Troubleshooting Function Issues With Tekonsha Trailer Wiring Harness # 118336
Updated 08/17/2017 | Published 08/16/2017 >
Products Featured in This Question
Question:
I purchased a hitch and the above mentioned wiring harness for my 2005 MDX. Everything installed ok but the wiring harness will not work on the driver side tail light or signal light. The MDX tail lights work fine. I have tried two different trailers and both have the same issue. Both trailers work just fine on my ford F150. Any suggestions on what might be the issue??
asked by: John
Expert Reply:
The Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118336 is a confirmed fit for your 2005 Acura MDX. I recommend using a circuit tester like # PTW2993 to troubleshoot. I recommend testing each function at the end of your 4-way connection. If they are working, then the issue is most likely with the ground wire on your trailers. If they are not working then you will want to test the individual functions on either side of the box. If the result is consistent, the issue is further upstream and you'll want to check function at the initial connection to your vehicle wiring. If it is not consistent, then you will want to replace the wiring harness.
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
- Vehicle End Connector
- Converter
- No Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- Visible
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class I - 1-1/4"
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Q&A: Trailer Turn Signals Both Blink at the Same Time When Right or Left Turn Signal is Turned On
- Video: Review of the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector-C27BR
- Video: Tekonsha T-One Vehicle Wiring Harness Installation - 2022 Jeep Grand Cherokee L
- Video: Curt T-Connector Vehicle Wiring Harness Installation - 2022 Jeep Grand Cherokee L
- Shop: Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Video: Setting up the Draw-Tite Max-Frame Trailer Hitch Receiver on a 2023 Toyota RAV4
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Q&A: Troubleshooting Driver and Passenger Turn Signal On Tekonsha T-One 118668 Not Working
- Shop: ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit
- Video: Testing and Troubleshooting a Modulite Vehicle Wiring Harness
- Search Results: timbren vehicle suspension
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Search Results: trailer hitch
- Video: Installing the Curt Trailer Hitch Receiver on a 2025 Toyota RAV4
- Search Results: trailer wiring
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Article: Trailer Wiring Diagrams
- Q&A: Comparing the Curt Hitch C13416 and EcoHitch Hitch 306-X7396 for a 2019 Toyota RAV4
- Search Results: trailer hitch ball mount
- Shop: Brake Controller
- Article: How to Choose the Right Trailer Hitch Class
- Q&A: What Is An OEM Prep Package And How Do I Know If I Have It


