Instructions for Wiring a New 4-Way to a Trailer that Only has Green, Brown, and Yellow Wires
Published 12/22/2015 >
Question:
My trailer only has 3 wires. Green , brown and yellow. My harness has 4. Green, brown, yello w and white. I matched Color for color but dont know where the white wire Connects to. Need help. Thanks
asked by: Roel
Expert Reply:
The white wire is the ground circuit. What you will need to is run the white wire of your new harness to the frame of the trailer. You will want to pick a clean metal surface that is directly attached to the frame. Your taillight assemblies ground through the mounting hardware. That is why the ground attaches to the frame.
I attached a help article on trailer wiring for you to check out as well.
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
- Article: Trailer Wiring Diagrams
- Q&A: Recommended Bolt On 7,000 lbs Capacity Square Jack
- Q&A: Can A No-Drill Bracket Be Installed On A Hitch With A Square Crosstube?
- Q&A: Will The Optronics Flexible LED Light Strip UCL90CB Stick Under A Trailer/Camper?
- Q&A: Will TowSmart T-Connector Wiring Harness Fit 2016 Chevy Colorado
- Article: Trailer Lights Not Working After Winter? Test Truck or Trailer
- Article: Trailer Lighting Requirements
- Q&A: How Far from the Mounting Bracket is the Bottom of the etrailer Manual Sidewind Trailer Jack?
- Article: How to Bleed Your Trailer Surge Brakes
- Q&A: Testing The Dexter Electric Over Hydraulic Brake Actuator
- Q&A: Roadmaster Parts For Flat Towing 2023 Ford Edge ST
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: How to Tell the Weight Rating of a Trailer Axle
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)


