Parts Needed to Add Brake Controller to 2018 Jeep Wrangler Without Tow Package
Updated 04/08/2026 | Published 04/03/2026
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Question:
I have a 2018 Jeep Wrangler without a factory tow package. I would like a 7 way wiring harness with a brake controller. What part numbers would I need to purchase? Thank you
asked by: Terry L
Expert Reply:
Hey Terry! To add a 7-way and brake controller you need to start with a 4-way. The Curt T-Connector Vehicle Wiring Harness # 56407 plugs into the connection points behind your tail lights and allows you to power the lights on your trailer.
To upgrade the 4-way to a 7-way you need the Universal Installation Kit for Trailer Brake Controller # ETBC7. This comes with the adapter, wiring, and everything else you need to add a 7-way to your Wrangler.
Then for a brake controller I recommend the Redarc Tow-Pro Liberty # RED52VR. The Liberty is simple, reliable, and won't take up space in the cab of your Jeep. The main unit sits behind the dash so only the control knob is visible, giving it an OEM look. This comes with a universal wiring harness that will tie into the # ETBC7 to complete your installation.
What will you be towing with your Wrangler?
(click to enlarge)
Product Page this Question was Asked From
Redarc Tow-Pro Liberty Brake Controller w/ Universal Wiring Harness - Dash Knob - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Splice-In
- Dash-Mounted Knob
- Behind-Dash
- Up to 2 Axles
- Indicator Lights
- Single Trailer Only
- Redarc
more information >
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on Trailer Brake Controller
Terry L.
4/8/2026
Robin I will be towing a small camper