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

Have I an alternator problem ? (video)

Discussion in 'A3/S3 Forum (8L Chassis)' started by arsenal_69r, Jan 7, 2010.

  1. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
  2. Ads

    Ads

    [Sep 23, 2014]

  3. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
    [Jan 7, 2010]
    loads of views yet no replys? as you can tell by the video the car starts sloppy and all rev and petrol counters work up untill the heating or windows are operated
    #2
  4. voorhees
    Offline

    voorhees Moderator Staff Member Moderator

    Joined:
    Dec 18, 2005
    Messages:
    15,128
    Likes Received:
    1,190
    [Jan 7, 2010]
    Try being patient
    #3
  5. Sandip
    Offline

    Sandip Well-Known Member

    Joined:
    Nov 7, 2006
    Messages:
    2,382
    Likes Received:
    60
    [Jan 7, 2010]
    Not sure but could be a bad earth somewhere, tricky one
    #4
  6. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
    [Jan 7, 2010]
    whats the best way to check the alternator? using a voltmeter? or the best way to see whats wrong
    #5
  7. Sandip
    Offline

    Sandip Well-Known Member

    Joined:
    Nov 7, 2006
    Messages:
    2,382
    Likes Received:
    60
    [Jan 7, 2010]
    #6
  8. Broken Byzan
    Online

    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

    Joined:
    Apr 26, 2004
    Messages:
    12,605
    Likes Received:
    276
    [Jan 7, 2010]
    check your earths

    a multimeter will show a bad alternator, measure voltage before starting and then start car, the voltage at the batt should go up to around 14 ish volts. If it does the alternator is 99% working fine.
    #7
  9. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
    [Jan 7, 2010]
    nice one cheers bud, one more thing. do i check the wire from the alternator to the battery yer?
    #8
  10. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
    [Jan 7, 2010]

    nice one cheers also is the earths or the alternator the most likey course of this? just so i can shorten it down and concentrate on that cheers
    #9
  11. Broken Byzan
    Online

    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

    Joined:
    Apr 26, 2004
    Messages:
    12,605
    Likes Received:
    276
    [Jan 7, 2010]
    Check volts at the batt, however IMHO there is no way for alt output to have a bearing on this at all. It will more likely be an earth in the car, probably under the knee bolster or similar
    #10
  12. Sandip
    Offline

    Sandip Well-Known Member

    Joined:
    Nov 7, 2006
    Messages:
    2,382
    Likes Received:
    60
    [Jan 7, 2010]
    Think you just connect the black to earth and red to live and see what happens with the light show lol Mark's (byzan A4) more of an expert than me
    #11
  13. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
    [Jan 7, 2010]
    how and where would i check the earth and if it is what then would i do? cheers appreciate this alot
    #12
  14. Sandip
    Offline

    Sandip Well-Known Member

    Joined:
    Nov 7, 2006
    Messages:
    2,382
    Likes Received:
    60
    [Jan 7, 2010]
    Agree with you chief! The dodgy earth could be under the steering wheel trim
    #13
  15. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
    [Jan 7, 2010]
    #14
  16. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
    [Jan 7, 2010]
    another quick thing. how would the earth all of a sudden become a problem?
    #15
  17. Sandip
    Offline

    Sandip Well-Known Member

    Joined:
    Nov 7, 2006
    Messages:
    2,382
    Likes Received:
    60
    [Jan 7, 2010]
    It's a process of elimination with electrics, when you put any heating device on your asking for alot of voltage, is the car actually going off when you put the heating on full?
    #16
  18. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
    [Jan 7, 2010]
    well the first time it done this was when i was driving along the motorway and i pulled over and turnded the engine of and it wouldnt start again it was like a had a flat battery. but to answer your question whilst just the engine is running and the heating fully up the engine is not cutting out now just the dash goin and also the interior light flickering.
    #17
  19. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
    [Jan 7, 2010]
    would using vag pick the problem up or?
    #18
  20. Sandip
    Offline

    Sandip Well-Known Member

    Joined:
    Nov 7, 2006
    Messages:
    2,382
    Likes Received:
    60
    [Jan 7, 2010]
    Its a bad earth :)
    #19
  21. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
    [Jan 7, 2010]
    so what am i to do about the earth then? where would it be and mainly how do you fix it?
    #20
  22. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
    [Jan 7, 2010]
    honeslty appreciate the help bud :)
    #21
  23. Sandip
    Offline

    Sandip Well-Known Member

    Joined:
    Nov 7, 2006
    Messages:
    2,382
    Likes Received:
    60
    [Jan 7, 2010]
    I'm not sure which earth it'll be you need to check, just to be on the safe side, just check if your earth on the battery is secure and not loose, could be an easy fix
    #22
  24. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
    [Jan 7, 2010]
    ill have a look at my batterys earth in the morning, so best thing probs would be to get it looked over then yer?
    #23
  25. arsenal_69r
    Offline

    arsenal_69r audi a3

    Joined:
    Nov 30, 2009
    Messages:
    158
    Likes Received:
    0
    [Jan 7, 2010]
    also what ive just thought if it was my alternator or battery the battery light would pop up on the trip computer?
    #24
  26. MIKE GTR
    Offline

    MIKE GTR Member

    Joined:
    Nov 20, 2009
    Messages:
    366
    Likes Received:
    1
    [Jan 8, 2010]
    FFS just get it tested, KWik fit will do it for free, it could be the voltage regulator within the alternator. There's no point in hunting for a bad earth that might not even be there, it could even be a dry cell in the battery
    #25

Share This Page