Troubleshooting Trailer Lights Not Working with T-One Wiring Installed on 2020 Infiniti QX60
Question:
Good afternoon, I installed the tekonsha 4 pin trailer harness some time ago on my 2020 infiniti QX60 and up until this week, everything worked fine when I connected a trailer to it. Just yesterday I could not get the brake lights or signals to work but the running lights came on OK. I checked the relays and fuses as mentioned in a previous post link, but they checked out OK as well. Any other suggestions to look at? Also I replaced the full kit with a replacement kit I bought and I get the same results. Thanks again for the time and support.
asked by: SE
Expert Reply:
Thank you for all of the information!
The T-One Vehicle Wiring Harnesses, like part # 118670 for your 2020 Infiniti QX60, typically do a great job and don't malfunction often. Since you've replaced this harness already and you've checked and found your fuses to be good there is really only one other thing on the vehicle end that could be the problem and that's the OEM wiring on your vehicle (it's possible both T-One harnesses were bad but REALLY unlikely). What you'll do to test this is use a circuit tester like part # PTW2979 to see if all of the functions are there on your OEM connector that the T-One plugs into.
Another possibility is your trailer wiring is the problem. If the OEM connector on your QX60 tests alright then you can verify power is getting all the way to the 4-Way flat connector on the T-One by testing those pins as well.
If everything looks good on your vehicle then we need to check the wiring, connections, and grounds for all of the lights involved on your trailer, but if the problem is also affecting the lights on your vehicle then you'll need to take your vehicle to a shop and have it looked at.
Attached are some videos and a helpful article to assist.
(click to enlarge)
Products Referenced in This Question
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
- No Converter
- Custom Fit
- 4 Flat
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Shop: 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Shop: Trailer Hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Video: Curt T-Connector Vehicle Wiring Harness Installation - 2014 Nissan Pathfinder
- Video: Yakima HangOver Tilting 4 Bike Rack Review
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector
- Shop: Yakima HangOver Bike Rack for 6 Mountain Bikes - 2" Hitches - Tilting
- Shop: Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class IV - 2"
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Video: Choosing the Right Trailer Wiring
- Search Results: trailer hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: hitch
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Article: How to Choose the Right Trailer Hitch Class
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Shop: Brake Controller
- Q&A: Recommended Hitch for a 2024 Toyota Grand Highlander
- Search Results: trailer hitch wiring
- Video: Choosing the Right Brake Controller
- Article: Trailer Wiring Diagrams
- Q&A: What Hitch Do You Recommend for a 2024 Toyota RAV4?
- Shop: Roof Rack
- Search Results: wiring harness
- Article: My Trailer Hitch Doesn't Fit
- Video: Curt 4-Pole Flat Trailer Connector Mounting Bracket Review
- Article: How to Measure for Trailer Hitch Drop
on Custom Fit Vehicle Wiring
