Troubleshooting Brake Lights Not Working After 4-Way Install on 2016 Ford Edge
Updated 02/17/2026 | Published 06/10/2024
Products Featured in This Question
Question:
Hi I bought a curt hitch and wiring harness for my 2016 ford edge I got it all wired and hooked up but brake lights on the plug won’t work? I called curt and they sent a new wiring harness and same thing again. What am I doing wrong? All other lights work even brakes lights on car.
asked by: Brittney C
Expert Reply:
Hi Brittney; since the second wiring harness didn't work it sounds like it probably isn't the wiring harness itself, although it is possible. Because everything else works and the signal comes from the tail lights I would double check your ground connection. Especially if you used the same ground point the second time. Make sure it is nice and secure on a clean, bare-metal surface.
It also wouldn't hurt to make sure the connectors are completely seated. You can unplug them and plug them back in until they click into place. If all that checks out you can see if Curt will send you a third replacement. Make sure you have the # C56272 if it is an SE or SEL and the # C56292 if it is a Sport or Titanium.
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- Powered Converter
- No Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- Hidden
- CURT
more information >
Featured Help Information
Instructions
Continue Researching
- Shop: Trailer Wiring
- Shop: Trailer Hitch
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Video: Curt T-Connector Vehicle Wiring Harness Installation - 2022 Toyota Tacoma
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Video: DIY Install: etrailer Trailer Hitch Receiver on your 2023 Toyota Tacoma
- Video: Installation Guide for the etrailer Trailer Hitch Receiver on a 2020 Toyota Tacoma
- Video: How to Choose a Trailer Brake Controller
- Search Results: trailer hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: Trailer Wiring Diagrams
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Search Results: trailer wiring
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Search Results: trailer tires and wheels
- Article: How to Choose the Right Trailer Hitch Class
- Shop: Suspension Enhancement
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Q&A: Comparing the Curt Hitch C13416 and EcoHitch Hitch 306-X7396 for a 2019 Toyota RAV4
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Article: How to Measure for Trailer Hitch Drop
- Search Results: trailer hitch ball mount
- Q&A: Installation Time for Blue Ox BX1128 Flat Tow Base Plate Kit for 2016 Jeep Grand Cherokee
- Shop: Brake Controller
- Shop: Gooseneck Hitch
- Shop: Redarc Tow-Pro Liberty Brake Controller w/ Universal Wiring Harness - Dash Knob - Proportional
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: What Is An OEM Prep Package And How Do I Know If I Have It
on Custom Fit Vehicle Wiring
Robin H.
2/17/2026
Hey Brittney, did checking the ground connection on your Ford Edge wiring harness make any difference with the brake lights? Your update could make it easier for the next person troubleshooting a similar issue.