Re: HID flicker
Could be a bad bulb, could be a bad ballast. If it is the ballast, it may kill the bulb (or reduce its life) but doing that dimming/flickering. I would replace the HIDs with a quality kit that you know of or like, or better yet, get rid of them and use the traditional halogen bulbs.
2014 Jeep Grand Cherokee Limited 4x4
5.7L Hemi V8, Luxury II Package, Navigation
Hemifever Tuned, Billet Catch Can, 265/60R18 Hankook Dynapro ATMs