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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: C32MJ
In Stock
$91.34
Retail:$142.95
You Save: 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 C32MJ 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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  • Reviews (1)
  • Q & A (0)
  • Videos (1)
  • Photos

CURT Custom Fit Vehicle Wiring - C32MJ

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

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: 3 amps per circuit
  • Tail lights: 6 amps per circuit

Warranty:

  • 1-Year limited warranty


56551 CURT T-Connector - Surface Mount Technology - 4 Wire

Installation Details C32MJ 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 - C32MJ

Hi everybody, Andy here with etrailer.com. Let's take a real quick look at this CURT T-Connector Vehicle Wiring Harness with four-pole flat trailer connector. Now, this wiring harness has been designed to fit your 2025 and newer Kia Carnival without the LED tail lights. 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. As you know, a well-lit trailer is going to be a safe trailer, 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.

So whether you're hauling a boat to the lake or a camper to the mountains, your lights are gonna stay bright and visible. So this is gonna give you this four-way flat trailer connector at the back of your vehicle to power those trailer signal lights. This is also going to be compatible with five, six, and seven-pole adapters. Those adapters are sold separately. And if you notice, this does come with a dust cap to keep that four-way flat connector clean when it's not in use.

Now, these custom fit T-connectors are going to snap directly into your factory wiring harness so you can get your trailer signal lights up and running without any cutting or splicing. You're just gonna plug it in and you're gonna be ready to tow. Now your vehicle's wiring harness is often behind a trim panel or under the cargo floor. Some vehicles may require removing the interior panels or lifting carpeted sections to reach it, but once you access it, the harness is going to install easily with these T-connectors. The instructions will guide you through the installation process, showing you where you can find the harness on your vehicle.

Now, some vehicles can't handle the extra electrical load of trailer lights. The built-in powered converter right here is going to draw power directly from your battery. So that's going to ensure a steady, protected current to your trailer while keeping your vehicle circuits from overloading. So this kit is going to come with everything that you need. It's going to come with a fuse holder, fuse, cable ties, butt connectors, a terminal, a ring terminal rather, for your battery when you're installing this to your battery.

Wiring to run to your battery as well. So everything that you're gonna need to get this up and running. And it is also recommended that you use a small amount of dielectric grease on all of your electrical connections, like the plugs on the vehicle end and the four-pole flat 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, our item number for that grease. You can just take that number and pop it in the search field of our website. That will take you to the grease and you can add that to your order. If you do decide to pick this up, we would love to hear back from you regarding how the installation went and how using this wiring harness is working out for you. So you can share your experience with us by dropping a comment or leaving a review on this product page. We would love to hear back from you. Well, I think that's gonna wrap up our look today. I do hope that it was helpful for you. Again, my name is Andy, thank you for joining me.

Ratings & Reviews

5.0

1 reviews
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.

by:
2025 Kia Carnival

Easy too install. If installing on a 2025 Kia Carnival though the instructions for the tail light removal is misleading. It says to remove the tail lights by pulling outward on them from the side of the vehicle but the tail lights have to be pulled out by standing behind the vehicle. But the lights work great. Will be towing a trailer across country so will update review after.

Brooke M. profile picture
Etrailer Expert

Brooke M.

6/7/2025

Thanks for the heads up tip about the lights! That is good to note. When do you embark on the road trip?


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See what our Experts say about this CURT Custom Fit Vehicle Wiring

  • Recommended Hitch, Wiring, and Brake Controller for a 2025 Kia Carnival
    Hey Justin, congrats on the new van. Since you do not have the factory tow package on your 2025 Kia Carnival, you are going to need to install two separate wiring harnesses if your goal is to tow a trailer with brakes. I have listed the parts you will need below: 4-Way Connector - If your Carnival has LED lights, you'll need the Curt T-Connector Vehicle Wiring Harness item # C63RV. This custom-fit T-connector plugs into your Kia Carnival's wiring harness, which is located behind the driver's-side...
    view full answer...

Info for this part was:

Employee Katherine B
Edited by:
Katherine B
Employee Andy C
Installed by:
Andy C
Employee Sabrina W
Written by:
Sabrina W

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