there's 4 or 5 different trailer light plug set ups on the go now, there's the UK version, the European version, the separate French version, the USA version and the Australian version that got put onto a lot of Japanese manufactured cars before they had decided on the orders for what was getting shipped where.....then the sockets got changed over by the dealership here before selling...newer cars have different shaped connectors with more pins......caused a problem for a relative who has an old car and bought a new trailer set up.... you will find the different wiring diagrams for what pins go where on Google....search trailer wiring on google images and the information will come up...