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Thread: Autosparky question

  1. #1
    Member Beetroot's Avatar
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    Autosparky question

    A question for a autosparky or anyone in the know.

    The battery light (not charging) light is constantly illuminated on my 4x4.
    With the motor running the battery voltage wont charge over 12v, but it is charging. I've been able to drive and start it pretty easily, if its been sitting a while it's a bit slow to start but once running will charge the battery up to 12v again.
    Revving the engine will still only output 12v and with lights and radio on will still output 12v.

    Is it fair to assume that the voltage regulator is buggered, and that is all that requires replacement. Or I there something else that may be at fault?

    Cheers

  2. #2
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    alternator fault, but just make sure all leads including the battery earth lead or not corroded

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    Also include what it is too, this helps as could be brushes or reqs or relays depending on vehicle

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    sounds like an alternator fault, as it should be charging about 14.5 volts not 12
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  5. #5
    Member northdude's Avatar
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    Yep should be higher than 12v

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    Quote Originally Posted by longrange308 View Post
    Also include what it is too, this helps as could be brushes or reqs or relays depending on vehicle
    This one.
    There are only three types of people in this world. Those that can count, and those that can't!

  7. #7
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    Sack of shit Land Rover???

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    Quote Originally Posted by Nibblet View Post
    Sack of shit Land Rover???
    Hey, that is not a nice way to talk about a sack of shit!
    There are only three types of people in this world. Those that can count, and those that can't!

  9. #9
    Member northdude's Avatar
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    Quote Originally Posted by gadgetman View Post
    Hey, that is not a nice way to talk about a sack of shit!
    That's a pretty degrading name to call a sack of shit
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  10. #10
    Member Beetroot's Avatar
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    Quote Originally Posted by Nibblet View Post
    Sack of shit Land Rover???
    Yeah, Landrover Discovery. But the Alternator was made in Japan, so it's not the Poms fault (this time).

    I will check again the battery terminals and earth lead, but pretty sure they were fine.
    It seems to be constantly charging at 12v, so that's why I think it's the regulator.

  11. #11
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    Quote Originally Posted by Beetroot View Post
    Yeah, Landrover Discovery. But the Alternator was made in Japan, so it's not the Poms fault (this time).

    I will check again the battery terminals and earth lead, but pretty sure they were fine.
    It seems to be constantly charging at 12v, so that's why I think it's the regulator.
    You are just seeing battery voltage. It might just need brushes and turn the slip rings. Most sparkeies will do a full job - brushes, bearings, reg etc.....

  12. #12
    Member northdude's Avatar
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    be prepared to get good at removing and refitting the alternator if you don't do the full job
    kokako and mikee like this.

  13. #13
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    Quote Originally Posted by northdude View Post
    be prepared to get good at removing and refitting the alternator if you don't do the full job
    Yeah you are probably right, I can get a brand new OEM one landed from the UK for $280.
    Probably worth just getting that, rather than repair one thats 20 years old and done 300,000kms

    Out of interest, is there any multimeter test I can do do determine if it is the regulator or not?

  14. #14
    Member northdude's Avatar
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    the reg is probably inside the alt put your multi meter on the battery terminals and see what the reading is with car not running then start it up and see what the reading is then switch all the electrical shit on in the car headlights full fan full etc see if the reading goes up just at idle even with nothing on I think you should be getting at least 13v

  15. #15
    Member Beetroot's Avatar
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    Quote Originally Posted by northdude View Post
    the reg is probably inside the alt put your multi meter on the battery terminals and see what the reading is with car not running then start it up and see what the reading is then switch all the electrical shit on in the car headlights full fan full etc see if the reading goes up just at idle even with nothing on I think you should be getting at least 13v
    I've done that, the battery voltage never got highet than 12v.
    But the battery does seem to he charging as I have started it and drove a few times in the last couple of months and although its slow to start, seems to charge up to 12v again.

 

 

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