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

brake light problem

Discussion in 'A4/S4 forum(B5 Chassis)' started by frankiejr, May 24, 2009.

  1. frankiejr
    Offline

    frankiejr Member

    Joined:
    Mar 6, 2009
    Messages:
    53
    Likes Received:
    0
    [May 24, 2009]
    i just had an mot done and failed on a few things. (if anyones interested i can put that in another thread.)

    one was the driver side rear brake light out. went to halfords and bought a set. though if im changing one i might as well change the other. once i had changed them though it was still out.

    the side light works but not the brake light??? it is in the right way (only way it fits) :uhm:

    any ideas what could be causing this? need to find the fault asap to re-test. could pay the garage to do it but would rather keep the cost low if i can.

    thanks for any qiuick responses.
    #1
  2. Ads

    Ads

    [Dec 29, 2014]

  3. frankiejr
    Offline

    frankiejr Member

    Joined:
    Mar 6, 2009
    Messages:
    53
    Likes Received:
    0
    [May 24, 2009]
    Anyone? This one has me baffled.
    #2
  4. aragorn
    Offline

    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

    Joined:
    Jan 30, 2008
    Messages:
    15,874
    Likes Received:
    353
    [May 24, 2009]
    Fuses perhaps?

    Get a voltmeter on the contacts to see if the brake signal is getting to the bulbholder.
    #3
  5. frankiejr
    Offline

    frankiejr Member

    Joined:
    Mar 6, 2009
    Messages:
    53
    Likes Received:
    0
    [May 24, 2009]
    i dont have a volt meter but it is only the one side that isnt working. the drivers rear. if the fuse would cause only one side to go out then which one am i looking for?

    thanks for replying.
    #4
  6. moschino
    Offline

    moschino Member

    Joined:
    Jan 7, 2003
    Messages:
    252
    Likes Received:
    0
    [Jun 3, 2009]
    I would check the contacts in the cluster with a voltmeter first. COuld be a connection issue in the plug to the cluster?
    Not sure if the left and right are on different circuits, if so then it might be the brake pedel switch.
    Good luck.
    #5
  7. aragorn
    Offline

    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

    Joined:
    Jan 30, 2008
    Messages:
    15,874
    Likes Received:
    353
    [Jun 3, 2009]
    Unlikely to be the pedal switch as the other side works.

    You need some diagnostic tools though, so go buy a multimeter and get the haynes wiring diagram on the go and see if the brake signal is getting to the light cluster.
    #6
  8. Siena
    Offline

    Siena Active Member

    Joined:
    Oct 28, 2007
    Messages:
    2,626
    Likes Received:
    3
    [Jun 3, 2009]
    Both left and right hand side brake lamps are on the same circuit, so most likely fault would be a broken feed to the driver's side cluster.

    Or a faulty cluster itself.
    #7

Share This Page