7-Way Wiring for 2018 Ford F-150 With Factory 4-Way
Updated 10/27/2025 | Published 03/02/2025
Products Featured in This Question
Question:
Hello, I have a 2018 ford f150 with factory 4 pin trailer connector. I would like to upgrade to a 7 pin with added 2 axle trailer brake. I am attempting to avoid cutting any wires if possible. Would you be able to point me in the right direction?
asked by: Cory B
Expert Reply:
Hey Cory! To avoid any splicing you can use the T-One Vehicle Wiring Harness with 7-Way Trailer Connector # 118283. This plugs into your factory wiring behind your bumper for a simple installation. Check out the attached picture. Once your 7-way is installed you will be able to use a brake controller like the # TK75BR you were looking at.
If you find that you don't have power running to the brake controller port under the dash you will also need the # BRK-ELECKIT. I attached some installation videos below for your reference. If you need anything else don't hesitate to reach out in the comments below.
(click to enlarge)
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Search Results: 7 way wiring
- Search Results: etvc7
- Search Results: trailer hitch
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Shop: Power Wire Kit for Electric Trailer Brake Controllers - 12 Gauge
- Shop: Trailer Hitch
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Curt T-Connector Vehicle Wiring Harness with 7-Way Trailer Connector
- Shop: Curt Trailer Connector for Ford and GM Trucks - Backup Alarm - 7-Way Blade and 4-Way Flat
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class IV - 2"
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class IV - 2"
- Shop: Replacement OEM Wiring Harness for Ford F-150
- Q&A: How to Easily Install 7-Way on 2018 Ford F-150 that Has 4-Way
- Search Results: lift supports
- Search Results: lippert electric jack
- Q&A: Can I Install etrailer Hitch e63TR On 2021 Ford F-150 XLT If I Remove OEM Hitch?
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Search Results: trailer wiring
- Video: How to Choose a Trailer Brake Controller
- Article: Trailer Wiring Diagrams
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Shop: Suspension Enhancement
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Article: How to Choose the Right Trailer Hitch Class
- Search Results: trailer tires and wheels
- Video: The Low-Down on the Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Shop: Brake Controller
on Custom Fit Vehicle Wiring
Robin H.
10/27/2025
Hey Cory, how did the upgrade to the 7-way wiring harness on your F-150 turn out? Were you able to get the brake controller working without having to cut any wires? Your update could make it easier for others doing the same upgrade.