Hello,
Looking for some advice. I have a 70 Chevy pickup that I would like to tow a European car trailer with but have a wiring problem. The US wiring consists of 4 wires 1.) reverse lights 2.) Right turn signal/brake 3.) Left Turn signal/brake 4.) Running lights.
Obviously, for a European trailer I need separate signals/wires for each blinker, brake lights, and running lights and I have combinations that need some sore of separation.

The rear lights consist of two bulbs on each side, one for the reverse light and the second (with dual filament) for brake/turn signal and running light. I don't think that I can get a separate turn signal and brake signal from the fuse box. Does anyone know how to add to the wiring to achieve separate signals for turn, brake and running lights so that I wouldn't have a trailer with a blinking brake light or turn signals lighting with the brakes? If someone is an electrician with experience working on old US wiring, I would appreciate some experience and/or a wiring schematic with any type of relays, etc. that I could add to make the trailer wiring work correctly. I don't want to change any of the standard circuits on the truck and would be looking to add functionality.

Thanks,
Alex