2002 Mobilvetta Driver 52 Split charger

Hi - perhaps you've resolved this now, but I wonder if the mystery terminal is the D+ line which energises when the alternator is showing positive output?

We have just bought a Mobilvetta Top Driver 62 year 2000 and I'm trying to find my way around the electronics. I've emailed CT Elettronica for any available tech info but not heard back yet. Happy to share anything useful - so far I've only gleaned a couple of snippets here and there off the web. I do have a manual for the van but only has a very simple overview of the electrics.

FWIW my newbie impression is that in it's day it was a quality build and the electrics look well speced and installed. Our charger is marked up as model "ALIM6" and is rated at 300W input with output marked as 20A max and 13.8V DC. The output looks like it supplies the leisure battery and the control panel in parallel. 

I'll try and add some reduced size pics later. 

If if you have any pics of yours, including inside the casing I'd be interested to see them. 

Update - CT Elettronica could not help. They assigned all their Motorhome intellectual property rights to Mobilvetta in 2005. I've redirected my enquiry to Mobilvetta. Will let you know progress. 

PS - I forgot to say: are your fuses blowing because they are not "time delay" specification? On my charger the fuse rating is marked as T2A - I think this might mean time delay is required?

TB2

Thanks for the responses.  The delay in my response is that I fitted a Durite 0-647-20 charger that appeared to work but has now failed.  I've just had my Driver 52 habitation service done at Spinney in Queensferry but they say that the Durite charger is not charging the leisure battery.  There is a 240 volt AC input but no output.  I haven't spoken to the service engineer yet but they seem to think that the problem is the charger and not the wiring circuit.  The engine alternator seems to be charging the leisure battery via its relay but I'm not even sure of that as the only run I've been on is the 15 miles to Spinney from my home on the Wirral.   I didn't have any problems with fuses blowing except the two glass fuses inside the old CT Eletronnica unit.  I think that the original problem with the Eletronnica unit was water ingress, as the charger sits above the motorhome entrance door and the vent cap had been knocked off by a low-hanging branch in France.  I have replaced it but I think that water had got in.  I think that I will have to get back in touch with Durite as the charger is within its 12 month warranty period (I hope!).