Best flat tow wiring for 2012 Jeep Liberty

Updated 04/28/2026 | Published 04/19/2026

Products Featured in This Question

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

(3514)

$165.27

Demco LED Tow Light Bar for Towed Vehicles w/ Wireless Transmitter - 12V Power

(21)

$429.00

Question:

Hi. Looking to flat tow 2012 Jeep liberty. Please suggest product for wiring rv wire harnes that incorporates a tow plug at back of jeep slong with towing signal lights

asked by: gary l

Expert Reply:

Hi Gary, great question and I can definitely help you get set up the right way so everything works cleanly and reliably.

For your 2012 Jeep Liberty, the best wiring option for what you’re describing is the Roadmaster diode kit part # RM-15267. This kit ties into your Jeep’s existing tail light wiring and gives you a dedicated plug at the front of the vehicle so your motorhome can control the brake lights, turn signals, and running lights just like it should while towing. It’s a very clean setup and once it’s installed, you don’t have to think about it again, which is what most people are after.

If your goal is specifically to have a plug at the rear of the Jeep instead, there isn’t a traditional hardwired kit that adds a permanent rear tow plug for flat towing. In that case, a really good alternative is the Demco wireless tow light system part # DM36MV. This plugs into a 7-way at the back and uses a wireless transmitter, so you get working signal lights without tapping into the Jeep’s wiring at all. It’s a great option if you want to keep things simple and avoid any risk of wiring issues.

Since you mentioned flat towing, I do want to quickly confirm that your Liberty is a 4WD model with a transfer case that has a Neutral position, because that’s required for safe flat towing.

If you want, I can also help you build out the full setup with base plates, tow bar, and braking so everything works together seamlessly.

Where are you hoping to take the Liberty once you’ve got everything set up?

expert reply by: Heather A

Gary L.

4/24/2026

Hi Heather A. The wiring first is what I will order. I was looking for this to incorporate a plug to install at rear of jeep also, an all in 1 Sounds like u don’t have such a harness. Thanks for your assistance Btw. Utah Gary Lawson

Gary L.

4/27/2026

Thx Heather! Please email me airhose Brake connection kit from rv to jeep. Do u sell the wiring kit without coiled cable from rv to jeep? Regards Gary Lawson

Heather A.

4/28/2026

@GaryL Hi Gary, thanks for the follow-up, happy to help clear this up. If you don’t need the coiled 7-way to 6-way adapter cable, you can absolutely piece this together instead of buying the full kit. You’d want the Roadmaster Diode Kit # RM-152 along with the vehicle-side 6-way plug # RM-910030-7. That gives you everything needed to wire the Jeep for flat towing lights without including the umbilical cord. The diode kit comes with the wiring, connectors, and hardware to tie into your tail lights cleanly. As far as having a single plug that handles both flat tow lighting and a rear trailer connection, there unfortunately isn’t a true all-in-one setup that does both. Those are typically handled as two separate systems if you need both front and rear connections. For the braking side, if your motorhome has air brakes, the Air Force One system # SM99243 is what you’d be looking at. That will give you the air hose connection between the RV and Jeep for a clean and fully integrated braking setup. Let me know if you want help tying all of this together or making sure everything matches your motorhome setup.