Bimmerfest - BMW Forums - View Single Post - Z4 Xenon headlights out!?!
View Single Post
Old 10-13-2012, 12:10 PM
WestCDA WestCDA is offline
Officially Welcomed to the 'Fest
Location: Calgary, AB
Join Date: Mar 2011
Posts: 250
Mein Auto: 2006 Z4 3.0si
You're asking for a guess based on pretty limited information. Troubleshooting is a lot easier done with a meter, than relying on speculation.

How long between one light failing and then the other? You 'believe' the bulbs were replaced - were actually replaced? If so, did that fix the problem temporarily or have no effect?

Switched power goes to the headlight ignitors and from there to the bulbs. You've got a bad switch, bad wiring, bad connections, bad ignitors, or bad bulbs. If you've got power to the ignitors, and the bulbs were replaced without effect, that gives you a good starting point. Someone needs to check the circuit - carefully, as they operate at extremely high voltages.
Reply With Quote