Parts Needed to Add Brake Controller to 2018 Jeep Wrangler Without Tow Package
Updated 04/08/2026 | Published 04/03/2026
Products Featured in This Question
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 >
Featured Help Information
Instructions
Continue Researching
- Search Results: accessories and parts
- Search Results: 2" receiver extension
- Shop: Trailer Wiring
- Shop: Trailer Hitch
- Q&A: Does Curt Wriing for a 2024 Jeep Wrangler Require Connecting the Power Wire to the Battery
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Shop: Yakima StraightShot Hitch Extension - 2" Hitches - 7-1/4" Long
- Q&A: Best Way To Add 4-Flat And 7-Way To 2021 Jeep Wrangler Sahara With Curt C96JR Flat Tow Harness
- Q&A: Is 12 Volt Outlet Needed For Curt 4-Way on 2024 Jeep Wrangler
- Shop: Yakima FlipFlop High-Low Adapter - 2" Hitches - 2-1/8" Rise/Drop - 15-1/2" Long
- Shop: Yakima Hitch Receiver Reducer Sleeve - 2.5" to 2" - 10" Long
- Video: Best 2021 Jeep Wrangler Trailer WIring Options
- Video: Let’s Check Out the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector-56407
- Video: How to Install: Curt Trailer Hitch Receiver on your 2018 Jeep JL Wrangler
- Video: Setting Up Your Curt T-Connector Vehicle Wiring Harness - 2025 Jeep Wrangler
- Video: Comprehensive Review: Curt Hitch Extender for 2" Hitch Receivers
- Shop: Curt Hitch Extender for 2" Hitch Receivers - 8" Long
- Shop: TrackTowers for Yakima Crossbars and Platforms - Track Mount - Qty 4
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Search Results: trailer hitch
- Search Results: trailer wiring
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Article: Trailer Wiring Diagrams
- Video: The Low-Down on the Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Shop: Suspension Enhancement
- Search Results: trailer tires and wheels
- Article: How to Measure for Trailer Hitch Drop
on Trailer Brake Controller
Terry L.
4/8/2026
Robin I will be towing a small camper