[QUOTE=panto;627945]I see, so you're saying that when the car starts up it does some quick diagnostic checks by sending a small current to certain electrical components to check that they're okQUOTE]
Yes thats exactly my point, because after I installed my angel eyes for the first time ( mind you ccfl angel eyes ) and assuming you know how to install these rings into the headlight assembly, you would know that they have to be routed outside the assembly and to a electrical wire outside. Getting to the point
I forgot to plug in the low beams. So I had my brother turn the lights on, and after 3 seconds I saw a short flicker of light twice and almost immediately I heard a ring ( the sound of the low beam not detected by the car).
Also idk how abt how you installed your angel eyes, but I connected my black to the ground wire ( brown and black) fog lights and the yellow and red together. I quick spliced them so hard, that the bare wire was exposed, so I guess the current would be flowing.
After I read your post I see that you said It would come on for 5 seconds or so. It has the be an electrical current as a result. may the other factory lights wont do the same because they have certain fuses hardwired into the bmw computer. Thats my guess.