E90/E91/E92/E93 Lowering voltage on license plate lights - Bimmerfest - BMW Forums



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  #1  
Old 05-19-2017, 12:42 AM
0okm 0okm is offline
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Lowering voltage on license plate lights

Hi,

Does anyone know is there a way to code lower voltage on license plate lights?
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  #2  
Old 05-19-2017, 04:48 AM
efodela efodela is offline
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If you installed led modules you need to code it. Or use proper error cancelling leds

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  #3  
Old 05-19-2017, 04:57 AM
0okm 0okm is offline
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I used to have OEM LED but one of them burned out, so i have bought after market pair. They are much too bright in my opinion. I am looking for a way to make them little less bright. No error appears. Also no error appeared when old one burned out.
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Old 05-19-2017, 05:00 AM
efodela efodela is offline
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Quote:
Originally Posted by 0okm View Post
I used to have OEM LED but one of them burned out, so i have bought after market pair. They are much too bright in my opinion. I am looking for a way to make them little less bright. No error appears. Also no error appeared when old one burned out.
I believe there should be an error any time the bulb dies not sure for yours. Lowering the voltage triggers the error light. Might need to diy some sort of resistor to it.. not sure but good luck.

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  #5  
Old 05-19-2017, 05:05 AM
0okm 0okm is offline
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Maybe it's an error only in FRM - not appearing to driver on dashboard. I didn't checked that.
I have E90 from 2008 (preLCI).

Resistor is one of options I consider. Will try.
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  #6  
Old 05-25-2017, 10:47 AM
0okm 0okm is offline
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I found a solution! NCS -> FRM -> PWM_KZL. There you can modify voltage on license plate lights.
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  #7  
Old 05-25-2017, 03:07 PM
2real4u 2real4u is offline
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To be clear - you are not changing the voltage. You are changing the duty cycle of a Pulse Width Modulation. The voltage at its peak stays the same.
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  #8  
Old 05-25-2017, 10:16 PM
0okm 0okm is offline
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I have no clue what is the difference but final effect is what I was looking for. I coded 6V and they are half less bright.
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