Engine does not charge leisure batteries

Discussion in 'Tech/Mech General' started by hymerb694, Aug 17, 2016.

  1. hymerb694

    hymerb694 Read Only Funster

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    My Hymer is a Fiat Ducato 2.8 2001, the engine will charge the starter battery but not the leisure batteries, however when hooked up to mains the onboard charger will charge both the leisure and starter batteries, any Ideas, I wondered if the split charger was broken as the engine charges the starter battery at a constant 14+ volts. Help please
     
  2. Robert Clark

    Robert Clark Funster Life Member

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    If the engine is running, does the fridge work off 12v?
     
  3. hymerb694

    hymerb694 Read Only Funster

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    No I checked that, had the engine running for half an hour and no sign of it cooling, on mains you can feel it quite quickly
     
  4. Robert Clark

    Robert Clark Funster Life Member

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    Ok - this is a long shot but I had the exact same problem on my Carthago.
    The split charger stopped working suddenly - so did the fridge, when running on 12v
    It was a fault in the entire D+ circuit
    Dealer traced the fault to a 50a fuse attached to the engine battery, which is the feed to the D+ circuit
    I've now got a supply of these fuses, just in case it happens again.
     
  5. houdini

    houdini Funster

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    We had this with the Adria, I think it turned out to be just a missing/faulty fuse on the engine/leisure battery preventing the split charger working. Will check with David when he gets back.
     
  6. hymerb694

    hymerb694 Read Only Funster

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    I checked the big fuses in the engine compartment there were 5 and they all looked ok, according to Brownhills, I do not have a split charge relay, I found that strange??
     
  7. hilldweller

    hilldweller Funster Life Member

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    Try the Schaudt website. The wiring diagram of the Electroblock will show the split charge relay.
     
  8. wigster

    wigster Funster

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    On my hymer b680 there is a 20 amp fuse in a block above engine battery it's the last one on the right looking into engine bay.
    I had no leisure battery charge and no fridge when engine running turned out this fuse had blown . (y)
    Just noticed yours is a fiat base vehicle but still worth a look.
     
  9. houdini

    houdini Funster

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  10. hymerb694

    hymerb694 Read Only Funster

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    Hey success, there is a 3 amp fuse tucked away at the back of the engine compartment, as it is only 3amp it must be a control circuit, so no great load on it, I have also found out that there is no split charge relay either, it is done thru the fancy charger that is built in.
    Thanks for your help, it spurred me on to find a solution, without a good torch I might not have found it.
     
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