Troubleshooting A 7-Way Trailer Wiring Harness That Isn't Sending Braking And Turning Signals
Question:
I just installed the T-One Vehicle Wiring Harness with 7-Way Trailer Connector on my 2007 Nissan Fontier SE 4x4. The trailer tail lights worked fine BUT no brake or turn signals will work. I did hook the trailer to my Chev Tahoe after trying it and everything worked fine. Any suggestions
asked by: Benjamin B
Expert Reply:
Since the T-One Vehicle Wiring Harness with 7-Way Trailer Connector # 118281 is a quick plug and play style connection I would first check the pins in each connector and ensure none are bent, missing, and that there isn't any debris blocking the connections. You can use some Dielectric Grease # 11755 to ensure a proper and waterproof connection.
Next you can test the pins at the 7-way using a tester like the # PTW2992 to see if the signal is being sent or is getting lost somewhere before the 7-way. I've attached a color coding guide below that will help you test each function.
Since you stated the trailer worked fine hooked up to your other vehicle then that leads me to believe the issue lies with the wiring harness, specifically the portion of the harness connecting the 7-way to your vehicle's wiring. If all connections are good and you're not receiving the signal at the 7-way then the harness itself is faulty and will need to be replaced.
Products Referenced in This Question
Dielectric Grease for Electrical Connectors, 2 oz.
- Accessories and Parts
- Trailer Wiring
- Wiring
- Dielectric Grease
- LubriMatic
more information >
Product Page this Question was Asked From
T-One Vehicle Wiring Harness with 7-Way Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 7 Round - Blade
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Shop: LCD Digital Circuit Tester
- Search Results: 7 pin trailer wiring harness
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector
- Shop: Replacement Custom Multi-Tow 7-Way and 4-Way Trailer Connectors
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Universal Mounting Panel for Redarc Tow-Pro Elite or Liberty Trailer Brake Controller Control Knob
- Shop: Mounting Panel for Redarc Tow-Pro Trailer Brake Controller Control Knob
- Shop: Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors
- Article: Nissan Tow Package Wiring Harness 118266/118267 - 7 Way Harness Installed and Electric Brakes Locked
- Q&A: Are Relays Required to Activate the Trailer Wiring Harness on a Nissan Frontier
- Q&A: Parts Needed to Install 4-Way and 7-Way on 2010 Nissan Pathfinder
- Q&A: Troubleshooting 2016 Nissan Frontier Trailer Wiring with No Turn Signals
- Q&A: How Can I Get Power to my 7-Way Connector on my 2006 Nissan Pathfinder without a Tow Package.
- Q&A: Adding a 7-Way Trailer Connector to a 2016 Honda Pilot
- Article: Trailer Wiring Diagrams
- Search Results: redarc
- Shop: Brake Controller
- Search Results: brake controller
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Trailer Hitch
- Video: Choosing the Right Trailer Wiring
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Video: Choosing the Right Brake Controller
- Search Results: trailer brake controller
- Search Results: 90160
- Article: How to Choose the Right Trailer Hitch Class
- Video: Redarc Tow-Pro Liberty Brake Controller Review RED24FR
- Shop: Suspension Enhancement