How to Connect 4-Way Trailer Wiring with a Wishbone Harness
Question:
On trailer theirs white green with brown line brown with green line yellow with brown line brown Im tried hook up to solid white brown green yellow plug where do the wires go
asked by: Justyn S
Expert Reply:
You have a wishbone harness like # A20WB. This type of wiring harness splits the running light circuit at the trailer connector, so you don't have to run a jumper wire from taillight to taillight. The yellow/brown wire is the running light circuit for the driver side. The green/brown wire is the running light circuit for the passenger side.
It's good idea to test your vehicle wiring for each function using a circuit tester like part # PTW2993. You'll connect the wiring based on function and not necessarily color. Vehicle wiring colors do not always match up directly with trailer wiring.
Here a list of standard wiring and functions.
White - Ground
Brown -Tail/Running Lights
Green - Right Turn/Brake
Yellow - Left Turn/Brake
I have linked a FAQ wiring article for additional info.
Products Referenced in This Question
20 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 30" Ground
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 11 - 20 Feet Long
- Plug and Lead
- 4 Flat
- Optronics
more information >
Product Page this Question was Asked From
Continue Researching
- Shop: Wesbar Wishbone Wiring Harness with 4-Pole Flat Trailer Connector - Trailer End - 18" Long
- Shop: Suspension Enhancement
- Q&A: Why Does 4-Pin Trailer Wiring Have 5 Wires
- Shop: Trailer Wiring
- Shop: 35 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 42" Ground
- Search Results: ssr~610~47
- Search Results: ssr~610~40
- Q&A: How To Convert A Wishbone Trailer Wiring Harness To A Regular 4-Flat Trailer Wiring Harness
- Q&A: 4-Way Trailer Connector that has 5 Wires
- Article: Wiring Trailer Lights with a 5-Way Plug (It's Easier Than You Think)
- Article: Trailer Wiring Diagrams
- Search Results: wiring harness trailer
- Q&A: Trailer Connector has 4 Pins But 5 Wires
- Shop: 20 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 30" Ground
- Search Results: wishbone 4 way trailer wiring harness
- Shop: 4-Way Wishbone Trailer Wiring Harness with 42" Ground Wire - 40' Long
- Video: Trailer Wiring Harness Installation A35W42B
- Video: Optronics Wiring - Trailer Connectors - A35W42B Review
- Shop: SumoSprings Solo Custom Helper Springs - Rear Axle
- Shop: SumoSprings Solo Custom Helper Springs - Rear Axle
- Shop: SumoSprings Solo Custom Helper Springs - Rear Axle
- Video: Optronics 4-Way Wishbone Trailer Wiring Harness Installation
- Q&A: SumoSpring Suspension Kit That Fits 2015 Toyota Tacoma
- Q&A: Working Running Lights, But No Turn Signals or Brake Lights On Trailer
- Q&A: What Does Second Brown Wire of a 4-Way Trailer Connector with 5 Wires Connect To
- Article: Troubleshooting 4 and 5-Way Wiring Installations
- Video: Wesbar Wiring - Trailer Connectors - 002402 Review
- Video: Curt Wiring - Wiring Adapters - C57187 Review
- Video: Review of Optronics Trailer Wiring - Trailer Connectors - A20WB
- Shop: Gooseneck Hitch