Small Boat Trailer Wiring Diagram. The yolk connects the ground wires from the lighting circuit to the trailer plug. An up-to-date wiring diagram could save your weekend, your boat, or your life.
Wiring schematics, pictures, best practices and tips to get your boat's electrical systems in shape.
Does anyone have an electrical wiring schematic for my boat?
Most boat trailers and small utility trailers that don't have their own brakes use this kind of harness plug, often referred to as a "flat-four." For more information on towing your boat and whatever else you'd like to link to your vehicle, visit the "Trailer Wiring for the Do-It-Yourselfer." trailerwiring.com. We have amber boat trailer reflectors, red boat trailer reflectors, submersible boat trailer LED lights, side marker boat trailer lights, trailer tail light lenses, boat trailer clearance lights, and more discount boat trailer lights and trailer light wiring harnesses from brands like Sea Sense, Unified Marine Inc. When buying wires for trailers, make sure they are the right thickness to increase durability.






