I'm new to this lol. So i installed hids into my h11 fog lights, they were working perfectly fine. Now my passenger side went out and I went and replaced the ballast nothing, i replaced the whole kit, the bulb light up a minute then it went out again. I tried reversing the polarity nothing. But I put in a stock h11 bulb in and it works fine. I'm just confused on what the issue is. Any help with this will be greatly appreciated