Light Failure that isn't a failure - Bimmerfest - BMW Forums



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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 04-17-2017, 08:21 AM
u240018 u240018 is offline
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Location: New Hampshire
 
Join Date: Apr 2017
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Mein Auto: 2008 BMW X3
Light Failure that isn't a failure

For a while now, the bad light / light out alarm on my 2008 X3 has come off and on. It was erratic (alarm would come and go), and walking around I could never find a bad bulb. I got pulled over, and one low beam headlight was out. But I swear it wasn't out in all past inspections. Anyway, I replaced the bulb.

Within a week, the alarm came on again, and again I can't find a bad bulb. Usually I leave the lights in auto, and I have found that when I start the car and manually turn on the lights during the day when they normally wouldn't be on, the light alarm goes off after a minute or so and the alarm stays off... until the next time I start the car... but not all the time. If I leave the lights off, the alarm stays on.

Suggestions?
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  #2  
Old 04-17-2017, 09:23 AM
swampX3 swampX3 is offline
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Location: New Orleans
 
Join Date: May 2013
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Mein Auto: bmw++many
FESTCHIVE bulb failure link

>key item ....when checking the halo rings y'all gotta be back from car 15 feet plus or minus to get full image .....its the usual culprit when you can't find an obvious other bulb out ....best wishes

http://www.bimmerfest.com/forums/sho...1#post10035142
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Old 04-17-2017, 09:28 AM
u240018 u240018 is offline
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Location: New Hampshire
 
Join Date: Apr 2017
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Mein Auto: 2008 BMW X3
but...

...but if there is a bulb failure, in daylight conditions when the alarm is showing at start-up, why does the alarm clear if I manually turn all the lights on for about a minute?

Will look. For the 100th time.
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  #4  
Old 04-17-2017, 09:31 AM
swampX3 swampX3 is offline
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Location: New Orleans
 
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Mein Auto: bmw++many
cold / hot electrical impacts resistance

>could be as simple as the different temperature's throwing off different resistance reading when you switch or change parameters .....

>read the posts and get the easy CL readout or download in the bentley manual etc rheingold for free and get the list
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