Recommended 4 Flat Trailer Harness for a 2019 Jeep Wrangler
Updated 10/27/2025 | Published 03/21/2025
Products Featured in This Question
Question:
I have installed this on my Jeep JL. It has a plug for a trailer tow harness and a decal that gives the part number 58920. I can’t find it on your web site, do you have another part number.
asked by: John K
(click to enlarge)
Expert Reply:
Hey John, we don't have that wiring harness but it does look like all it is, is a 4 flat harness so you can use the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 56407.
This harness will plug into your exisiting harness and provide a 4 flat to the rear of your Jeep, doing essentially the same thing as 58920.
If there is anything else I can do for you, please feel free to drop a comment and let me know!
Product Page this Question was Asked From
Curt Custom Tail Light Wiring Kit for Towed Vehicles
- Flat Tow Wiring Harness
- Plugs into Vehicle Wiring
- Wiring Harness
- Custom Fit
- 4 Flat
- CURT
more information >
Featured Help Information
Instructions
Continue Researching
- Article: The Definitive, Step-by-Step Flat Towing Setup Guide
- Video: Review of Blue Ox Towed Vehicle Battery Charge Line Wiring Harness - BLU44ER
- Shop: Trailer Wiring
- Shop: Blue Ox Towed Vehicle Battery Charge Line Wiring Harness
- Shop: Towed Vehicle Battery Charge Line Kit for Demco Air Force One and Stay-IN-Play Duo Braking Systems
- Shop: Trailer Hitch
- Search Results: curt 56407
- Search Results: battery charger
- Shop: EZ Connector Custom Vehicle Wiring Harness w/ Magnetic 7-Way Trailer Connector - Watertight Seal
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: RoadMaster 6-Wire Flexo-Coil Kit
- Video: Setting up the Curt Custom Tail Light Wiring Kit for Towed Vehicles on a 2023 Jeep Wrangler
- Search Results: rv plug adapters
- Search Results: plugs into vehicle wiring flat tow wiring harness
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Shop: TowSmart Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Video: Review of Roadmaster Flat Tow Wiring Harness - 4 Diode Universal Wiring Kit Towed Vehicle - RM-154
- Video: A Closer Look at the Pop-Up Drain Without Overflow for Vessel Sink
- Video: LaSalle Bristol Single Bowl RV Kitchen Sink Feature Review
- Search Results: trailer hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: Trailer Wiring Diagrams
- Video: An In-Depth Look at the Roadmaster Battery Charge Line Kit for Towed Vehicles
- Video: An In-Depth Look at the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer wiring
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: Lug Nut Torque Chart for Trailer Wheels
- Search Results: trailer tires and wheels
on Flat Tow Wiring Harness
Lazer S.
10/27/2025
Hey John, how did the Curt T-Connector harness work out on your Jeep JL? Did it plug into your existing harness the way you needed? Your update could make it easier for others trying to match that same setup.