Nissan Pathfinder Trailer Wiring | etrailer Curt T-Connector Vehicle Wiring Harness Installation - 2015 Nissan Pathfinder. Ryan: Hey, everybody. Ryan here at etrailer. Today on our 2015 Nissan Pathfinder, we're going to be taking a look at and showing how to install the CURT T-Connector vehicle wiring harness with a four-pole flat trailer 2018 Nissan Pathfinder Trailer Wiring | etrailer Call 800-298-8924 to get Expert Service ordering a Trailer Wiring for your 2018 Nissan Pathfinder. Complete installation instructions and lifetime technical support on all Trailer Wiring purchases. Lowest price guarantee on accessories for your Nissan Pathfinder and the fastest shipping available.