What are the Functions of Trailer Light Green, Yellow, and Brown Wires
Question:
Installing turn lights to a 4 flat trailer. Old original lights have 3 leads, Red, black and green. New Right side wires are Green and brown. New left side wires are yellow and brown. Which colors should be spliced together?
asked by: William I
Expert Reply:
Normally, the green wire on the right side carries right turn signal and brake light functions and the brown wire carries running light functions. On the left side, the yellow wire carries left turn and brake lights and the brown wire again carries the running lights. With only 2 wires, these lights must ground through the mounting studs.
Make sure to wire in the new lights by function to the existing trailer wiring and not by color.
Product Page this Question was Asked From
Hopkins Wiring Harness with 5-Pole Flat Trailer Connector - Vehicle End - 5' Long
- Trailer Wiring
- Trailer Connectors
- Vehicle End Connector
- 0 - 5 Feet Long
- Plug and Lead
- 5 Flat
- Hopkins
more information >
Continue Researching
- Shop: Trailer Wiring
- Article: Trailer Wiring Diagrams
- Shop: Vehicle Tow Bar Wiring
- Shop: Trailer Hitch
- Shop: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Search Results: base plate for tow bar
- Video: Installation: Blue Ox Base Plate Kit on a 2018 Ford F-150
- Shop: Base Plate for Tow Bar
- Q&A: Where Does Trailer Wiring that is Brown/Yellow and Brown/Green Attach on Trailer with Solid Brown
- Shop: Roadmaster 4-Diode Universal Wiring Kit for Towed Vehicles - 7-Way to 6-Way Coiled Adapter Cord
- Shop: Blue Ox Base Plate Kit - Removable Arms
- Shop: Blue Ox Base Plate Kit - Removable Arms
- Shop: Blue Ox Off-Road Bumper Adapters for Blue Ox Motorhome Mounted Tow Bars - 7/8" D-Rings
- Shop: Blue Ox Base Plate Kit - Removable Arms
- Q&A: Standard Color Code for Wiring Simple 4 Wire Trailer Lighting
- Search Results: brake line kit
- Search Results: dexter brake line kits
- Video: Review of Hydrastar Brake Actuator - Electric-Hydraulic Brake Actuator - HS481-8067
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: What is the Function of the Yellow/Brown Wire on a Trailer
- Q&A: Why Does Trailer's Wiring have Two Brown Wires
- Shop: Brake Controller
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Shop: Tire Chains
- Search Results: 3041~p
- Video: All You Need to Know About the Titan Chain Cable Tire Chain
- Q&A: Trailer Running Lights Do Not Work but Brake Lights and Turn Signals Do Work
- Video: Curt Soft Trac Trailer Breakaway Kits Replacement 12-Volt Battery Review
- Article: Breakaway Kit Installation for Single and Dual Brake Axle Trailers
on Trailer Wiring
Line C.
5/24/2020
Hi! I only have 3 wires on the trailer (brown, white, green) and 4 on my Chevy van.. extra red.. How do I plug it in ? Thanks!