2016 Ford F 250 Trailer Wiring Diagram. When you decide to tow a trailer, you need to a install a trailer wiring harness to connect your truck's brake lights to those of the trailer. The wires that run through the firewall are 'customer access' wires (firewall pass through) and aren't for the brake controller.
Remove the drivers/lower dash access panel, look over to the far upper rightand you'll see the dash support braket with. To have a greater peace of mind when driving with a trailer. Get your brake controller and a wiring harness.
Wiring diagrams should be available at www.alldata.com.
When you decide to tow a trailer, you need to a install a trailer wiring harness to connect your truck's brake lights to those of the trailer.
Without the connection, you're at risk for an accident or traffic ticket. To have a greater peace of mind when driving with a trailer. A wiring diagram is a simplified standard photographic representation of an electric circuit.