Hymer b534 leisure battery charging

Discussion in 'Tech/Mech General' started by Darren, Jan 25, 2015.

  1. Darren

    Darren Funster

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    I recently purchased a b534 , this is my first motorhome. I have noticed that the engine when running is not charging the two leisure batteries. When I plug in to hook up the batteries are charging fine. I have checked this out with a multimeter. How does the engine/alternator charge the leisure battery? I have two fuses next to the leisure battery and these are ok.
     
  2. pappajohn

    pappajohn Funster Life Member

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    Usually via a split charge relay which is usually close to the engine battery.
    When the engine is started the alternator current activates a relay and passes some current to the leisure battery.
     
  3. JeanLuc

    JeanLuc Funster

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    What year is your Hymer?
     
  4. Darren

    Darren Funster

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  5. Darren

    Darren Funster

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    What does the split charge relay look like any pictures of one?
     
  6. JeanLuc

    JeanLuc Funster

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    With that vintage (1995) I think it will be equipped with a Schaudt Elektroblok (EBL). This controls charging both from mains and alternator and there will not be a conventional split-charge relay. There are two 50amp fuses protecting the batteries: one in the engine bay near the starter battery; the other near the leisure battery(ies) in the habitation area (or locker). Both these fuses are in the +ve lines going from the relevant battery to the EBL. Check that the one in the engine bay has not blown. If it has, take care when replacing that there is not an underlying fault that will cause a further fuse failure.
     
  7. Darren

    Darren Funster

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    Thank you for trying to help. I have checked the fuse and both are good.
     
  8. TUCANO

    TUCANO Funster

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    Darren,

    Peter Hambilton of Preston is the Hymer guy you need to speak to if you can't get help any other way.
    His tel no is 01772 315078.

    Hope this helps.

    Norman.
     
  9. MikeD

    MikeD Funster

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  10. Andy

    Andy Funster

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    Hi Darren,
    I've a 644 '89 reg so things might be different, I had same prob's when trying to run two leisure batteries + the one under the bonnet; Spoke with an auto electrician who tested alternator output, and we found it wasn't up to keeping three batteries in charge. cut leisure bat down to the one, and have had no probs since. :) (will be fitting solar panel very soon, so maybe's fit it back). do you have the battery charger fitted so you can charge when on mains hook up ?
     
  11. Darren

    Darren Funster

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    Thank you

    Does not say about charging from the alternator in that manual.
     
  12. Darren

    Darren Funster

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    The batteries will charge ok when on mains hook up.
     
  13. Andy

    Andy Funster

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    Sounds like alternator isn't beefy enough to charge all 3 batteries, although I'm no expert.
    Might be worth getting alternator output checked
     
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