How To Wire 4-Pole Harness with 5 Wires
Updated 10/18/2021 | Published 10/17/2021 >
Question:
trailer harnes has, white, green, yellow and a brown/ yellow wire and brown/ green wire are which are actually 2 wires each stuck together a green-brown and a yellow brown but 4 wires...do you only connect the brown sides to brown on the 4 way plug or all 5 wires to brown on 4 way plug
asked by: Mike E
Expert Reply:
I can't comment on specific wire colors but it sounds like you're referring to a wishbone trailer wiring harness like part # A25W2GWB which has five wires and four pins on the connector. There will be two running light wires (one for each side), a left stop/turn wire, right stop/turn wire, and ground wire. The running light wires are usually brown/yellow and brown/green whereas the left stop/turn is yellow, the right stop/turn is green, and the ground wire is white.
If your colors don't match the above you'll need to apply power to each wire at the connector and see which light it activates.
Product Page this Question was Asked From
25 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 25' Ground
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 4 Flat
- Plug and Lead
- Optronics
more information >
Continue Researching
- Shop: Trailer Wiring
- Shop: 25 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 25' Ground
- Search Results: a35w42b
- Search Results: dw05744~10
- Search Results: ptw2993
- Q&A: What Gauge Wiring Is Used On the 25 Ft 4-Way Trailer Wiring Harness # A25W2GWB?
- Q&A: Recommended 4-Way Flat Wiring Harness For an Aluminum Trailer
- Q&A: Will Optronics 25 Ft 4-Way Trailer Wiring Harness Work For Rewiring Utility Trailer
- Q&A: Should Ground Wire of Trailer Wiring Run to Frame of Trailer or Back to Light Assemblies
- Q&A: Availability of 16 Gauge Wire for Trailer Lights
- Q&A: Connecting Ground Wires From Optronics 25' Trailer Wiring Harness With Tail Lights Ground Strap
- Q&A: Wishbone Wiring Length Recommendation for a 16-1/2' Boat Trailer
- Search Results: led rear lights
- Shop: Curt Tail Light Converter with 4-Way Flat Trailer Connector
- Article: Trailer Wiring Diagrams
- Video: In-Depth Review of the 25 Ft 4-Way Trailer Wiring Harness
- Shop: LED Trailer Clearance or Side Marker Light with Reflex Reflector - 2 Diodes - Red Lens
- Shop: LED Identification Light Bar for Trailers over 80" Wide - Submersible - 9 Diodes - Red Lens
- Shop: Hot-Line LED Third Brake Trailer Light Bar w/ Reflector - Stop, Turn, Tail - Submersible - Red Lens
- Shop: Plug - Single Wire with 12" Lead for A91 and AL91 Series Trailer Clearance, Side Marker Lights
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Shop: Trailer Hitch
- Search Results: trailer hitch
- Video: How to Choose a Trailer Brake Controller
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer wiring
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Shop: Suspension Enhancement
- Video: The Low-Down on the Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Search Results: trailer tires and wheels

