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I believe... (archive)

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Posted by Jeff J. on August 31, 2001 at 10:15:02:

In Reply to: Low beams: 2 lights. Hi beams: 2 or 4 lights? posted by Erik Brannfors - Seattle on August 31, 2001 at 09:13:13:

When BMW switched back to the sealed beams (in the US), they made it so that the H4 bulbs on the low beams switch to a higher power when the highs go on. I think there might be an issue somewhere that is not allowing your low beam bulbs to switch to the higher wattage when the highs come on.
What type of light are you using? Are you using aftermarket bulbs? It might be that the bulbs you are running will not accept the higher wattage setting when you turn on the high beams. This could be why they seem to shut off when you go to the highs.
They way it should be is that when you turn on the highs, the lows switch to a brighter intensity. This in effect makes it appear like you have 4 high beams at once...
Please tell us what your light setup is. Is it still stock?

Jeff J.

OK huys, still looking for the silver bullet. Low beams on: the 2 outside lights come on. Flip to hi beams: the power goes off to the outside lights and comes on for the 2 inside lights. However, on hi there is no way for the power that it energizing the hi beams to get to the lo beam bulbs. So, when YOU flip on your hi beams, do you only have the 2 inside lights on or do all 4 come on? This is on my now running 1990 M3.......

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