How to Wire and Install a 4 Pin to 7 Pin Trailer AdapterExplore further
A 7 pin connector is a simple device that has 3 more functions than the 4 pin version. Not only does it handle the same tasks as the 4 pin- running lights, left turn signal and brake lights, right turn signal and brake lights, and ground, it comes with the ability to run the trailer's 12-volt system, reverse lights and electric brake.. That is how the 7 pin connector got its name.
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