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Old 09-25-2011, 11:49 AM   #153
Steve330ci
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Join Date: Jan 2005
Location: St Louis
Posts: 562
My Ride: 2011 328i, Jet Black
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My wiring harness has five connections: a + connection; a - ground, a connection to each ballast; and a fifth connection that I assume has to connect to one of the car's existing low beam bulb connection.

Also, to make the bi-xenon feature function, there are two leads coming from each projector - I assume these two leads tap into the + and - leads for the car's high beams.

If anyone can advise that would be greatly appreciated!
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