cigar lighter power source

[getunder]

If I plug an accessory into the cigar lighter which battery is the power being taken from Main or Leisure ? I have conventional electrics unchanged since van built in 1985. Cigar lighter works without ignition key on.
Basic stuff I know but if the Leisure battery is discharged until flat ( I know you shouldn't completely flatten any battery ) then am I correct in thinking that the main starting battery charge level is unaffected.
Simple stuff I know but nobody actually tells you these things you are just assumed to know.

[1664]

Starter battery usually

[pionte]

really easy to check, plug something in then disconnect the leisure battery.

Most people rewire it to the leisure, really easily done and info in the wikki .

[Bonfireboy]

Pionte - I need to wire in a new Cigar lighter socket onto my leisure battery - but for the life of me can't find where on the wiki it explains how? can you (or anyone else) point me in the right direction?
Cheers.

[BALDY3260]

hi bonfire boy try here http://www.brick-yard.co.uk/forum/westy ... 11446.html" onclick="window.open(this.href);return false;

[Bonfireboy]

Thanks for that Baldy. The only problem is that the bloke I bought the camper from thought he was good at electrics - he wasn't. So I'm not keen of moding the existing stuff as I have know idea if it has already been tinkered with. I'm ideally looking for a new (simple) system I can work straight off of the leisure battery. Currently there's a corroded cigar lighter with an inline fuse holder off of the battery but I'm lead to believe this is less then ideal. Any suggestions?
Cheers.