There are two types of 7-way trailer wiring connectors. One has flat pin and the other has round pins. The following schematic shows a Typical 7-Way Trailer Wiring Diagram. It should be noted that the center terminal is labeled as an auxiliary circuit but is most commonly used for backup lights not as a ground terminal as many try to use it.

7-Way Trailer Wiring Diagram

7-way trailer wiring diagram

7-Way Trailer Wiring Diagram Color Code

Color
white
blue
green
black
red
brown
yellow

Circuit Function
common ground
electric brake
tail/running lights
battery charge
left turn/stop
right turn/stop
auxiliary/back up



Related Post

1996 Suzuki Sidekick Wiring Diagrams
Honda Prelude IV (92-96) Electrical Wiring Diagram
2004 Nissan Murano Z50 Starting Charging System Service and Troubleshooting
Jeep CJ2A Electrical Wiring Diagram
2008 Ducati 848 Electrical System Wiring Diagram