Troubleshooting A Turn Signal That Is Not Working On My Trailer
Question:
I have a 2018 Toyota Rav 4 and had a tow hitch and wiring I have break and running lights but no turn signal on each side
asked by: David E
Expert Reply:
This is something that can be remedied, but it will take some troubleshooting. This will be easier if your wiring harness is something like the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector, part # 118578. This is a plug and play system, so you will not have to check any spliced wires during the troubleshooting. If your setup is something like the 4-Pole Trailer End Connector, part # 18004, you attached to your question, you may have to do some wire splicing.
I recommend having a couple of items on hand when you start to troubleshoot your wiring. You can test specific 4-way wiring with the Curt LED 4-Way Flat Connector (Vehicle End) Tester, part # I26, and test to see if wires are hot with the Hook Probe Circuit Tester, part # PTW2993.
You are going to be testing for the following issues:
Your harness wires are not connected securely,
If you have a plug and play harness, the connectors are not seated properly,
You have a blown fuse or relay,
If you have a hard wired system, your brakes and turn signals have separate wires, and
Your ground is insufficient or you have a short to your ground.
I have included product description links, some helpful video links, and a weblink to trouble shooting your trailer wiring below.
Products Referenced in This Question
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Powered Converter
- Custom Fit
- 4 Flat
- Tekonsha
more information >
Curt LED 4-Way Flat Connector (Vehicle End) Tester
- Electrical Tools
- Testers
- Tow Function Tester
- Black
- CURT
more information >
Product Page this Question was Asked From
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 0 - 5 Feet Long
- Plug and Lead
- 4 Flat
- Draw-Tite
more information >
Featured Help Information
Instructions
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