How to Determine the Function of Trailer Connector Wires
Question:
I HOOKED tHE BATTERIES TWO MONTHS AGO they were dead i put in two new ones today. no problems putting the black and white wires in the right spots but there is another orange wire coming from the trailer not marked where does it go which post? thanks
asked by: Paul C
Expert Reply:
Since color coding on trailer wiring is different for almost every manufacturer you have two options for determining what wire goes where for wiring in a trailer connector.
You can either trace the wires back and see where they terminate to determine their function, or you can use a 12 volt battery like a vehicle battery and a jumper cable to apply 12 volts to each wire and see what trailer wiring function is activated and then wire it to the 7-way accordingly.
I attached a picture of how 7-ways are typically wired.
I also attached an FAQ article on trailer wiring for you to check out also.
Product Page this Question was Asked From
Adapter 4-Pole to 7-Pole and 4-Pole
- Trailer Wiring
- Wiring Adapters
- Multi-Function Adapter
- 4 Flat
- Plug and Lead
- 4 Flat
- 7 Round - Blade
- Hopkins
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Curt Trailer Connector Adapter - 4-Way to 7-Way RV and 4-Way Flat
- Search Results: 7 pin trailer wiring harness
- Video: Roadmaster Variable Voltage LED Tail Lights Wiring Kit Installation - 2022 Jeep Wrangler Unlimited
- Video: Brake Buddy Supplemental Braking Systems Dash Mount Connector Install - 2019 Chevrolet Equinox
- Shop: Trailer Wiring
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Shop: Replacement Dash Mount Connector for Brake Buddy Systems - Classic II and 3 - Select II and 3
- Shop: Roadmaster Bent Electrical Socket Bracket
- Shop: Base Plate for Tow Bar
- Video: Curt Trailer Connector Adapter Installation - 2021 Ford F-150
- Video: Roadmaster Direct-Connect Base Plate Kit Installation - 2022 Jeep Wrangler Unlimited
- Shop: Roadmaster Direct-Connect Base Plate Kit - Removable Arms
- Shop: BrakeBuddy Towed Vehicle Battery Charge Line Kit
- Search Results: 7 pin and 4 wire flat trailor harness
- Search Results: inline fuse
- Q&A: Parts Needed to Convert a Jeep's 4-Way to a 7-Way
- Q&A: How to Wire Reverse Lights on a Trailer with a 4-Way Trailer Connector
- Shop: RoadMaster 6-Wire Trailer Connector - Vehicle End
- Shop: Adapter 4-Pole to 7-Pole and 4-Pole
- Shop: Brake Controller
- Search Results: trailer brake controller
- Video: Roadmaster Bent Electrical Socket Bracket Review
- Q&A: Do the Blue, Yellow, and Black Wires Need To Be Run On the Curt Trailer Connector Adapter C57672
- Video: Curt Trailer Connector Adapter Installation - 2016 Ram ProMaster 2500
- Video: Curt Trailer Connector Adapter Installation - 2020 Volvo XC60
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Shop: Trailer Hitch
- Search Results: base plates
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: Trailer Wiring Diagrams
on Trailer Wiring
