7 Pin Trailer Plug Wiring Diagram With Separate Turn Signals. You should be able to easily find a Curt harness that plugs into that pig tail and give you the required wiring plug for your trailer. I was wondering if anyone has a dodge-specific wiring diagram that deals with things like: a purple wire, no yellow, an orange You were looking for the wiring diagram/colors for the truck connectors instead of the trailer plug wiring.
Grab a small UPS battery, some test leads. Posted the question in case someone only had to refer to a wiring diagram for the answers. 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.
Once it sees a circuit it would cut that power.
Various styles of connectors are available with four to seven pins to allow transfer of power for the lighting as well.
Posted the question in case someone only had to refer to a wiring diagram for the answers. In the North American market it is very common for brake lights and turn signals to be combined. One final note, if your towing vehicle has separate brake and rear turn signals.