Nissan Frontier Trailer Wiring | etrailer Tekonsha T-One Vehicle Wiring Harness Installation - 2018 Nissan Frontier. Today on our 2018 Nissan Frontier, we're going to be taking a look at and showing you how to install the Tekonsha T-One vehicle wiring harness with 7-way trailer connector. Nissan Frontier Trailer Wiring Harness | Advance Auto Parts Advance Auto Parts has 1 different Trailer Wiring Harness for your vehicle, ready for shipping or in-store pick up. The best part is, our Nissan Frontier Trailer Wiring Harness products start from as little as $28. When it comes to your Nissan Frontier, you want parts and products from only trusted brands.