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Old 11-12-2012, 02:09 AM   #2
Registered User
Join Date: Aug 2008
Location: Portland, OR
Posts: 9
My Ride: 2004 E46 330i
Well, I have pretty much confirmed that the problem is in the wiring. Swapped the taillight assemblies and when I plugged the left taillight assembly in the the rightside plugs, everything worked fine. I did a very cursory check of the wiring and could not find an obvious problem. I heard that the grommet that goes from the trunklid to the body is a potential failure point, so will look at that next, but what is still very odd to me is that the lights in the left taillights are on, albeit very dim. If the wiring did fail, I would not expect the bulbs to light up at all.
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