THE SHOCKING REASON WHY BMW XENON LIGHTS FAILED - YOU WONT BELIEVE THIS ONE SIMPLE CAUSE!

BMW xenon lights fail at times and in this video the left side failed on this E60 but the cause was something far simpler than even the bulb! Check out how I diagnosed and repaired this headlamp issue. Outro - Sport Rock | Let's Rock by Alex-Productions |    • Sport Rock Background music for video (No ...   Music promoted by onsound.eu/ Contents:- Learn more about xenon bulbs, ballasts and LIN bus! 00:00 Introduction 00:22 Xenon headlamp system layout 01:29 D1S xenon bulb and how it works 02:04 The ballast unit 02:24 Basic fault finding "too many failed ignition attempts" 03:23 Diagnosing the LIN bus and fault code 006140 04:00 First LIN bus voltage measurement 04:18 Measurement after repair 04:34 The headlamp module 04:52 LIN scope traces 05:22 Conclusion 05:38 SMC module close-up of a shorted one 05:58 Why the headlamp module turned off the left headlamp?