Originally Posted by InterBlog
There was no more than 12 hours of operation on that headlight. We installed it June 30 and it was dead some time before July 19. But I barely drove during that period of deep south roasting.
I don't know whether this is due to bulb defects, or if the Sprinter's electrical system is causing the problem. I've got an email into Joel, and I will investigate this via Sprinter Forum as well.
INTERBLOG - Hard to believe that you actually have installed that many "bad bulbs". 12 hrs. is just too short for any bulb, even standard ones. If I assume the bulbs were not touched by bare hands, then you may have a loose headlight housing causing vibrations. Any recent front end bumper/fender bender even if no damage, or slammed front end on big pothole? That could easily cause loose headlight housing. Also check your connectors. They should be very hard to pull out. If too easy, either try spreading out if accessible. Or buy new connectors and splice them into wiring. Extreme case would be electrical issue with regulator. Not sure on your MY but the regulator usually is part of alternator. The filaments, especially the hotter & brighter you go, are already operating at their max. temps & current. If they are not burning steadily, but is subjected to fluctuations (regardless if caused by vibrations, connector contact, or alternator) will dramatically reduce its life.