towbar electrics

Hello everyone! I’m shopping around for our first caravan and as a first time tow-er have a few questions if anyone would be kind enough to help me with? I have a 2013 VW Tiguan with a drop-down tow bar and sideways 13-pin socket. I’ve bought one of these (cheapo) 13 pin socket testers which...

A commonly posted generic question but I've not found one that matches the lower ones detailed here so hopefully of use to others who have these if answers can be found... I must stress that my only concern is for my caravan’s fridge operation but hopefully this will become clear. I...