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Trucks that came from the factory with basic 4-flat trailer wiring can't run electric trailer brakes or charge a trailer battery, and factory harnesses that do have a 7-way connector eventually fray or get damaged. This Tekonsha harness for the 2015-2020 F-150 plugs straight into the existing vehicle connectors to solve both problems.
Because it connects directly to the factory wiring points, this harness is a same-day install for anyone adding a trailer brake controller or replacing worn factory wiring.
