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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: C42WR
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$91.29
Retail:$117.95
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Custom Fit Vehicle Wiring

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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance. 1-800-940-8924 to order CURT custom fit vehicle wiring part number C42WR 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 - C42WR

  • 4 Flat
  • Trailer Hitch Wiring
  • Custom Fit
  • CURT

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily
    • Locate connection points behind tail lights
    • Plug in T-connector
    • Run hot lead to car battery
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to battery to avoid overloading vehicle's electrical system
  • Constructed using surface-mount technology (SMT) for consistent, reliable performance
    • Maximizes trailer light yield and intensity while producing minimal heat
    • Ensures superior operation in rough road conditions
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage:
    • Stop/turn lights: 3 amps per circuit
    • Tail lights: 6 amps per circuit
  • Limited 1-year warranty


Installation

This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. Once you've plugged in the T-connector, run the hot lead up to your car battery. Connect the lead to the included fuse holder, and then connect the fuse holder to the positive terminal on your battery.


Once installation is complete, the 4-way connector will be stowed in an out-of-the-way location within your cargo area.


It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.


Powered Tail Light Converter with Surface-Mount Technology

A tail light converter is built into this T-connector. This converter is a circuit-protected, battery-powered unit that bypasses the electrical routes that are used by a basic wiring harness. As a result, there is virtually no draw on your tail light circuits.


Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.


Curt builds each tail light converter using surface-mount technology (SMT). This method of construction involves soldering electronic components directly to the surface of a printed circuit board. SMT eliminates the need for leads, which are used in older through-hole technology. The result is a circuit board that is smaller yet provides more routing area and that offers superior performance, reliability and durability.


Curt SMT Circuit Boards

Circuit boards constructed using SMT have been shown to perform better under rough conditions with excessive vibration than those made using the through-hole method. And where would vibration be more likely to occur than in towing applications? Curt converters also produce less heat, leading to increased durability and longer life. In addition, lower levels of resistance ensure better performance, especially for parts that operate at higher frequencies.


Each Curt circuit board is made using high-quality components that are pieced together in the most technologically savvy fashion, leading to greater predictability and reliability in functioning.



56468 Curt T-Connector Vehicle Wiring Harness with 4 Pole Trailer Connector

Installation Details C42WR Installation instructions

This Product Fits The Following Vehicles




Customer Satisfaction Score:


Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C42WR

Average Customer Rating:  4.7 out of 5 stars   (110 Customer Reviews)

Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.

by:

Good product. All the necessary supplies. Direction's photos a little hard to decipher but great on line video of installation instructions.Leads from driver side connections to converter could be a little longer to allow for more choices for underside install of converter. Probably better to try to get converter behind driverside breaklights wiring cover panel.



by:

Kelsey was a great help. Courteous and knowledgeable. I haven’t installed the part yet, but have no reason to believe everything will work. Will come back for my trailers camper needs.



by:

Great product. Right price, fast delivery, and quick response time. Thank you.



by:

Excellent harness, fit as it should



by:

Nice and easy set up



by:

First of all, I initially ordered the wrong item and reached out to etrailer. I spoke to Will S. in Customer service, who could not have been more professional, courteous and helpful. In the past few years, most corporate customer service has been horrible, but not at etrailer, it was exceptional. Will S. is an asset to the organization and I will be using etrailer in the future simply because of the experience I had correcting my own mistake. Thank you Will.

Regarding the setup, it was a bit more difficult than I thought it would be. The reviews said a simple setup, but the definition of simple is subjective.

A few months ago, I ordered a receiver and wiring harness for my Subaru CrossTrek the reviews said installing the harness was 'simple'. I didn't believe it, but when I installed the harness, the wiring process involved simply plugging in the harness. (Just plug the harness into the factory plug behind the rear seat). Yes I had to lift the carpet a bit to find the plug, but that was it.

This harness for my Ford Bronco, involved disconnecting the tail lights and inserting the harness plug mid-stream between the separated connectors. This was not too bad, but the installation also required running a power line to the battery.

Fortunately, the Bronco has powered Aux switches, so I ran the wire to the number 6 Aux connection and it worked great. Then I spent the next hour shimmying under the vehicle to thread the power line through and tie-wrap it to other wires under the vehicle.

So, yes the installation is simple. However, as stated previously, simple is a subjective word.

Etrailer Expert

Jenny N.

2/25/2023

Yep, it really depends on the vehicles wiring as to how simple the installation will be. I appreciate a good shortcut however I need to say that actually running the power wire to the battery is the best bet. Wiring it to anywhere else may damage the vehicle wiring as it could overload it. I have a helpful FAQ for tips on running the wire to the battery.



by:
2023 Ford Bronco

Everything work as expected !



by:

Product was for LED Broncos, mine is a Base. Had to have a trailer shop swap wires in the harness. Worked for a while and now one brake light on the Bronco is out. Ripping this out and getting the proper Ford harness.



by:

Easy to install. Works great.



by:

Really easy to install, on the bronco I ran it behind the paneling and use the 12v outlet for power. The wiring stored in the jack compartment. It’s a cleaner install than putting everything under the car.



by:

It was straight forward and functional.



by:

Great product and service. Thank you

Kevin

10/22/2023

still working great

Etrailer Expert

Mike L.

11/10/2023

@Kevin Great, glad to hear that!


by:

Very easy installation. Incredible product at a great price.



by:

Very happy with the quality and ease of installation.



by:

It worked out after I modified the wiring. This harness is for bronco with LED lights.



by:

Good instructions and all worked just fine for my 2022 Bronco.



by:
2021 Ford Bronco

2021 bronco. Great quality but… the passenger taillight plugs had the wiring wrong. I found that the right blinker wasn’t working because of the way they had the pins pushed into the plugs in the wrong location. They had the pin for turn signal in a part of the plug that didn’t go to anything on the vehicle side. The green wire should have been where the white wire with black mark is. I was able to pull the plugs apart and move the pins into the correct locations. CURT NEEDS TO FIX THIS.
And maybe it was only the one I received.

