2004 Auto-Sleeper Polensa blown fuse.

I don't know the Pollensa specifically, but there's a good chance that the 30A fuse is the main fuse for the leisure battery - without which there would be no supply to any of the 12V internal appliances, typically - and the 15A fuse is the supply to the fridge 12V element, which is intended to operate only when the engine is running.

Under normal circumstances there should be no reason for the fuse to blow when hitting a large bump in the road. The "typical" reason for this fuse to blow is when the leisure battery remains unused for a long period and gets to a low state of charge. When the engine is started the split charge relay connects the engine battery and alternator to the leisure battery, too much current tries to flow into the leisure battery and the fuse blows.

When you refer to "the empty fuse holder" do you mean the one that had a 15A fuse in it before you moved it, or another fuse holder?

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I tried to send a photograph of the fuse "box" but it didn't work.

Many thanks for your information. Looking down on the fuses when the driving seat is pulled forward shows a box about 2 inches square.
The 15A fuse is on the left in the box. Next to it is the 30A and the third space is empty so I would be interested to know if a fuse is supposed to be in that access point. As a matter of interest the cooker ignition is not working.
By the way, the leisure battery was probably in a poor state of charge due to lack of use. I have been trying to find someone local to fit a solar panel on the roof for a year to take care of battery charging. Two mobile caravan mechanics looked at the job and never came back.

It's not uncommon for A/S to fit a 3-way fuse block and only use 2 ways - our Trooper is exactly like that. The giveaway is to look into the slots and see if there are any metal contacts inside, or look behind and see if any wires lead to that fuse way.

Many thanks for your information which answers my question. I will go and look as I should have done at first. I'm learning still at 85.

Hi BML, we have a 2006 Pollensa with three fuses in that block, 15, 30 and 25 amp so I would expect yours to be similar.  I had fun and games with ours as, like you, all our electrics failed. I pulled out the 30A fuse, which was fine. I swapped with another 30A fuse, no difference. It took me a lot of investigation to discover that the good 30A fuse was in the wrong slot! In the past someone had been playing find the lady with the fuses.  FYI I'm attaching a photo of our changeover relay showing the relay and the three fuses. I'm also attaching a wiring diagram for our Pollensa. The Changeover Relay can be seen on the right hand side of the diagram. I hope this is helpful.

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Many thanks for your detailed information showing, yellow, green and blue fuses. Mine has no yellow fuse at all and I have no idea which way those fuses should go in the three fuse box so I will find an motor electrics specialist to ask them to check it out. Thanks very much again. Regards Brian L

My apologies but I find the drawing of the wiring loom difficult to read.