Anyone know what needs to be done to modify my Westfalia towbar so that it runs the caravan fridge when towing. I have the Westfalia control module under the passenger seat, but from a previous look into this I seem to remember that the pin for transferring power to fridge in caravan isn't wired in as factory standard and there is an additional wire that needs to be ignition switched? Any help welcome as we have a long drive down to SW France in the Autumn and would like to use caravan fridge on journey if we can. Thanks in advance.