Hymer b534 leisure battery charging

[Darren]

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.

 

[pappajohn]

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.

 

[JeanLuc]

What year is your Hymer?

 

[Darren]

1995

 

[Darren]

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

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[JeanLuc]

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.

 

[Darren]

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

 

[TUCANO]

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.

 

[MikeD]

http://gebrauchte.hymer.ag/Anleitungen/1269361.pdf

This might help. Page 107 onwards

 

[Andy]

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 ?

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[Darren]

Thank you

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

 

[Darren]

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 ?

The batteries will charge ok when on mains hook up.

 

[Andy]

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