7 Round Trailer Connector Diagram. Custom fit to FCA US LLC wiring specifications. 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.
In the North American market it is very common for brake lights and turn signals to be combined. So I want to be sure before I spend this kind of money on a harness. Seven-pin connectors are rarely used on trailers for local use.
I drew this crude diagram to help explain.
The three additional pins are: trailer brakes, back-up lights and trailer battery charging.
The running lights come on when the lights are turned on but all trailer lights go out when the b. Having the various pinout diagrams available is vital to troubleshooting and/or repairing truck and trailer wiring. Trailer Connector Wiring Diagrams - Free download as PDF File (.pdf), Text File (.txt) or read online for free. diagramas.