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Old 10-03-2012, 03:35 PM   #14
sunnyjay
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Join Date: Nov 2011
Location: USA
Posts: 189
My Ride: 01 330i
Quote:
Originally Posted by jfoj View Post
Ground loop, bad connection, alternator has a shorted diode.

Use jumper cables to make a temp jumper from engine block to body ground and see if noise is reduced.
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