How to Add a 7-Way Connector and a Brake Controller to a 2015 Kia Sorento
Updated 07/02/2025 | Published 06/09/2025 >
Products Featured in This Question
Question:
I have a tow vehicle with a 4 pin connector I got from you guys. Works well. I am considering buying a hiker trailer with elec brakes. What do I need to get to make that work?
asked by: Michael D
Expert Reply:
Hey Michael, welcome back! You'll need to add a 7-way connector and a brake controller to pull a hike trailer with brakes.
To add a 7-way connector to your 2015 Kia Sorento you'll need the Universal Installation Kit for Trailer Brake Controller item # ETBC7. The kit includes a pre-wired 7- and 4-way trailer connector that mounts easily at the rear of your vehicle with an included bracket. This kit is designed for use on a vehicle, like yours with an existing 4-way flat trailer connector and plugs directly into it.
You will then connect the blue wire to the blue wire on the brake controller, connect the black wire to the positive post on your Kia's battery, the white wire to ground, and the yellow wire to vehicle's reverse circuit if applicable. This will provide you with the ability to control your trailer's brakes and also provide you with a 12v power wire for you trailer's accessory lights.
For a brake controller, I recommend the Tekonsha Prodigy P2 item # 90885. This is a proportional brake controller that stops or slows your trailer with the same amount of intensity and force your Kia is using. The included harness will get you all set up.
What year hike trailer are you getting?
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Brake Controller
- Video: Mount: Universal Installation Kit for Trailer Brake Controller on a 2016 Kia Sorento
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Video: How to Choose a Trailer Brake Controller
- Shop: Trailer Hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer hitch
- Video: Redarc Tow-Pro Liberty Brake Controller Review RED24FR
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Shop: Trailer Wiring
- Article: Trailer Wiring Diagrams
- Search Results: trailer wiring
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: Parts Needed to Install a Red Arc Brake Controller in a 2023 Toyota Tacoma
- Video: What to Know About the Curt TriFlex NEXT Trailer Brake Controller
- Shop: Suspension Enhancement
- Search Results: trailer tires and wheels
- Shop: Redarc Tow-Pro Liberty Brake Controller w/ Universal Wiring Harness - Dash Knob - Proportional
- Q&A: What Gauge Wire Should be Used to Wire Trailer Brakes
- Search Results: trailer hitch ball mount
- Article: How to Measure for Trailer Hitch Drop
- Shop: Curt Echo Wireless Brake Controller - 7-Way Plug-in w/ Bluetooth App - Up to 2 Axles - Proportional
- Video: Feature Breakdown: Universal Installation Kit for Trailer Brake Controller
- Q&A: What is the Difference Between the Tekonsha Prodigy P2 and the P3 Brake Controllers
- Video: Clean Up Your Trailer Wiring
- Article: Brake Controller Installation: Starting from Scratch
- Shop: etrailer Anti-Rattle Hitch Collar for 2" Hitch Receivers
- Shop: Gooseneck Hitch
- Search Results: trailer jack

Michael
7/1/2025
Purchasing a new trailer and want to have this ready to go for pickup. Thanks for the advice. I will let you guys know how it goes. - MD