Trailer Wiring Harness Installation - 2015 Jeep Cherokee Oct 21, 2015All right, everything's working as it should. THat's going to complete today's installation of the tow ready T1 vehicle wiring harness with the 4 pole flat trailer connector. Part number 118605 on our 2015 Jeep Cherokee.4.5/5(43)Category: Custom Fit Vehicle WiringBrand: Tekonsha 2015 Jeep Grand Cherokee Trailer Wire Harness and Connector Equip cars, trucks & SUVs with 2015 Jeep Grand Cherokee Trailer Wire Harness and Connector from AutoZone. Get Yours Today! We have the best products at the right price.