2019 Jeep Cherokee T-One Vehicle Wiring Harness with 4 Aftermarket Trailer Wiring Harness for a 2019 Jeep Cherokee ; For your 2019 Jeep Cherokee, the T-One Vehicle Wiring Harness part # 118779 is a confirmed fit and will work for you. This is a brand new wiring harness that was developed specifically for the 2019 model year and that is all it will fit.5/5(7)Category: Custom Fit Vehicle Wiring 2019 Jeep Grand Cherokee Trailer Wiring | etrailer Fastest shipping available and a lowest price 2019 Jeep Grand Cherokee trailer wiring guarantee. Expert lifetime technical support on all purchases. Complete 2019 Jeep Grand Cherokee Trailer Wiring installation instructions and customer reviews. Call 800-298-8924 to place your order or order online at etrailer.