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No electrical power

Shaybo Apr 16, 2017

  1. Shaybo

    Shaybo Registered User

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    Hi, I've just replaced the clutch in my A4, when it was all connected back up the dashboard lights are on with no key in the ignition, when I try to start the car every thing is dead! Any solutions?
     
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  3. Darren92

    Darren92 Registered User

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    Try disconnecting the battery for 15 mins and see what happens.
     
  4. Shaybo

    Shaybo Registered User

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    Hi Darren92,
    I've had battery disconnected all night, when I check the voltage on the battery it's only showing 3 volts when connected, when it's not connected it's showing 12.6, so I'm getting even more confused with it.
     
  5. Darren92

    Darren92 Registered User

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    Out of curiosity, connect it up and jump it from the jumping points under the bonnet.
     
  6. Shaybo

    Shaybo Registered User

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    Tried that, it seems like I'm loosing power from the battery to the starter! When you push the key in there is nothing, take the key out and all the dash warning lights are on!
     
  7. Darren92

    Darren92 Registered User

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    Get it back on the lift and re-trace your steps when you done the job and double checking everything
     
  8. xpoweruk

    xpoweruk TTTS 8J Smile Machine

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    Have you checked all the fuses on top of the battery ?
     
  9. xpoweruk

    xpoweruk TTTS 8J Smile Machine

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    You can see them in the below vid,it also shows you how to check if the overload fuse has gone.
    Although his battery procedure isn't the best in regards to putting on the terminal

     
  10. Shaybo

    Shaybo Registered User

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    Checked all fuse's and gone over everything several times!
     
  11. Zafi

    Zafi Registered User

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    3v when connected? Measured with a volt meter on the battery terminals?
     
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  13. Shaybo

    Shaybo Registered User

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    Yep! I have no use of the keys, won't unlock or lock the car! Like I say when the battery is connected all the ease warning lights are flickering on without a key inserted, when the key is inserted it makes no difference!


    Sent from my iPad using Tapatalk
     
  14. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User

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    Have you tried charging the battery as it sounds like it's very low or has failed.
     
  15. Shaybo

    Shaybo Registered User

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    Looks like that might be the next step!



    Sent from my iPad using Tapatalk
     
  16. Zafi

    Zafi Registered User

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    If the battery is 3v when connected to a small load I recon it's goosed. Might not recover it's full capacity when charged, might let you down in future.
     
  17. @udi A3

    @udi A3 Well-Known Member VCDS Map User

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    Is something shorting out? Or an earth strap missing or not on tight?
     
  18. rum4mo

    rum4mo Registered User

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    If I found that I was measuring 3 volts across a nominally 12 volts battery, the first thing I would be doing would be removing a lead from that battery, then seeing what happens as the last thing you want is a burned out wiring loom section of worse!
     
  19. youngy93

    youngy93 Registered User

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    missing earth?
     
  20. rum4mo

    rum4mo Registered User

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    In a situation were the owner can confirm that a battery open circuit voltage is 12.6V and that its connected voltage is 3V - both measured across the actual battery terminals, there is no chance that a missing earth would influence these readings.
     

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