Wiring 4-Way Connector on Ford Truck to 6-Way Connector on Camper Trailer
Updated 10/20/2009 | Published 10/18/2009
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Question:
If I use a 4 pin adapter on my Ford Truck to a 6 pin connector for the trailer how do the two additional wires get wired into the truck end? I know it is the red wire and blue brake wire that needs to be connected. I just am not sure how that happens. Do I have to splice it into the wiring on the truck or do the wires splice into the existing 4 wires on the the 4 pin plug? I hope I made sense with my question. My truck has a 4 pin flat connector and the trailer has a 6 pin connector.
asked by: Liz F
Expert Reply:
The two extra wires on your trailer supply power from the vehicle to actuate the electric brakes and any electrical accessories you might have on the camper. The blue wire typically provides power to the brakes, and the red wire is for the 12 Volt accessory circuit.
You have several different options, depending on the trailer and the connector that is currently on it. If you have a Jayco trailer, we offer a 4 Way Flat to 6 Way Round adapter # A10-6034VP and then a 6-way round to 6-way Square Adapter, part # HM47415.
If the trailer connector is square, like the connectors on the 6-Pole Square Trailer Wiring Connector Kit part # 37995, you could use that part in conjunction with the 4 pole Trailer End Connector, part # 18004 to make an adapter. You would cut off the unnecessary end of the connector, and wire the 4 way color for color to the 6-way square connector, with the red and blue wire remaining. As I mentioned above, the blue wire would carry the output from a brake controller to actuate the trailer brakes and would connect to the blue output wire on the brake controller. The red wire would provide 12 Volt power to the trailer. The red wire would connect to the positive battery terminal via a 40 amp inline circuit breaker, part # 9510.
If the trailer has the 6-way round connector, you would use the 4-Way to 6-Way Trailer Wiring Adapter, part # 37175. The extra wires would connect as described above.
