Replacement 4-Way Trailer Connector with 5 Wires
Updated 09/02/2025 | Published 06/16/2025
Products Featured in This Question
Question:
Hi. I am needing to replace the plug for my trailer wiring but am having a hard time finding what I need. The connection has 4 pins with 5 wires. The wires go White, Brown looks yellowish now but I think its supposed to be brown, black and white, yellow, green. I can send pictures if it would help... Thanks!
asked by: Matt B
Expert Reply:
Hey Matt, thanks for reaching out!
The correct replacement for your trailer wiring/connector is the Wesbar Wishbone Wiring Harness with 4-Pole Flat Trailer Connector # 002402. For wiring that uses 5 wires but only has 4 pins, 2 of those wires go to the same pin and it's normally for the running lights.
If you confirm what functions those wires have, you can use Butt Connectors # DW05744-5 to connect all of the wiring together.
Let me know what you end up finding out!
Product Page this Question was Asked From
Wesbar Wishbone Wiring Harness with 4-Pole Flat Trailer Connector - Trailer End - 18" Long
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 4 Flat
- Plug and Lead
- Wesbar
more information >
Continue Researching
- Shop: Deka Heat Shrink Butt Connector - 16-14 Gauge - Nylon Insulation - Blue - Qty 5
- Article: Trailer Wiring Diagrams
- Q&A: Why Does 4-Pin Trailer Wiring Have 5 Wires
- Q&A: Wiring New 4-Way Connector on Trailer with 5 Wires
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Q&A: Can I Use the etrailer High-Low Fixed Adapter for Tow Bars e85ZV on a Boat Trailer?
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: Trailer Plug is a 4-Way Flat But there are 6 Wires
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: Availaiblity of White Half Moon Trailer Vent
- Q&A: Why Would a Trailer Hitch Come Detached From the Ball During Travel?
- Q&A: Torque Specs for U-Bolts on 3,500 Pound Axles
- Article: Trailer Lighting Requirements
- Article: Wiring Trailer Lights with a 5-Way Plug (It's Easier Than You Think)
- Article: Best Bike Racks for Electric Bikes
Jon G.
9/2/2025
Hey Matt, Did you have a chance to confirm the functions of the wires for your trailer wiring? I'm here to help if you need any further assistance with connecting everything together.