I recently installed a DDM Tuning slim kit with the digital ballast in my CTS, which has an option for HIDs but came with halogen lights in mine. The housing, however, is the same, as there are projector optics and part of the molding is used to mount the factory ballast.
Anyway, what happens is that the right light doesn't come on, although it does flicker on whenever I turn the low beams from off to on, every time. The left light works perfectly. What could the most likely cause be? Failed ballast?