How To Determine 4-Way Wiring On a Trailer For Connecting a New 4-Way Flat Connector
Question:
Im trying to reconnect trailer lights to a 4-way flat plug. The trailer has red, green, yellow, and brown wires and the plug the typical white, green, yellow, brown. I know red goes to green, but I forget the other connections. I assumed green to white and then yellow- yellow, brown-brown, but the left trailer light is still not working, even after replacing the bulb.
asked by: Lisa
Expert Reply:
With your trailer having the different colored wires you are going to need to identify each wire function to know exactly what wires to connect your new 4-Way # W787264. This 4-way uses white for ground, brown for running/clearance lights, yellow for left turn/brake and green for the right turn/brake.
You will first want to follow the wiring on your trailer as this should help you determine the ground. Knowing the ground wire will make it easier to use a battery for testing the lights for function on the trailer. You can connect the ground wire to the negative battery terminal and then each individual wire to the positive and record what lights come on. Once you know each lights function you will be able to connect it to your new harness.
(click to enlarge)
Product Page this Question was Asked From
Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 4' Long
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 0 - 5 Feet Long
- Plug and Lead
- 4 Flat
- Wesbar
more information >
Continue Researching
- Shop: Trailer Wiring
- Shop: Wesbar 4-Pole Flat Connector w/ Jacketed Cable - Trailer End - 4' Long
- Shop: Vehicle Tow Bar Wiring
- Q&A: Recommendation to Give 7-Way an Additional Active 4-Way Trailer Connector
- Q&A: 4-Way Trailer Wiring Recommendation that Uses all 16 Gauge Wires
- Q&A: Recommended 6-Way Trailer Socket Compatible with Factory US Car Connector Wiring like 2013 Durango
- Q&A: Can Trailer Lighting Be Grounded to Main Ground Wire
- Q&A: Recommended American Trailer Connection Conversion from European Style on 2008 Audi Q7
- Q&A: Recommended 6-Way Trailer Wiring Connection Compatible With 2006 Ford E-350 Econo Van
- Q&A: Troubleshooting Trailer Light Function With 2003 Chevy 3500 Flat Bed
- Video: Hopkins Wiring - Wiring Adapters - 37175 Review
- Video: Review of Hopkins Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 40965
- Search Results: 30104
- Search Results: 6 pole trailer connector
- Shop: Westin Fey Diamondstep Rear Bumper - Black Powder Coated Steel
- Shop: Adapter 7-Pole to 6-Pole and 4-Pole with Cover - Universal
- Shop: Adapter 4 Pole to 6 Pole and 4 Pole Trailer Wiring Adapter
- Shop: Universal Installation Kit for Trailer Brake Controller - 6-Way and 4-Way Flat - 10 Gauge Wires
- Shop: 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 6-Way Round and 4-Flat Connectors
- Video: Hopkins Tow Bar Wiring HM48235 Review
- Search Results: 47465
- Search Results: rm~732
- Video: Roadmaster Diode 7 to 6 Wire Coil Kit Installation - 2014 Honda CR-V
- Video: Choosing the Right Trailer Wiring
- Shop: Trailer Hitch
- Search Results: 90160
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer hitch
- Article: Trailer Wiring Diagrams
on Trailer Wiring
