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Electrical power loss

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by Red_Stafford, Feb 28, 2012.

  1. Red_Stafford
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    Red_Stafford Member

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    [Feb 28, 2012]
    Hi all I have a 2003 A4 estate 2L TDi 130 sport, and whilst driving I get electrical power loss, sometimes the power goes and the clocks don't reset and then other times the clocks completely reset but the car always comes back on straight away, I'm getting worried because ita cut out a few times in dodgy situations such as around corners with no power steering or when u pull out in front of someone
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  3. Red_Stafford
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    Red_Stafford Member

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    [Feb 28, 2012]
    When it cuts out the car beeps 3 times and the handbrake symbol appears and then the car re starts
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  4. Mike B
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    Mike B Member

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    [Feb 28, 2012]
    Are you saying that the engine cuts and you have restart?I think you have a bad cnnection somewhere and it may need diagnostics if you cant trace it .Are the battery connections tight?
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  5. kite
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    kite Member VCDS Map User

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    [Feb 28, 2012]
    Check your brake fluid level
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  6. Red_Stafford
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    Red_Stafford Member

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    [Feb 28, 2012]
    I've checked the battery terminal and they are fine, just wondering what would the brake fluid have to do with it ?
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  7. kite
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    kite Member VCDS Map User

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    [Feb 28, 2012]
    Brake warning on the dash could be low fluid. Have your battery checked.. It could be a sign of a dying battery
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  8. Red_Stafford
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    Red_Stafford Member

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    [Feb 28, 2012]
    I've never had a problem with the battery, it starts first time no problem even in the coldest weather
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  9. PAULF
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    PAULF Active Member

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    [Feb 28, 2012]
    I'm having a similar problem here DIS dead on my b5. I'm now suspecting an alternator diode pack, but am not really getting anywhere fast! I don't have exact same symptoms, but it has been a headache hunting down each theory - especially as the fault keeps changing a little! I would look at your earths first, and also check for fault codes. The codes may indicate where the power loss is coming from by what modules are effected.Electronics really don't like low voltage, whereas no volts just switch them off. (Hence the comments about bad battery)
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  10. brownycab
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    brownycab Member

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    [Mar 18, 2012]
    i have this problem with my a4 cab does your battery light flicker randomly round corners? or when you give it some beans? mines cut out a few times excactly same as you have described. have you sorted the problem if i find out what is wrong i will PM you mate
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  11. Red_Stafford
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    Red_Stafford Member

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    [Mar 18, 2012]
    I haven't noticed the battery light flashing ?
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  12. brownycab
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    brownycab Member

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    [Mar 18, 2012]
    yer mine flickers a bit then if you push the car harder it just turns off like the ignition has just been turned off then a mil of a second after cars on and running again does yours do this?
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  13. Red_Stafford
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    Red_Stafford Member

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    [Mar 18, 2012]
    Well yes but not when I push it and I don't get battery light, it just randomly cuts out the comes back on, does your clocks reset ?
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  14. brownycab
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    brownycab Member

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    [Mar 19, 2012]
    ive not really checked that one you mean like average MPG? and miles done and hours run etc? mines under warranty so if they find problem il let you know its going in friday
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  15. Red_Stafford
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    Red_Stafford Member

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    [Mar 19, 2012]
    No just the clock
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  16. brownycab
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    brownycab Member

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    [Mar 23, 2012]
    RED_stafford cars been in the garage and it was the alternator over charging the battery and electrics making the ECU turn off to save it from blowing up. so its alternator mate
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  17. Red_Stafford
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    Red_Stafford Member

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    [Mar 23, 2012]
    So did u have to have the alternator replaced, that sounds expensive
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  18. CHEZ
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    CHEZ moderately amusing

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    [Mar 23, 2012]
    alternator simple as!
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  19. Red_Stafford
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    Red_Stafford Member

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    [Mar 23, 2012]
    May be simple to fit but expensive to buy ?
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  20. CHEZ
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    CHEZ moderately amusing

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    [Mar 23, 2012]
    as always sadly mate!
    theres nowt cheap on these cars!
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  21. BlackQuat
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    BlackQuat Well-Known Member VCDS Map User

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    [Mar 23, 2012]
    With alternator over charging, you usually get your airbag light glowing.
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  22. Red_Stafford
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    Red_Stafford Member

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    [Mar 23, 2012]
    My airing light is always on but i was told about a year ago that's because there was a sensor out. The airing light came on a long time before the electrical problem
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  23. marktdisport
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    marktdisport Active Member

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    [Mar 24, 2012]
    the plot thickens lol....... try fleabay search for cars breaking if you dont want new
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  24. brownycab
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    brownycab Member

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    [Mar 25, 2012]
    alternators are about 90 quid on flea bay mate but prob could get a recon swap for you old one, it looks easy enough to do, just thought with it been under warranty let them pay n do it
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