02-06-2013, 09:37 AM
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Seek to understand,^Value
Location: San Jose, California
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Join Date: Mar 2008
Posts: 17,118
Mein Auto: 02 BMW 525i M54 automatic
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In addition to what QSilver7 said, I'd suggest you drive to Autozone or O'Reillys (or whatever you have where you live) and have them check the charging system.
I went to both, just in case, just this week for this thread:
> Detailed step by step diagnostic DIY ... dead battery ... parasitic current drain
Their test takes only about five minutes, in toto ... so it's easier than doing it yourself.
However, to do it yourself, as QSilver7 noted, you'll need to measure stuff:
- DIY how to test a BMW E39 battery & alternator
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