E46Fanatics - View Single Post - Alternator Whine issues with complete custom Sound system!
View Single Post
Old 10-03-2012, 03:35 PM   #14
Registered User
Join Date: Nov 2011
Location: USA
Posts: 191
My Ride: 01 330i
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.
sunnyjay is offline   Reply With Quote