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Adding a 4-Way Flat Trailer Connector to a Harley with 5-Way Round Trailer Connector  

Question:

I have a harley with a five pin on it my trailer and other bike have flat four is there a pre made adapter for this or do I have to make one with the trailer end I just ordered?

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Expert Reply:

The 5-Way on your Harley might actually have separate circuits each for brake lights, left turn signal, and right turn signal. A 4-Way will have the brake lights and turn signals on the same circuits. To tow a trailer that has combined wiring with a motorcycle that has separate wiring I recommend converting the Harley connector to match the other bike and the trailer.

All you will need is a converter, # 119178. On the input side you will connect the wires from the bike's 5-Way. The red wire on the converter is brake lights, green is right turn signal, yellow is left turn signal, brown is running lights, and white is ground.

If you don't want to remove the 5-Way on the Harley you can just tap into the wires. Just make sure to keep the unused connector covered so it doesn't get wet or corroded and cause a short.

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Michael H

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