Grey auxiliary cable damaged.

The auxiliary (grey ) cable sustained damage and had to scotch clip three wires. In the cable are following Wires/ conductors.
Thick: white green yellow yellow black
and one thin white.

Power board is PMS 7 none of the book diagrams show this second thin white so no idea what its serving. Eventually when we get home from holiday I will have to proper repair or replace. This could be for you Good, luck a mind of information.
Many thanks

Bob UK, July 2017

Do a simple Google search for "caravan socket pinout"

If you can't get into the socket/plug to see where the wore goes you can always use a battery and bulb to trace which pin feeds out onto which piece of wire

acp, July 2017