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Old 08-05-2011, 03:14 PM   #6
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Join Date: Aug 2006
Location: NJ
Posts: 23,670
My Ride: '99 328i 300K miles
Originally Posted by 2003 325i View Post
^ What this guy said. In sleep mode you're under 50 mA of draw so you have no real parasitic current draw present. I'd look at charging voltage with that Fluke meter you have. Run the car with the meter at the battery (or underhood terminals) and view the charging voltage, should be low 14s or high 13s V. If it is, load up the alternator, turn on headlights, rear defrost... make sure it's doing it's job. If it's not charging then check fuse(s) in the charging circuit, wiggle wiring to it, check connections. Check to make sure you have battery voltage at B+ terminal of alternator.

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