Troubleshooting Stop/Turn Signals Not Functioning on Trailer
Updated 06/11/2014 | Published 06/10/2014
Question:
Rewired trailer w/4pin connector. Running lights work but brake and turn signal not working. Color coded same to same. Had to dual wire brown. Any suggestions. Did check 4 pin on truck and ok with tester.
asked by: Rich R
Expert Reply:
Since you tested the 4-way of your vehicle we know the problem is in your trailer wiring.
The first place to check is the grounds of the taillight assemblies. Trailer lights usually ground through the mounting studs and they, too, will need to be attached to a clean and corrosion free bare metal surface. On the trailer side connector, make sure that the main ground is connected to a clean and corrosion free bare metal surface. Also if there are is any dirt in the trailer connector you should clean it out.
Other than that you will just need to check to make sure the wires that run from the connector to the light assemblies aren't damaged.
I also attached an FAQ on troubleshooting 4-way installs for you to check out.
Product Page this Question was Asked From
16 Gauge, 4 Conductor Bonded Parallel Wire - Per Foot
- Wiring
- Wire
- Bonded Wire
- 4 Wire
- 16 Gauge
- Deka
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Ladder Rack
- Shop: etrailer Over-The-Cab Truck Ladder Rack - Steel - 1,000 lbs
- Video: Setting Up Your etrailer Over-The-Cab Truck Ladder Rack - 2024 Chevrolet Silverado 2500
- Shop: Buyers Products Over-The-Cab Truck Bed Ladder Rack - Black Powder Coated Aluminum - 800 lbs
- Shop: Buyers Products Over-The-Cab Truck Bed Ladder Rack w/ Rear Window Guard - Black Steel - 1,000 lbs
- Shop: Buyers Products Over-The-Cab Truck Bed Ladder Rack - Aluminum - 800 lbs
- Video: Set up: Buyers Products Over-The-Cab Truck Bed Ladder Rack on a 2020 Ford F-250 Super Duty
- Video: In-Depth Review of the Buyers Products Over-The-Cab Truck Bed Ladder Rack
- Shop: Tonneau Cover
- Shop: Thule TracRac TracONE Ladder Rack w/ Cantilever - Fixed Mount - 800 lbs - Silver
- Q&A: Does Buyers Products Over the Cab Ladder Rack Come With All Hardware to Mount to 2018 Toyota Tundra
- Video: How To Assemble the etrailer Over-The-Cab Truck Ladder Rack
- Shop: Thule TracRac TracONE Truck Bed Ladder Rack - Fixed Mount - 800 lbs - Matte Black
- Search Results: track my order
- Q&A: Can Over-The-Cab Truck Bed Ladder Rack be Safely Used on F-150 with 5-1/2 Foot Bed
- Video: Yakima OverHaul HD Adjustable Truck Bed Ladder Rack with Tonneau Cover Adapters Review
- Video: Comprehensive Review: Eye Bolts for Yakima HD Bar, JetStream, FlushBar, and RailBar Crossbars
- Search Results: tonneau cover
- Shop: Roof Rack
- Shop: Yakima OverHaul HD Adjustable Truck Bed Ladder Rack w/ Tonneau Cover Adapters - 68" Crossbars
- Article: Trailer Wiring Diagrams
- Q&A: What Wire Colors do I Need to Attach for Installing Roadmaster Smart Diodes in 2024 Sierra 1500?
- Q&A: Roadmaster Parts For Flat Towing 2023 Ford Edge ST
- Article: Trailer Lighting Requirements
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Q&A: How To Power A Third Brake Light With Diode Wiring While Flat Towing
- Q&A: Recommended Flat Towing Parts for 2024 Ford Edge ST
- Q&A: Does The 2023 Ford Edge Require Smart Diodes?
- Article: Wiring Trailer Lights with a 5-Way Plug (It's Easier Than You Think)
on Wiring
