
My truck has this type of connector but one of my trailers had a 4 pin connector so I had to use an adapter. When the headlights stopped working on one side I decided to replace them with the ones used on the other trailers. I chose this one because it had a nice long cord so I could install it out of sight. As others have mentioned, don't try to match wire colors when replacing a 4-pin connector with this 7-pin connector. Just look at the very clear instructions and wire them like this.

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