What Type of Trailer Wiring Harness to Upgrade on Boat Trailer for Adding Reverse Lights
Updated 10/30/2025 | Published 10/04/2025
Products Featured in This Question
Question:
Hi, I currently have a 5 pin flat wire yarness to a 5pin circle connector on my boat trailer. I want to add reverse lights to the trailer. confirm I need to jump to a 6pin system? if so what product do you have that is a Y split to make it easy to run down both sides of the trailer? I need 30 of wire.
asked by: Alex B
Expert Reply:
Hey Alex, yes you would need to add additional circuits to your 5-pin setup to allow it to carry the reverse light circuit as well. The most common style of connector for this would be to go with a 7-way so that would be what I would recommend. The 6-way is basically only really used with horse trailers so it's not very common at all.
We have a kit for this with the etrailer junction box part # e99011. You'd run your current 4-way wiring to the matching terminals and then run the extra circuit you want to add to the reverse light circuit. Since it's a post that you attach to on the circuits you can easily run two wires for the reverse light circuit for both sides of the trailer.
Product Page this Question was Asked From
T-One Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- Powered Converter
- Factory Tow Package
- 7 Blade
- Plug and Lead
- Plug-In
- Visible
- Tekonsha
more information >
Featured Help Information
Instructions
Continue Researching
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: 7-Way Trailer Wiring For 2020 Honda Pilot
- Article: Trailer Wiring Diagrams
- Q&A: Is My 2016 Honda Pilot Trailer Wiring 7-way or Only 4-way?
- Q&A: Why are the Hitches for a 2017 Honda Pilot Rated so High?
- Q&A: How to Install a Brake Controller on a 2017 Honda Pilot
- Q&A: How to Install a Brake Controller on a 2018 Honda Pilot
- Q&A: Trailer Wiring and Trailer Hitch Recommendation for 2017 Honda Pilot
- Article: How to Choose the Right Trailer Hitch Class
- Article: 5 Things to Know About Weight Distribution Hitches
- Article: The 5 Best Trailer Drop Hitches You Can Buy
- Article: Brake Controller Installation: Starting from Scratch
Jameson C.
10/30/2025
Hey Alex, how did things go with adding the reverse lights using the 7-way upgrade kit and junction box? Your update could make it easier for the next person looking to expand their trailer wiring setup.