Hi there, I am planning on making a special trailer wiring adapter which converts from an Australian vehicle (which always has yellow turn signals) to an American trailer (which in most cases has red stop/tail lights/turn signals combined). This is just in case I'm planning on taking my own car to the USA (which can require special paperwork to be done). I am intending to wire an American 4-pin flat socket to an Australian 7-pin flat plug. An electronics retailer called Jaycar has the American plug/socket for only $8. https://www.jaycar.com.au/4-pin-wired-multi-pin-plug-socket/p/PP2030 Here, this is an example of an Australian registered car in the USA: This is because I want to keep the Australian trailer socket on the vehicle. Thanks.