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3-Series (E46, E90) Chat relating to the BMW 3-Series from 1999 to Current. Models include: BMW 316i, BMW 318i, BMW 318Ci, BMW 320i, BMW 323i, BMW 325i, BMW 330i, BMW 328 Ci, BMW 328i, BMW 325i/xi, BMW 330Ci, BMW 320d, BMW 330d, BMW 335d.

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Old 11-12-2005, 10:18 PM   #1 (permalink)
Join Date: Nov 2005
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Transeau is on a distinguished road
LED Tail Light help

Hey guys, I hope you can help me out on this.

My father has 2003 325i. He bought some German tail lights. The brake, and two running light are LEDs and the turns are standard.

He wired them up and... well, they didn't exactly work.

I went over to help him out and ran some tests. I know that the two running lights are 12v, 25% duty cycle.... unless you pull the brake light, then one of them is brought up to 100% duty cycle.

Needless to say the LEDs don't like the pulsed power.

Now, on my VW, I can recode my lighting module to deal with LED vs incandescent lighting.

Can the BMW's lighting module be recoded / reflashed to NOT pulse the power? Or does anyone have a circuit to put into play that will deal with this problem?

Thanks much!
Bryan Transeau
2003 VW Bora 20V Turbo - 320hp at the wheels
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Old 11-14-2005, 10:00 AM   #2 (permalink)
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jeremer is an unknown quantity at this point
Are you talking about the fast flashing on the turn signal when it's on? If so, I think the dealership can fix that for you, or you can get a equalizer for the LED. It works fine for me. Hope this help
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