2004 E46 320d sidelight bulbs

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  1. 2004 E46 320d sidelight bulbs 
    #1
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    Hi would be greatful if someone could answer my query, I bought a pair of LED sidelight bulbs of the internet, they are the pure white ones. I wanted to get away from the yellow headlight look. When I put them in the car they put the light warning lights on in the dash and also if you just have the sidelights on by themselves both front indicator lights stay on. When the car is turned off and keys removed from ignition the led's still emit quite a dim light (they wont turn off) I have changed back to original bulbs, but am curious as to why this happens.
    Thanks for any response.
     
     

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    I believe this is all to do with the power rating on the bulb.

    LED's use less power IIRC.

    The indicators will come on as it's a default setting designed to function if your lights are blown
     
     

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    Quote Originally Posted by A20 RYM View Post
    I believe this is all to do with the power rating on the bulb.

    LED's use less power IIRC.

    The indicators will come on as it's a default setting designed to function if your lights are blown
    Yes RYM is correct. Because the LED lights emit such a low voltage, the car thinks there is no bulb/the bulb is not working causing the warning light to appear in the dash. The bulb warning system works by detecting a voltage emitting from the bulb, if the voltage does not meet the minimum requirement, the car will assume the bulb is not working or is missing.

    About the indicators lighting up...the car has a feature where the indicators work as a replacement for the missing sidelight bulb (in your case both). I had the same issue when I replaced my sidelight bulbs with LED bulbs. I went to my local car electronics shop and he relaced them with pure white normal bulbs which go very well with the main headlight bulbs.

    The indicator working as a replacement bulb feature can be switched off at the local dealership or an independent BMW specialist as far as I remmember...

    Get rich or die tryin'...
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    Adding some resistors will cure this
     
     

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    naz86 (29-04-2010)

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    Quote Originally Posted by RYM View Post

    The indicators will come on as it's a default setting designed to function if your lights are blown
    Guys,

    Sorry to stoke up an old thread but last night I did the swirl flap modification.
    After putting everything back together, I started the engine and tested the main electronics.
    When I turned on the headlight switch, the dash told me I had a bulb out on the n/s headlight.
    So I got out, took a look and sure enough the sidelight bulb wasn't working and the indicator was lit up dimly.
    I took the bulb and holder out of the headlight and pulled the bulb out - looked fine to me so I popped it back in and it worked!
    I went back to my seat, turned off the headlight switch and then back on and the notifcation had cleared.
    However, everytime I start the car, I'm getting the same thing and everytime I have to disconnect the sidelight and reconnect.
    Now it seems strange but is it related to something I may have done with the swirl flap modification?
    I say this because when I disconnected the battery leads in the engine bay I moved them from across the engine down to near the n/s headlight.
    I turned to pick up my ratchet and I heard what I thought was like a washer falling down intot the engine bay.
    I'm now wondering if the battery leads touched the metal front panel and have shorted something?
    Would that make sense?


    UPDATE:
    I've just tried swapping the sidelight bulbs over and the problem moves with the bulb so I'm going to try a new bulb tonight when I get home.
    Last edited by myboozyhell; 29-04-2010 at 11:05. Reason: Added information
     
     

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    Quote Originally Posted by myboozyhell View Post
    UPDATE:
    I've just tried swapping the sidelight bulbs over and the problem moves with the bulb so I'm going to try a new bulb tonight when I get home.
    Had similar issue myself and a new bulb cured the problem.
     
     

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    It was the bulb
     
     

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    Quote Originally Posted by myboozyhell View Post
    It was the bulb
    The system can monitor when a bulb is on the way out by measuring resistance across the bulb(s) at start-up, then giving you advance warning of a failure.
     
     

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    That is just too clever..... a bit
     
     

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