Trailer Adapter Plug Wiring
In most areas of the United States, a trailer is required to be wired with working signal lamps and side marker lights. However, since many trailers are kept outside and are exposed to the elements, existing trailer wiring harnesses may become frayed or otherwise non-functional.
Fortunately, trailers are typically wired according to a standard wire-color convention. Each different wire color represents one function of the trailer lighting system. If you have to rewire a trailer plug, following this convention makes it relatively simple to replace an existing plug.
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Things You'll Need
- Trailer
- Four-way trailer-side wire harness
- Electrical pliers
- Crimp-type terminal splice connectors
Instructions
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1
Cut the existing adapter plug off the trailer signal wires. If possible, leave at least four inches of slack for each colored wire.
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2
Place a terminal splice connector over the trailer's green (right turn signal) wire so that the wire fits snugly inside the gap of the splice connector. Insert the green wire from the replacement trailer-side harness into the hole on the narrow side of the splice connector. Crimp the metal part of the connector to create the electrical connection. Close the plastic flap to seal the electrical joint.
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3
Place a splice connector over the trailer's yellow (left turn signal) wire. Insert the yellow wire from the wire harness into the hole on the narrow side of the terminal splice connector. Crimp the connector to create the wire joint, and close the connector flap.
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4
Place a splice connector over the trailer's ground (white) wire. Insert the harness white wire into the splice connector hole. Crimp the connector to the wire joint, and close the flap.
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5
Place a splice connector over the brown (marker lamp) wire. Insert the harness brown wire into the splice connector hole. Crimp the connector to the wire pair, and close the flap.
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References
- Photo Credit boat trailer image by wiladayvo from Fotolia.com
