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Is my alternator nackred?

Discussion in 'A3/S3/Sportback (8P Chassis)' started by Audi-Jord, Jan 16, 2012.

  1. Audi-Jord

    Audi-Jord New Member

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    I recently bought myself a 2004 Audi a3 fsi sport, but the traction controll light came on and the battery light keep coming on when I go up a hill then goes off now and then, the car had a new battery fitted a month ago too, any ideas?
     
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  3. warren_S5

    warren_S5 Moderator
    Staff Member Moderator VCDS Map User

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    Put a multimeter on the battery terminals to see what voltage the cars putting out before starting it. Much less than 12v is a warning sign. Car should be able to generate upto 14.4v when running.

    Does the car labour much if you turn on aircon or full beam lights?

    If it is alternator the new battery will eventually suffer. Also check o make sure earthing connections to the chassis look clean /good.
     
  4. paddy

    paddy Audi=No fault code, no idea

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    Also put a voltmeter across the battery and get someone to try and start the car and see what the voltage drop is under load. It should still put out 10+ volts. Also check battery fluid levels if its losing voltage up hill
     
  5. Audi-Jord

    Audi-Jord New Member

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    Il go in past a garage on my way home, I never noticed it labour but the battery light came on every time I wheel spun (it was icy)
     
  6. paddy

    paddy Audi=No fault code, no idea

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    Are you sure it was the battery light ?
     
  7. Audi-Jord

    Audi-Jord New Member

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    Well it was a red rectangle with a positive and a negative inside of it. It wasn't the ESP light because that's on all the time
     
  8. Audi-Jord

    Audi-Jord New Member

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    Is it possible for a faulty alternator to make the traction control light to stay on?
     
  9. Audi-Jord

    Audi-Jord New Member

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    Oh and I forgot to say, before I bought my car the dealer said that he changed the battery because the car wasn't starting great, maybe because it was dead because the alternator wasn't charging it, that was about 2 weeks ago
     

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