7 Way Round Trailer Connector Wiring Diagram. Trailer plug wiring is standardized across all vehicles, no point trying to find vehicle specific info. Any vehicle towing a trailer requires trailer connector wiring to safely connect the taillights, turn signals, brake lights and other necessary electrical systems.
Determine which color wire supplies constant power to the ignition switch. I was looking for a diagram to actually give him something to look at and then posted right on top of the others. The Diagram below shows the proper way to wire the connector to your trailer or vehicle.
The Diagram below shows the proper way to wire the connector to your trailer or vehicle.
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The trailer wiring diagrams listed below, should help identify any wiring issues you may have with your trailer. The Trailer Wiring Diagram and Connector Application Chart. Look at the wiring diagram for your truck's ignition switch.