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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: C42MJ
In Stock
$73.96
Retail:$120.95
You Save: 39%
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 C42MJ 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)
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  • Videos (1)
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CURT Custom Fit Vehicle Wiring - C42MJ

  • 4 Flat
  • Trailer Hitch Wiring
  • No Tow Package
  • Vehicle End Connector
  • CURT
  • Plug-In
  • Powered Converter
  • 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: 3 amps per circuit
  • Tail lights: 6 amps per circuit

Warranty:

  • 1-Year limited warranty


56548 CURT T-Connector - Surface Mount Technology - 4 Wire

Installation Details C42MJ 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 - Trailer Hitch Wiring - C42MJ

Hi everyone, Steven here with etrailer.com. Today we're looking at our CURT T-connector vehicle wiring harness with a four-pole flat trailer connector. Now folks, this is a custom fit application. It looks like it's gonna fit a 2015 through current year Ford Transit T350 without a factory trailer connector. So I want you to verify that with our fit guide here at trailer.com. On our homepage, enter things like your make and model under My Vehicle Information.

Make sure you're getting the right parts the first time. Keep in mind these videos can be outdated and it could fit potentially newer years. Now this again, custom fit, what you're gonna do is in the trunk area, most likely of your vehicle, you're gonna be installing this modular box and these T-connectors, we call them T-connectors because of the shape. Now if you could picture the letter T here, right And what you're gonna do is you're gonna unplug the factory plug behind that taillight in your trunk area, and then this will plug right into that spot or this one, whichever one you unplug will match up, and then you'll plug the one you unplugged into this other one, thus creating a connection without cutting or splicing. As you can see, you got a ground wire here.

You got your four-pole connector that would go out the back to then attach to your trailer. You have a black wire here that's gonna be for power that's gonna run all the way up to the battery with this included wire. And you're gonna have an inline fuse, and the fuse and all the butt connectors you need and the cable ties to make those connections and keep that wire nice and clean are included. This is a dust cover. It's gonna go right over the end of the four-pole connector once you've got everything installed.

Now this modulator box, this basically is a power converter. For safety, it's going to keep all the signals, input and output being the correct amp, wattage, et cetera that's needed to then communicate with the trailer wiring and the lights and everything to make sure everything's working correctly, and also to help prevent backfeeding or any kind of things like that. So, very nice unit, the power unit there is very essential. Again, you get everything here out of the box. So it should be a pretty simple installation for the most part, just follow the included instructions.

We might also have some videos on our website as well for your particular installation. Folks, that is gonna wrap it up for our look together. I'm Steven, as always, stay safe while you're towing.


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


Info for this part was:

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

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