Electrical Pin 2 on 12 pin plug

[poor but proud]

But you will after your first melt down with your 12 pin plug/socket!!! And sooner than you think if the connection (pins) become loose when you are travelling.

my bets on the fridge wire and pins

 

[Boots in Action]

my bets on the fridge wire and pins

@poor but proud , especially if the same wire to pin 9 not only runs fridge, but it also carries current from DC to DC line in tug for charging/supplying power to van battery!!