1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Help please, Rear light flashing

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by duffy78, Jan 17, 2013.

  1. duffy78
    Offline

    duffy78 Member

    Joined:
    Mar 26, 2012
    Messages:
    188
    Likes Received:
    5
    [Jan 17, 2013]
    I'll do my best to explain what is happening. Upon turning the key in the ignition i get a warning beep and displayed in the DIS is the check bulb sign and it says drivers rear light. This all happened first time in the dark on wednesday.

    So i get out of the car to double check which light is out and on the drivers side the light is out but the brake light is flashing steadily on and off about once per second.

    Any ideas what this could be? First i thought ABS but the abs light comes and and goes out as it should and the abs is still working when braking heavy on ice / snow etc.

    Last week when coming back from work in Warrington which is a 2.5 hour drive the traction control light came on for the last 10 minutes of the journey. Not sure if this has anything to do with the above.


    Any advice or help would be appreciated.
    #1
  2. Ads

    Ads

    [Dec 25, 2014]

  3. BlackQuat
    Offline

    BlackQuat Well-Known Member VCDS Map User

    Joined:
    Nov 24, 2009
    Messages:
    1,826
    Likes Received:
    44
    [Jan 17, 2013]
    Sounds like the brake light switch.
    #2
  4. VagCabby
    Offline

    VagCabby Active Member

    Joined:
    Apr 15, 2012
    Messages:
    284
    Likes Received:
    29
    [Jan 17, 2013]
    How long have you had the car? If its a recent purchase check that it hasn't has LED bulbs fitted at the rear. Faulty LED bulbs flash if there on their way out.
    #3
  5. quattrojames
    Offline

    quattrojames Moderator Staff Member Moderator

    Joined:
    Mar 28, 2008
    Messages:
    13,940
    Likes Received:
    493
    [Jan 17, 2013]
    Have you tried another bulb?
    #4
  6. Andi25th
    Offline

    Andi25th Member

    Joined:
    May 14, 2010
    Messages:
    226
    Likes Received:
    16
    [Jan 17, 2013]
    Try replacing the bulb first, might be shorting somewhere.
    #5
  7. duffy78
    Offline

    duffy78 Member

    Joined:
    Mar 26, 2012
    Messages:
    188
    Likes Received:
    5
    [Jan 17, 2013]
    Going to try a bulb tonight.
    #6
  8. duffy78
    Offline

    duffy78 Member

    Joined:
    Mar 26, 2012
    Messages:
    188
    Likes Received:
    5
    [Jan 18, 2013]
    Go to the top of the class that man who suggested led bulbs.

    Look at this mess

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    Led bulb gubbins has melted into the side of the light clusters. Clusters filled with water and caused a short!

    One of the clusters is all blackened with charcoal so I'm pretty lucky that there wasn't an electrical fire!

    Ill be putting it all back to oem and sealing the clusters as best I can
    #7
  9. Andi25th
    Offline

    Andi25th Member

    Joined:
    May 14, 2010
    Messages:
    226
    Likes Received:
    16
    [Jan 18, 2013]
    Christ what a mess.
    #8
  10. crazy88
    Offline

    crazy88 Loving the anonymity

    Joined:
    Nov 26, 2009
    Messages:
    4,858
    Likes Received:
    400
    [Jan 18, 2013]
    Wow, that's horrendous! Luckily nothing serious came from it. Is the car new to you then? It seems like they've mounted the power resistors to the plastic? Silly sausages!
    #9
  11. VagCabby
    Offline

    VagCabby Active Member

    Joined:
    Apr 15, 2012
    Messages:
    284
    Likes Received:
    29
    [Jan 18, 2013]
    Wow that's bad! As you said lucky it didn't set on fire. Some people shouldn't attempt electrics. Unbelievable. All that for the sake of a bulb.
    #10
  12. quattrojames
    Offline

    quattrojames Moderator Staff Member Moderator

    Joined:
    Mar 28, 2008
    Messages:
    13,940
    Likes Received:
    493
    [Jan 19, 2013]
    So it's a standard cluster with a led bulb been put it it, and resistors melted the housing? Eeek.
    #11
  13. duffy78
    Offline

    duffy78 Member

    Joined:
    Mar 26, 2012
    Messages:
    188
    Likes Received:
    5
    [Jan 19, 2013]
    I've had the car 8 months.

    Any tips on how to reverse engineer this? If someone could link to a page showing an install I should be able to work it out.
    #12
  14. VagCabby
    Offline

    VagCabby Active Member

    Joined:
    Apr 15, 2012
    Messages:
    284
    Likes Received:
    29
    [Jan 19, 2013]
    I think your best bet would be to remove all that crappy red insulating tape so you can see what your dealing with. I assume they have tapped into your original wiring loom. I'd just snip or unsolder any aftermarket wires coming off the loom then just fit standard bulbs.
    #13
  15. duffy78
    Offline

    duffy78 Member

    Joined:
    Mar 26, 2012
    Messages:
    188
    Likes Received:
    5
    [Jan 20, 2013]
    All sorted now. I snipped out all aftermarket wiring and installed some normal filament bulbs.

    Thanks for all the advice.
    #14

Share This Page