4 Pin To 7 Male Pin Trailer Adapter Wiring Diagram. Verify the harness color codes at each tail light. This requires a wire from the controller to the trailer brake. (This is why some connectors have as many as seven pins, to make provisions for the.
Those with lead wires and a male and female leads are sold at a higher cost. You were looking for the wiring diagram/colors for the truck connectors instead of the trailer plug wiring. The first step in wiring your trailer cables is to ground the white cable first.
Wiring Diagram for black, yellow, green, blue.
Wiring your four-pin trailer can be a challenge when you first do it, but it's a simple do-it-yourself task.
Seven-pin connectors are rarely used on trailers for local use. Cut the four-pin plug off of the trailer harness. Are the trailer tail lights LED?