4 Pin Female Trailer Connector. These connectors are perfect for stepper motors and drivers. Verify the harness color codes at each tail light.
The three additional pins are: trailer brakes, back-up lights and trailer battery charging. These connectors are perfect for stepper motors and drivers. Seven-pin connectors are rarely used on trailers for local use.
There should be a common color for both the tail lights.
These connectors are perfect for stepper motors and drivers.
A number of standards prevail in North America, or parts of it, for trailer connectors, the electrical connectors between vehicles and the trailers they tow that provide a means of control for the trailers. It came from the factory that way. There are options for various lengths of cable.