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Connecting Trailer Side Marker Lights to Trailer Wiring Harness

Question:

I have everything set up, lights mounted, wire running through the tongue. But I cant figure out where do I connect the black wire from the side markers. All I have coming from the wire harness is the brown, green and yellow wires. Where do I connect the black wires? Thanks

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Expert Reply:

The marker lights would tie into the running light circuit, which is carried by the brown wire on the trailer wiring harness.

I've linked you to a trailer wiring diagram, and also to our trailer wiring FAQ article.

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expert reply by:
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Mike L

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