2019 Chevy Equinox Hitch Wiring | Harnesses, Adapters Chevy Equinox 2019, Towing Wiring Harness by Tekonsha®. One-year warranty. 4-Way Flat. Wire up your tow vehicle and trailer with whatever it takes to get your trailer lights on, the electric brakes slowing down, and the trailer battery.. Chevrolet Equinox Trailer Wiring | etrailer Tekonsha T-One Vehicle Wiring Harness Installation - 2019 Chevrolet Equinox. Speaker 1: Today on our 2019 Chevrolet Equinox, we're gonna be taking a look at and showing you how to install the Tekonsha T1 Vehicle Wiring Harness for factory tow package with a 4 pole flat trailer connector.