Just checked my van and as you can see, the green light on the Schaudt booster is off.

The multimeter is showing 13.67V and the panel voltmeter 13.8V. Odd.

P1010167.jpg - Bild entfernt (keine Rechte)

Quote: Agger wrote in post #7

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Quote: Aaron Calder wrote in post #6

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PS Just seen Hob's comment and that makes sense - but what could you short by pushing the fire front back? needs investigating.

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SPECSAVERS must be doing really well thats Robert, and you and me

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Andy.

Can you isolate the booster from the battery circuit and report back with the voltage across the terminals (with the van still hooked up to the mains), d'you think? There should be an inline fuse between the booster and the battery.

It'd be good to rule out incorrect wiring of the booster - it really should have no function unless you have a vehicle attached and its engine is running.

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Good point, Pete.

There's a 2amp (grey) fuse on the floor of the van near the booster. Mine had blown preventing the booster from working so removing that temporarily would do the trick, Andy.

This is all very confusing.

So far as I understand it (and I'm wide-open to correction here) the Continentals tend to use their vans almost exclusively on EHU so normally they would not have a leisure battery fitted. If they wanted to stop overnight, at an aire for example, leaving their car and caravan connected, they would flick the second switch on the BIP up and be able to run lights, taps etc. from their car battery. I assume there would have been some system to prevent them discharging the battery to the extent that they would be unable to start the car?

UK imports through Letchlade were upgraded with a BIP SE unit, battery and Schaudt booster as we Brits are more likely to camp away from an EHU. People who import vans from the Continent usually have to modify them to UK specification but not having done this myself, I'm unsure what that entails.

The second switch on the BIP is therefore of no practical use on a UK spec caravan and mine (when it worked as originally intended) was always in the 'off' position. But this switch had no effect on the booster unit which worked only when towing. As my switch has now been modified I'm unable to check again.

It's quite possible that Hymer modified their circuitry between my van and yours but if so, I can't see any sensible reason for connecting the booster to the electrical system when on EHU.

Where's the expert when we need him?