My problem is that I have not had anyone to 'introduce' me to the van. I don't know what half of the electrical stuff is in it and what should be working and how to test it.

I am guessing there is a heating system there, is this one of the things that will only kick in if I am running off mains? How can I check if it is functioning?
What are these things? They seem like old school cigarette sockets (plug in 12v) Should I just remove them? Are they obsolete?

Can anyone give me a little briefing on what they see and what I should expect?
Cheers
Angus