Turn Signals Don't Work on Trailer With C56381
Updated 09/09/2021 | Published 09/08/2021
Products Featured in This Question
Question:
We hooked up wiring harness as instructed and brake lights work but turns dont on trailer.
asked by: Sera V
Expert Reply:
There are a number of troubleshooting steps you can take if your trailer's turn signals don't work after you installed the Wiring Harness # C56381 on your Hyundai. The first thing to do is take a look at your owner's manual to locate any trailer fuses or relays and ensure they are all there and in working order.
If they are, in order to determine the specific problem you will need a Circuit Tester like # PTW2979 and test the connector on your vehicle after disconnecting it from your trailer. Check the wiring going into your harness from your tail lights to see if those wires are carrying the correct signals, if not then the issue is with the vehicle wiring.
If the signals going to your harness are okay, you'll need to test the signals coming out of the harness, and if they are okay then the issue is on the trailer side. The most important thing to do for this is check your trailer's ground wiring is good and attached to bare metal surfaces and free of any paint, dirt or corrosion.
I have added a link below to a help article on troubleshooting which I also recommend checking out.
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
- Powered 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
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Video: Cordless Circuit Tester: The Breakdown
- Q&A: 4-Way Vehicle Wiring Harness Compatible With 2022 Hyundai Ioniq PHEV
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Search Results: trailer wiring
- Search Results: flat tow wiring harness
- Video: How to Install the Curt T-Connector Vehicle Wiring Harness - 2020 Hyundai Ioniq
- Video: Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C56381 Review
- Q&A: How to Test a 4-Way Trailer Wiring Harness Plug
- Q&A: Recommended Parts to Use Thule License Plate Bracket on a 2019 Hyundai Ioniq Plug-In Hybrid
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Cordless Circuit Tester
- Search Results: trailer wiring kit
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class I - 1-1/4"
- Video: How to Install the Curt Trailer Hitch Receiver on a 2018 Hyundai Ioniq
- Shop: Trailer Hitch
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Search Results: trailer hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: Trailer Wiring Diagrams
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Shop: Suspension Enhancement
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Search Results: trailer tires and wheels
- Article: How to Choose the Right Trailer Hitch Class
on Custom Fit Vehicle Wiring
