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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix. is the premier BMW Forum on the internet. Registered Users do not see the above ads.
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Old 05-14-2009, 01:12 PM   #1 (permalink)
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wtf lights

when i turn on my lights when the engine is not running everything works good but when i start the engine all the lights in the entire car flicker.... not like turn off and then back on but more like they dim and then get bright again and continue doing so. Has this happened to anyone and if not does anyone know what i can try. I hate electrical stuff and it's always almost impossible to find the problem.

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Old 05-14-2009, 01:21 PM   #2 (permalink)
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Could be your battery or alternator.

I stepped in a plate of Pasta the other day - now I have to worry about my Carbonara footprint!
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Old 05-14-2009, 01:59 PM   #3 (permalink)
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yep sounds like an alternator
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Old 05-14-2009, 09:02 PM   #4 (permalink)
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Bad news, good news

Bad news: you hate electrical problems

Good news of a sort: it's probably your battery, and that's not too hard to change. It's your chance to put in a group 34 redtop Optima. I have a 91 318 sedan with the battery in the trunk, and the Optima won't crap in your battery box.

My wife's 2004 325i recently had the flickering lights coupled with unable to start without jumping it. Solved that one with a Duralast 49 series -- longer dimensions than the group 34 but still can fit in the trunk battery box.

Good luck with it, and let us know how it turned out.
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Old 05-20-2009, 01:28 AM   #5 (permalink)
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Yep it sounds like a battery problem, but you should check the charge regulator on the alternator, it maybe damaged
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