Recommended Flat Tow Wiring Harness for a 2023 Jeep Grand Cherokee 4XE

Updated 10/24/2025 | Published 04/07/2025

Products Featured in This Question

Curt Universal Tail Light Wiring Kit for Towed Vehicles - 4-Way Flat Connectors

(135)

$96.02

Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord

(3561)

$173.56

Roadmaster Battery Charge Line Kit for Towed Vehicles

(1447)

$52.55

Roadmaster Smart Diode Kit for Variable Voltage LED Tail Lights - 7-Way to 6-Way Adapter Cord

(376)

$240.74

Question:

Hello, We previously purchased a Roadmaster flat tow system for a 2020 Jeep Grand Cherokee. We have change vehicles and now have a 2023 Jeep Grand Cherokee 4XE. I need the Jeeps 6 Pin to vehicle charging to brake - turn signal wiring and diode packs. At this time I will not install a braking system as out Fleetwood 39Z Bounder has ample braking to handle the Jeep. Plus there is the additional problem with lack of space under passenger seat where Jeep Brake Controller would normally be installed. I am also considering air brake as we have air brakes but am not familiar with that equipment/installation needs. FYI: I have extensive heavy and auto mechanics and electronics knowledge so running individual wires, soldering, weather proofing etc is easily in my wheel house. Can you please provide the part numbers for the Jeep electrical needs so I can connect the 6 pin coiled cable to charging the Jeep while towing to brake/turn signal as well as the front baseplate with arms fro the 2023 4XE and we have front hooks installed. Please advise as soon as possible. Thanks Carl Can you please provide the cost

asked by: Carl F

Expert Reply:

Hey Carl, since you didn't outright mention it I'm assuming you don't have the ParkSense feature so you'll just need the Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles # RM-15267 with the Chare Line Kit # RM-156-25.

If you do have the ParkSense feature, then you'd want the Roadmaster Smart Diode Kit for Variable Voltage LED Tail Lights # RM63MR instead.

If you need any other components for the flat tow, please let me know in the comments and I'd be happy to help!

expert reply by: Bryce D

Jon G.

10/22/2025

Hey Carl, how did things go with the Roadmaster wiring and charge line kits for your Grand Cherokee 4XE? Your setup could really help others working on similar flat tow wiring. Sharing what worked might guide the next person tackling this upgrade.

Carl F.

10/23/2025

@JonG We chose to have the dealership install the RoadMaster system into our new 2023 4XE. Yes it is 2025 but this was sitting on their lot and they made us an offer we could not refuse The dealership did an excellent job installing. I would highly recommend Rock City Chrysler Jeep in Little Valley NY to do RoadMaster installations. Way better experience then when CW messed up our RV wiring harness causing significant delays and future problems due to their failings. Much improved brake indication. For us it was more than worth the drive. Carl