Recommended Trailer Wiring Harness For A 2021 Jeep Grand Cherokee  

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For your 2021 Jeep Grand Cherokee I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118727 if you do not have the factory tow package. This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located behind the tail lights on both the driver's side and passenger's side. You will need to remove the tail lights to access this harness. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery and insert the provided fuse.

Once installation is complete, the 4-way connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket like # 18144 is recommended to keep the connector secure.

If you already have the factory tow package and just need to add a 7-way connection you can simply install the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Pole Flat Connectors # C55774. This custom-fit connector plugs into your vehicle's factory tow package wiring harness, which is located behind the rear bumper, on the driver's side. Once installation is complete, the connectors will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket is included to keep the connectors secure.

I've attached videos below that will walk you through these easy peasy installations.

expert reply by: Kevin C

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