Troubleshooting Turn Signal Issues with T-One Wiring Installed on a 2021 Ford Bronco
Question:
I installed the 118849 kit on my 2021 Ford Bronco. I have found that the left turn signal doesn’t not work on the trailer and the right turn signal puts the 4 ways on. I tested the trailer on 2 other vehicles and all lights work properly.
asked by: Andrew
Expert Reply:
Since the trailer is working with other vehicles it does sound like the T-One # TK99VR wiring is the issue on your 2021 Ford Bronco.
If you use a circuit tester on the 4-Way you can double check and make sure that the 4-Way is working correctly. I would try the connector as well as the wiring before and after the module to ensure that your Bronco is sending the correct signals through.
If your Bronco is sending everything correctly (like it should be) then I would think that the wiring is the issue and I would take advantage of the 1-year limited warranty.
![Jon G](https://images.etrailer.com/static/images/catg/people/1086_tn.jpg)
Product Page this Question was Asked From
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Custom Fit
- 4 Flat
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: No Splice Trailer Wiring Harness that Fits 2021 Ford Bronco
- Q&A: Why Does Trailer Wiring for 2022 Ford Bronco Require Running Wire up to Vehicle Battery
- Q&A: Parts Needed to Install a 7-Way Trailer Connector on a 2022 Ford Bronco With LED Taillights
- Q&A: Recommended 7 Pin Connector For A 2021 Ford Bronco
- Q&A: Fitment of Bumper Cover with Draw-Tite Hitch Receiver on a 2023 Jeep Grand Cherokee
- Q&A: Parts Needed To add a 7-Way With Trailer Charge Line On a 2022 Ford Bronco
- Q&A: Recommended Flat Towing Parts for a 2023 Ford Bronco w/ a Plastic Front Bumper
- Article: Routing the Power Wire for a Trailer Wiring Harness
- Article: How to Measure for Trailer Hitch Drop
- Article: Ball Mount Basics: Weight Capacity, Class, and Size
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Article: What is Overlanding? How to Start your Overlanding Journey
- Article: Trailer Wiring Diagrams