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Thread: new thread - same issue - BATTERY LIGHT!!!!

  1. #1
    Regular Member SarahP's Avatar
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    Default new thread - same issue - BATTERY LIGHT!!!!

    Ok new thread.. just a quick reminder, had new alternator fitted July this year after losing everything & battery light came on, fitted all good..
    In August (6 weeks later) battery light came on again, put on replacement alternator... all good!
    Ironically 6 weeks later AGAIn.. ****** battery light... bear in mind it comes on and stays on, when I turn engine off and on there is no battery light, we did a 25 mile run after (no light).. few more days running about then light came on again & syated on, turned engine off and on (no light) did another 20 miles and no light.. this morning i decided to do some readings

    no engine on :12.3v
    started car this morning, readings were as follows:
    Engine running: 14.34
    " but with everything on: 14.23
    turn everything off again: 14.30

    drove down to school battery light came on, as I kept reader with me I checked it whilst the light was still on & engine still running it showed :14.34!!

    took my 2 youngests into school and drove home (no light) pulled on drive and took readings again (still no light) -
    engine running only: 14.34
    with everything on: 14.19
    turn everything off except engine: 14.26, 14.27, 14.28 (then I turned engine off)

    now with my head in the engine (not literally!!) i looked at belt going round and it seems fine, (its tight when engine is off) I could 'faintly' hear squeeking/chirps, but cannot hear that at all in the car...
    what u think now?? its doing my head in!

    I have 1.9cdti (120) estate 54 plate.. the 2 alternators recently fitted are both from Euro Car Parts and I 'think' it was the 110amp (i could be wrong)

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    Regular Member Ben50n's Avatar
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    Either there is a problem with the alternators or you have a break/fault in the wiring? I would suggest taking it to a good auto electrician to have it checked over.

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    Regular Member SarahP's Avatar
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    thank you Ben, its such a mystery!

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    Have you tried the connections first for corrosion both on the alternator and the bat although you getting a goog reading it only takes one drop for the light to come on and stay on till you turn off and on again also check the belt pully is right to mate

  5. #5
    Regular Member SarahP's Avatar
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    belt pulley? is that the round things that the belt goes round on? if so how do I check that?

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    Regular Member graham a's Avatar
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    sarah,the thin wire coming off the alternator is the charge wire,and should be a negative.i would check here and see what the voltage is.check this drawing,it should give you some idea
    http://www.google.co.uk/imgres?q=car...18,s:322,i:156

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    Regular Member SarahP's Avatar
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    do i put the negative probe from the reader to this wire then and do I check it with the engine off or on? ..

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    Regular Member graham a's Avatar
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    first of sarah,check the connections at the alternator.then proceed with a voltage check,with the engine OFF.then see if you can get a voltage test at this connection,with the engine running.can i say be very careful when the engine is running,where your sticking your hands .what type of meter are you using sarah,as a multimeter would be best

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    Regular Member SarahP's Avatar
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    it is a yellow multimeter with red and black leads

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    Regular Member graham a's Avatar
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    Quote Originally Posted by SarahP View Post
    it is a yellow multimeter with red and black leads
    let us know how you get on.doing work stuff,but will keep a eye on your thread

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