How to fix my HID (high-intensity discharge) lights?

These aftermarket kits are often cheap quality. I have seen a few Hummers come into our shop with HID problems. The most common problem is the ballast. The aftermarket kits have a cheap ballast and many times are installed incorrectly and not grounded properly. This doesn't fix anything (and nothing will except to replace the whole kit) but at least can give you some insight as to what is wrong.