Unfortunately we do not have an adapter to go from a European 13-way trailer connector to a U.S. style 4-way trailer connector. European trailers typically have separate brake light and turn signal circuits, but U.S. trailers use a combined wiring system that use one wire for the turn signals and brake lights.
You could make an adapter using a universal 4-way flat tail light converter like part # HM48925v, but you would need to find a European trailer side 13-way connector that can be... view full answer...