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Every couple of years I find that the trailer wiring connector (7 pin) on the back of my truck doesn't work properly, causing the brake or turn signals on the trailer to not function. This is caused because the wires and screw-down connection in the plastic housing totally corrode away over the course of 18-24 months. The visible side of the connector often looks ok (below). But, once that entire center section (with all the metal contacts) gets pulled out, you see nothing but corrosion.

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Is there a way to solve the corrosion issue? Or, more simply, is there a different style 7-pin connector that doesn't suffer from this problem?

Sean Reifschneider
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JeremyP
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2 Answers2

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When you install a new connector, coat the exposed metal surfaces with dielectric silicone grease. This will keep out moisture and slow corrosion. You can also just squirt the stuff in to the connector. It might be messy, but things will still work fine.

Jay Bazuzi
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I haven't used one of these, so I can't speak from personal experience, but this connector looks promising. I found a review of the connector, I have no idea how independent it is, but it goes into the build details.

Sean Reifschneider
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