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

Daewoo Tico Body Electrical Wiring Diagram and Harness (92)
1993 Jeep Grand Cherokee ZJ Ignition off Draw
First Best Guitar Wiring Diagram Site
Honda CR-X Wiring Diagram and Electrical System (90)
1992 Lexus SC400 Charging Circuit and Wiring Diagram