Whether you are towing a large caravan, or just using a cycle carrier you will need some electrics with your towbar (there are 3 types of towing electrics; single 12N, twin 12S, and 13 pin).
As you can see it can be a little complicated, as can modern vehicle electrics, can bus, multiplex and advanced are some of the systems we work with. That's why we like to keep it simple. All we need is the make/model/year of your car/van and we'll do the rest. (or fill the menu on the right >>>)