4 Pin Light Wiring Diagram For Trailer. The white wire is your ground wire, which must be cut short and. The circuits are for left and right brake lights and running lights.
If any paint work or welding is required, I would recommend doing that first before installing the new As for the wiring diagrams, here is a couple different versions to go with.
The three additional pins are: trailer brakes, back-up lights and trailer battery charging.
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LED lights had been installed on this trailer about a year ago. Even small trailers like this one for towing motorcycles need to be wired to your vehicle. The first thing you need to do is make sure that your connector works The white wire must be attached to the trailer for the grounding and power supply of the lights.