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      05-31-2010, 11:33 PM   #2
cgalford
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Drives: 2009 E92 M3, 2008 1098S
Join Date: Apr 2010
Location: San Luis Obispo, CA

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The side lights are LEDs which only work with correct polarity. The 12V car system isn't enough to force current through backwards so there's nothing to worry about. If they work, polarity is correct, if they don't then it's not but won't harm anything.