Some help please. Am driving 2.2CDX vectra with OEM HID Xenon lights. For a while drivers side light didn't seem right as if light forming spot focus 10-15 feet slightly in front toward centre. At MOT test 2 months ago was told ok but casting odd pattern. But now for past week other side light suddenly very dim. Now seems as if driving with no lights at all!! Could this just mean new bulbs required or fault on system? If so any idea what could be fault?
Wasn't sure if like normal bulbs do they just go out completely.
Help / advice much appreciated.