E46Fanatics - View Single Post - FIXED: Aftermarket LED tail light is out or flickers intermittently
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Old 12-30-2011, 10:51 AM   #18
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Join Date: Dec 2011
Location: Hungary
Posts: 11
My Ride: E46 320d
Originally Posted by trj View Post
^ what do you mean by change the wires? did you interchange the little black boxes? If the problem still persists after swapping the boxes, then there are 2 possibilities.
1) the actual tail lights are faulty. Take them out and swap it with the working ones. You can just hook them up to the opposite harnesses, no need to mount them on the car(which would be impossible without breaking them). This will decide whether you need to go to step 2.
2) trace and check the wiring coming to the black boxes from the third brake light, or the other working tail light. I am not sure unto where you will need to trace for the wiring, I'm sure some one can give you a wiring diagram here.

Do 1) first, so you know whether its the actual lights or the wiring.

PS: The soldering is flimsy in the EE tails, so if the actual tail light is the issue, cut it open and check the soldering, resolver the wire joint points.

Yes, I changed the black and also bigger gray boxes. There arent any change. My lamp is faulty,I think. It does this random. Sometimes its good. When I connect the cables, its good for 1 second and after it becomes dim/pale. If I switch the low beam off, I can see the brake lights but much more dime than the right side!
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