Troubleshooting Trailer Left Turn Signal and Brake Lights On 2009 Honda CR-V
Question:
Hi, We installed this harness on our 2009 Honda CRV to use on a new boat trailer. Everything worked fine for a couple trips, but now the left turn signal and brake lights do not work. Running lights work on both sides. Any ideas? Thanks!
asked by: Brandon F
Expert Reply:
First thing you should do at this point is test the 4-way of the wiring harness with a circuit tester part # PTW2993 for voltage on all of the right pins when the taillight signals are being applied. Just like in the video I attached.
If the voltage checks out there but the trailer lights still don't function right then the problem is on the trailer wiring. That would mean that problem is either due to a ground issue or a short issue.
Make sure that the trailer side and vehicle side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces. The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding tongue, any of these things can interrupt the ground. Running jumper wires from the light grounds to the main trailer connector ground can help.
If the problem is on the vehicle side then I would first recommend you double check how the harness is installed on your vehicle, make sure all of the connections are good and tight. You should check all towing related fuses and relays as well.
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
- Converter
- Custom Fit
- 4 Flat
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Shop: Trailer Hitch
- Article: How to Choose the Right Trailer Hitch Class
- Q&A: Replacement Leaf Springs for a Vintage Camper
- Q&A: Start Capacitor Solution for Dometic 15k BTU AC Unit
- Article: Flat Towing Package for 2014-2015 Chevrolet Equinox
- Q&A: Availability of Side Crank Trailer Jack with Removable Handle
- Q&A: Is There Differnce Between Trailer Grease Seals 10-36 and GS-2250DL
- Q&A: Replacement Idler Hub Assemblies And Wheels For Boat Trailer
- Q&A: Can Bearing Buddy Bearing Protectors be Used on etrailer.com Hub Assembly # AKIHUB-440-2-1K
- Q&A: Trailer Wiring Harness that Fits 2023 Hyundai Palisade
- Article: Determining Trailer Tongue Weight
- Article: What Exactly is Tongue Weight?
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: How to Measure for Trailer Hitch Drop
- Article: What Do I Need To Tow A Trailer?