T25 Devon Campervan what is the small socket near Zig unit.

[stuartgpalmer]

I have a 1986 T25 Autohomes Kamper campervan:

http://www.devoning.co.uk/our-camper-vans/the-banana/" onclick="window.open(this.href);return false;

It has this strange socket next to the water tank level indicator (pictured below). I have no idea what this is for, though by the gauge of the wire it looks like it could have originally been used for some sort of speaker. Please could somebody tell me what it is for. I'd love to get it working again.

Thanks

Stuart

[Oldiebut goodie]

Old caravan style 12v socket by the look of it - check it out with a multimeter.

[kevtherev]

I use mine to plug in the CB