A 7 way has these functions and a 12 volt circuit a circuit for electric trailer brakes requires a brake controller in the vehicle and a reverse light or auxiliary power circuit. The remaining color is the ground wire.

5 Wire Trailer Wiring Diagram To 7 Pin Plug H1 Wiring Diagram
4 wire trailer to 7 pin plug. Wiring diagrams 17384 views. Autosonic 7 way blade to 4 way flat trailer adapter female trailer connector plug 7 pin to 4 pin trailer converter flat connection weatherproof 48 out of 5 stars 97 999 9. The left and right turn signal lights should each have a different color. Cut the four pin plug off of the trailer harness. By law trailer lighting must be connected into the tow vehicles wiring system to provide trailer running lights turn signals and brake lights. A 4 way trailer connector has the basic lighting functions only.
Some trailers come with different connectors for cars and some have different wiring styles. The basic purpose remains the same whether your truck and trailer is using a 4 way 5 way 6 way or 7 way connector. Boat trailer wiring diagram 4 pin duration. If you follow our trailer wiring diagrams you will get it right. Trailer electrical connectors come in a variety of shapes and sizes. This accounts for three of the colors in the wiring harness.
7 and 4 pole trailer connector with mounting bracket has high impact abs plastic construction stainless steel spring for easy cover operation rubber gasket provides weather resistant. Autosonic 7 way blade to 4 way flat trailer adapter female trailer connector plug 7 pin to 4 pin trailer converter flat connection weatherproof 48 out of 5 stars 100 799 7. There should be a common color for both the tail lights. Running lights left turn signal and brake lights right turn signal and brake lights and ground. This article shows 4 7 pin trailer wiring diagram connector and step how to wire a trailer harness with color code there are some intricacies involved in wiring a trailer. Wiring a 4 way hitch plug to a 7 way trailer is not a difficult thing to do but it will not power all the circuits that are connected when the trailer is plugged in to a vehicle with a 7 pole connector.
Verify the harness color codes at each tail light. How to wire a 7 pin trailer plug diagram shown duration. For long term use the connector on the vehicle should be replaced with a properly wired 7 pole connector. This 7 and 4 pole trailer connector eliminates the need for an adapter and allows you to tow a trailer with either a 7 or 4 pole plugsocket connects to your vehicles oem wiring system.