7 Prong Trailer Wiring Diagram. Brown pin for side markers tail lamps and running lights. It may transfer power better so the connector is suggested for higher level electric in the auto.
Here are two wiring diagrams for the 7 pin n type trailer electrical plug. There will be primary lines which are represented by l1 l2 l3 and so on. Heres the diagram for 7 pin connector.
Use the 7 pin connector anyway see below and just leave out the last 2 wires.
If your truck has a built in 7 pin socket but you only need 5 of the pins. White pin to your floor. Click on the image below to enlarge it. Narva 7 and 12 pin trailer connectors comply with all relevant adrs.