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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. 4 Flat
  4. Trailer Hitch Wiring
  5. No Tow Package
  6. Vehicle End Connector
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
CURT

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Part Number: C58MJ
In Stock
$133.59
Retail:$184.95
You Save: $51.36
Custom Fit Vehicle Wiring

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Easily add a 4-way trailer connector with this custom-fit harness. The T-connector plugs into existing wiring - no cutting needed. Powered converter protects vehicle circuits and ensures consistent trailer lighting for safe towing in any conditions. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C58MJ or order online at etrailer.com. Free expert support on all CURT products. Great prices and Fastest Shipping for Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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CURT Custom Fit Vehicle Wiring - C58MJ

  • 4 Flat
  • Trailer Hitch Wiring
  • No Tow Package
  • Vehicle End Connector
  • CURT
  • Powered Converter
  • Plug-In
  • Plug and Lead

Easily add a 4-way trailer connector with this custom-fit harness. The T-connector plugs into existing wiring - no cutting needed. Powered converter protects vehicle circuits and ensures consistent trailer lighting for safe towing in any conditions.


Highlights

  • Custom-Fit For Easy Installation: Plugs directly into existing vehicle wiring, no cutting needed.
  • Powers Essential Trailer Lights: Supports brake lights, turn signals, and running lights.
  • Powered Converter For Safety: Uses a direct battery connection to avoid overloading circuits.
  • Fully Insulated Wiring: Reduces risk of shorts and interference with other electronics.
  • Weather-Resistant Construction: Protective sleeve and sealed connections prevent corrosion.
  • Complete Installation Kit Included: Comes with fuses, connectors, and zip ties for a secure fit.

Features to Know About

Straightforward Installation, But Plan for Access

The vehicle's wiring harness is often behind a trim panel or under the cargo floor. Some vehicles may require removing interior panels or lifting carpeted sections to reach it, but once accessed, the harness installs easily with quick-splice connectors.

No Cutting or Splicing Needed: Custom-Fit T-Connector

Plugging in a trailer shouldn't mean tearing into your vehicle's wiring. This custom-fit T-connector snaps directly into your factory wiring harness, so you can get your trailer lights up and running without any cutting or splicing. Just plug it in, and you're ready to tow.

Reliable Trailer Lighting for Every Trip: Powers Brake, Turn, and Running Lights

A well-lit trailer is a safe trailer. This 4-way wiring harness keeps your trailer's brake lights, turn signals, and running lights powered and in sync with your vehicle. Whether you're hauling a boat to the lake or a camper to the mountains, your lights stay bright and visible.

Prevents Overloaded Circuits: Powered Converter for Safe Towing

Some vehicles can't handle the extra electrical load of trailer lights. The built-in powered converter draws power directly from your battery, ensuring a steady, protected current to your trailer while keeping your vehicle's circuits from overloading.

Keep Wires in Check: Fully Insulated and Weather-Resistant

Towing means exposing your wiring to dirt, rain, and road grime. This harness features fully insulated wires and a sealed converter, helping to prevent shorts and corrosion. It's built to withstand the elements so you can tow with confidence in any weather.

Everything You Need for a Clean Install: Complete Kit Included

No extra trips to the hardware store - this kit comes with everything you need. With fuses, zip ties, and connectors included, you can complete the installation without hunting down extra parts.

Specs

Maximum amperage:

  • Stop/turn lights: 5 amps per circuit
  • Tail lights: 7.5 amps per circuit

Warranty:

  • 1-Year limited warranty


56539 CURT T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Installation Details C58MJ Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Video of Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of CURT Custom Fit Vehicle Wiring - T Connector Vehicle Wiring Harness 4 Pole Flat - C58MJ

Hi everybody, Andy here with etrailer.com. Let's take a real quick look at this Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer connector. Now, this harness has been designed specifically for your 2024 and newer Lincoln Nautilus. And on custom fit parts such as this harness, I do recommend taking advantage of our vehicle fit guide here at etrailer.com. Simply input the year, make, and model of your vehicle and our fit guide will confirm if this will work for you or if we have something comparable that will work for you. Now, this is going to give you a four-way flat trailer connector at the back of your vehicle to power your trailer signal lights.

This will also be compatible with five, six, and seven pole adapters, and those adapters are sold separately. This does come with a dust cap for the four-way flat connector to keep that plug connected from dirt, debris, moisture when it's not in use. And a well lit trailer, as you know, is going to be a safe trailer. And so this four-way wiring harness is going to keep your trailer's brake lights, turn signals, and running lights powered and in sync with your vehicle. Whether you're hauling a boat to the lake or a camper to the mountains, your lights are gonna stay bright and visible.

The custom fit T-connectors are going to snap directly into your factory's wiring harness, so you're gonna be able to get your trailer lights up and running without any cutting or splicing. You're just going to plug these in and you'll be ready to tow. Now, the vehicle's wiring harness is often behind a trim panel or under the cargo floor. Some vehicles may require removing interior panels or lifting carpeted sections to reach it, but once you access it, the harness is going to install easily with these quick connectors, as you can see here. And again, these are custom fit for your vehicles.

The included instructions will guide you through the installation process. Now, some vehicles can't handle the extra load of the trailer lights, and so the built-in powered converter that you see right here is going to draw power directly from your vehicle's battery, and that's going to ensure a steady, protected current to your trailer while keeping your vehicle circuits from overloading. So this kit's gonna come with everything that you need to get this installed into place. You're gonna get the harness, you're gonna get wiring, this is going to run to your vehicle's battery, you're gonna get a fuse holder, and then you're going to get cable ties to secure excess wiring, butt connectors, a fuse, and as I said, instructions to guide you through that installation process. So everything that you're gonna need to get this into place.

Now, it is also recommended that you use a small amount of dielectric grease on all of your electrical connections, like the plugs on your vehicle and the four pole connector itself. That grease is designed to help prevent electrical failures caused by corrosion and moisture. So on your screen, I am including our model number for that grease. You can just take that model number, pop it in the search field of our website, that will take you to that grease, and you can add that to your order. Now, once you get this installed into place, we would love to hear back from you regarding how the installation went, and also regarding your experience using this wiring harness. So when you get some time, drop us a comment on this product page and let us know your experience in getting this harness into place and using it and send us some photos of it in action as well. We'd love to see it. Well, that's gonna wrap up our look today. I do hope that our time together has been helpful for you. Again, my name is Andy. Thank you for joining me.

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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Katherine B
Updated by:
Katherine B
Employee Andy C
Installed by:
Andy C
Employee Sabrina W
Written by:
Sabrina W

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