Recommended In Bed Trailer Connector Wiring Harnesses for Trucks w/a Factory 7-Way Connector
Updated 06/04/2026 | Published 05/29/2026 >
Products Featured in This Question
Question:
I have a 2023 ram 1500 trx and Im Looking for Connector Vehicle Wiring Harness for Factory Tow Package ? which is my fit truck ?And what is different this two item ? Part Number: C55384 Part Number: C56584
asked by: Jae w
Expert Reply:
Hey Jae, thanks for the information. The Curt T-Connector Vehicle Wiring Harness item # C55384 is going to connect inline to your Ram's factory wiring. It'll provide an additional 4-way flat connector that can be used to power accessories like a light bar. It's typically ran up and into your bed.
The Curt T-Connector Vehicle Wiring Harness item # C56584 has an identical installation method but provides a 5-way flat connector. These are commonly found on boat trailers and used to activate surge brake lockouts.
We also have the Curt 5th Wheel/Gooseneck Custom Wiring Harness w/ 7-Pole Connector item # C56000. This also installs inline with your factory tow wiring. It provides an additional 7-way that will be mounted inside your Ram's bed. It's mainly used for towing gooseneck and 5th wheel trailers but is also really handy if you're hauling an in bed camper that requires a 7-way connection.
Please note that all of these wiring harnesses will only work with factory towing packages. If your truck doesn't have a factory 7-way these will not fit. They connect to what's called a USCAR connector that is not available with aftermarket setups. I attached a picture below of the connector and linked some installation videos so you can see how to get these parts installed.
What size connector are you needing and what are you going to be using it for?
You can add this information, along with any other questions you have, where it says Add Comment.
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- No Converter
- Factory Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Trailer Wiring Diagrams
- Q&A: Does the Curt C44FR Fit a 2026 Chevy Equinox?
- Q&A: 4-Flat Wiring Harness For 2026 Hyundai Tucson Hybrid
- Article: How to Install a Brake Controller on Chevrolet / GMC 1999-2006 Pickups
- Article: How to Choose the Right Trailer Hitch Class
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Q&A: Wiring Harness for 2021 Lexus GX460
- Q&A: Parts Needed to Add Trailer Wiring to 2023 Toyota Tundra SR
- Q&A: Wiring Harness For A 2022 Ford Explorer XLT Without Factory Towing Package
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: How to Add an Additional 4-Way Connector to a Vehicle w/a Factory 7-Way
- Q&A: Trailer Hitch and Wiring for 2025 Chevrolet Equinox
- Article: How to Measure for Trailer Hitch Drop





