Trailer Light Adapters Diagrams. Installing the 4 pin trailer wires. This is a wiring diagram for a 12n 7 pin standard trailer.
Click on the image below to enlarge it. You must check the trailer manual to see if the wiring is correct but normally the white wire is called the ground wire while the brown wire is used for tail lights. Socket and plug are keyed.
Due to this there are unified vehicle outlets on the market that combine these two into a single module.
Click on the image below to enlarge it. Green pin yellow pin for appropriate brake light and right turn markers. Spurtar 7 pin 7 way round rv style flat blade trailer light plug replacement end towing wiring connector male end 12v towbar 40 out of 5 stars 117 759 7. 12v ignition on battery charging or fridge.