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Thread: GSi battery - yes it's cream crackered!!

  1. #1
    Regular Member gtr1000's Avatar
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    Vehicle : Insignia

    Trim : Sri

    Engine : 140 Ecoflex S/S

    Year : 2013

    Default GSi battery - yes it's cream crackered!!

    Started the GSi this morning, the first time in a week and all was fine. Moved it into the sun to get rid of the snow and left it there for around 4 hours with the engine off.

    Just gone to start it again and all I got was the signs of a flat battery, a very fast ticking noise and the engine not turning over. Checked the voltage across the terminals and got 12.5v.

    Got a neighbour to jump start the Vec and it started no problem.

    So, car's up and running but when I measured the voltage across the terminals with the engine running, it was reading 22v .

    Now I'm thinking new battery time but what about the 22v when charging?

  2. #2
    Regular Member mattv6diesel's Avatar
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    Vehicle : Bmw 330d

    Trim : Msport

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    22v would fry the car i'd check it and hope it's wrong

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    22v across the battery is the alternator gone faulty, not the battery.

    Don't use the car, get the alternator repaired/replaced.

  4. #4
    Regular Member macdad's Avatar
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    Voltage regulator has gone you, need to replace alternator.

  5. #5
    Regular Member gtr1000's Avatar
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    Vehicle : Insignia

    Trim : Sri

    Engine : 140 Ecoflex S/S

    Year : 2013

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    Having thought about the 22v this afternoon and reading your replies, the first thing I'm gonna do in the morning is double check the reading on my multimeter.

    I have a feeling that when I had the DC range set to 0-60v, I read a 1/4 scale deflection as 20ish when in fact I think, in hindsight, it may have been 15v.

    Will double check in the daylight. Thanks guys so far.

  6. #6
    Regular Member gtr1000's Avatar
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    Vehicle : Insignia

    Trim : Sri

    Engine : 140 Ecoflex S/S

    Year : 2013

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    Update - now I've got a new digital multimeter, I've got the following readings @ -1 deg C:

    Across terminals after car has been left overnight, not started = 12.1V

    With rear screen and blowers on = 13.8 to 14.1V

    I think the 12.1V after standing indicates a duff battery - can someone confirm before I spend my Xmas pressie money.

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    13.8 > 14.1 with engine running and electrical load indicates the alternator is regulating properly.

    If the battery is simply flat from standing, then 12.1 in the cold is to be expected - but if the car's been used a reasonable amount then the battery isn't holding a charge.

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    Regular Member gtr1000's Avatar
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    Vehicle : Insignia

    Trim : Sri

    Engine : 140 Ecoflex S/S

    Year : 2013

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    Quote Originally Posted by Ruperts Trooper View Post
    13.8 > 14.1 with engine running and electrical load indicates the alternator is regulating properly.

    If the battery is simply flat from standing, then 12.1 in the cold is to be expected - but if the car's been used a reasonable amount then the battery isn't holding a charge.
    Strange thing is that having left the car for three very cold days without starting, it started perfectly today with no signs of having a weak battery. I was expecting the "click click click" again today but the engine burst into life as if it was a warm summers day.

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    Cold weather, poor conditions needing lights, etc, and not being used regularly can lead to a low charge battery.

    It might be time to invest in a "smart" charger, eg CTEK XS3600 £50 or Aldi/Lidl XS £13 - I have both a CTEK XS3600 and an Aldi XS - the CTEK is the better charger, the Aldi/Lidl the better value - each of these can be left connected permanently without overcharging a battery.

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