Hi, have fitted a tow bar and 13pin socket to my 2015 Evoque SD4 Dynamic Lux Auto, removed from my old Evoque Pure Tec. I now find the fridge in the caravan not working while traveling and have checked 13pin socket and find no power to pin 10 which supplies the fridge when the engine is running. Socket has dedicated wiring which plugged into sockets at nsr of vehicle. Do i need a recode or relays etc. Thanks for reading and any advice given.