Troubleshooting Trailer Wiring That Does Not Work with One Vehicle But Does with Other
Published 08/01/2018
Question:
I bought this in Dec but havent had chance to put in until now. Install went smooth. Lights on tow vehicle work as they should. I put a tester on the 4 prong end of the output and it is hooked up properly according to the tester but when I attach it to the trailer the lights on the trailer dont work.... I know the trailer lights themselves work because I tow it with my other vehicle 2x a week... Any thoughts?
asked by: Alexander C
Expert Reply:
Typically if trailer wiring works with one vehicle but not another and you know the wiring is working the issue is that there's just weak enough of a ground to cause the lighting to not work on the weaker vehicle wiring. So what you'd need to do is improve the trailer wiring ground on the trailer and you'll see the wiring start working again.
I attached a help article on trailer wiring for you to check out too.
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
- Converter
- No Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- Hidden
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Search Results: cargo basket
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Shop: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Trailer Hitch
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Video: Checking Out the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector-118784
- Video: Set up: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector on a 2022 Kia Carnival
- Video: Installation: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector on a 2024 Kia Carnival
- Q&A: Troubleshooting No Turn Signals with T-Connector Wiring Installed on a 2023 Hyundai Santa Fe
- Q&A: Troubleshooting Trailer Lights Strobing When Brake Pedal Pressed
- Shop: Yakima Rack and Roll Trailer - 78"
- Q&A: Trailer Turn Signals Both Blink at the Same Time When Right or Left Turn Signal is Turned On
- Shop: Hook Probe Circuit Tester
- Q&A: All Trailer Lights Blink When One Turn Signal Is Activated
- Q&A: Wiring Recommendations for 2020 Hyundai Palisade Limited
- Shop: etrailer Anti-Rattle Hitch Collar for 2" Hitch Receivers
- Q&A: Trailer Hitch Confirmed to Fit a 2024 Kia Carnival
- Video: How to Install the Curt Trailer Hitch Receiver on a 2023 Kia Carnival
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Video: The Low-Down on the Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Search Results: trailer hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer wiring
- Article: Trailer Wiring Diagrams
- Video: Clean Up Your Trailer Wiring
- Article: How to Measure for Trailer Hitch Drop
- Search Results: trailer tires and wheels
on Custom Fit Vehicle Wiring