Etrailer Expert

Thomas M.

1/24/2022

I have reached out to Curt, they mentioned that this harness will only work with LED tail lights. They have passed this issue to their engineering team to research.



by:

This wiring harness was a piece of sh@t! If it wasn’t for the guy on the [onllne] channel “Budget Bronco” I never would of gotten this thing to work. Watch the video!

Etrailer Expert

Jenny N.

9/20/2022

I recommend watching the video review that we have in the link below.



by:

The OEM kit requires tapping into existing wires which increases risk of corrosion. This kit taps into existing connectors to alleviate that risk. I did modify it so it fits the OE hitch to look like it was factory installed. It was easy to install, works perfect, and eTrailer was great with the order and shipping, too.



by:

The wiring harness worked, I put the other harness on and no left or right

lights, this c42wr did the job. thanks
the other items have not installed yet next project



by:

Worked nice for what I needed it to do on my trailer.Easy install great service E Trailer thank you



by:

Wiring worked perfect. Installed in a couple hours and towed it home.



by:

The description of this needs to have a warning for LED tail lamps only. I’m going to change the pins around but this will not work for non LED. There is nothing listed about this that says LED until you get to the reviews. Come on etrailer be better!

Etrailer Expert

Jenny N.

4/6/2022

When the fitguide is used for a 2021 Ford Bronco and the wiring harness option is ed there is a down menu to choose whether the Bronco has LED tail lights. For those without LED tail lights you would want to use part # 119190KIT.



by:

Installed on a customers vehicle. No right rear turn signal was my reward. Made me look like a fool when I said sorry but I have to call the company and you’ll have to bring your brand new Bronco back again. After speaking with a rep who was helpful she read the reviews and was like yeah sorry some of them are wired wrong. I’d pay 2 3 4 times as much for a quality part that lasted is a 60k dollar ride.



by:

The wiring harness I received does not fit my 2022 bronco had to return it and order a new one.

Etrailer Expert

Mike L.

8/26/2022

It could be possible you purchased the wrong harnesss. The Curt # C42WR you purchased is for 2022 Ford Bronco models with LED taillights. If you do NOT have LED taillights, youd need part # C87BR instead.


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  • Best 4-Way Trailer Wiring Harness For 2023 Ford Bronco
    Good question, and for your 2023 Ford Bronco the best 4-way trailer wiring harness is frpm Curt, with the correct one for your Bronco depending on if your Bronco has LED taillights or not: - WITH LED Taillights: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C42WR - WITHOUT LED Taillights: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C87BR
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  • Will the Curt Vehicle Wiring Harness Work on 2021 Ford Bronco With LED and Halogen Taillights
    The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C42WR is designed to fit a 2021 Ford Bronco with LED taillights. This will not work with your LED and Halogen lights. For your 2021 Ford Bronco, I recommend the Tekonsha T-One Vehicle Wiring Harness # TK99VR. We have found Tekonsha to be the most reliable when it comes to a 4-way wiring harness like this. This wiring harness uses the same style t-connector which plugs into your existing wiring for a 4-way...
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  • Recommended Wiring Harness for a 2023 Ford Bronco
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  • Selecting the Correct Curt T-Connector Wiring Harness For a 2022 Ford Bronco
    There are 2 different Curt T-Connector Vehicle Wiring Harness for your 2022 Ford Bronco as one is compatible with LED tail lights while the other is for models with incandescent tail lights. For LED tail lights you will need the Harness # C42WR. For incandescent tail lights you will need the Harness # C87BR.
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  • 2023 Ford Bronco Wildtrak Trailer Hitch and Wiring Recommendations
    Since flat tow wiring is designed to receive a signal and trailer wiring harnesses are designed to send a signal you will need a second wiring harness on your 2023 Ford Bronco Wildtrak, but it will be a style that tees in so it will fit with the Curt flat tow wiring. Here are the parts I recommend installing on your Bronco: - Draw-Tite Max-Frame Trailer Hitch Receiver # DT37GR - Curt Wiring # C42WR (for 4-Way flat) OR Tekonsha Wiring # TK55VR (for 7-Way) - Wiring Bracket # BK4F (for...
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  • Correct 4-Way Trailer Wiring Harness For 2024 Ford Bronco
    You're right, there are two 4-way trailer wiring harnesses that fit your 2024 Ford Bronco, so the correct fit for yours will depend on if your Bronco has LED taillights or not. So you will need one of the following: - WITHOUT LED Taillights: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C87BR - WITH LED Taillights: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C42WR
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  • Recommended Trailer Hitch Wiring Harness For A 2023 Ford Bronco With LED Tail Lights
    For a 2023 Ford Bronco with LED tail lights you'll need the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C42WR. This harness is fairly simply to install with its plug-in connectors. You will need to mount the ground wire to the frame using the included self-tapping screw and run the black wire to the battery using the butt connectors and fuse holder. Overall, it's a really easy install that you could do yourself at home.
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  • Correct Curt Wiring Harness for 2023 Ford Bronco with LED or Halogen Tail Lights
    It does matter if your 2023 Ford Bronco has LED lights or not, but once you figure that out it's just a simple matter of getting either of these harnesses: - With LEDs # C42WR - Without LEDs # C87BR Both options plug in behind your tail lights and then draw power from the vehicle battery via the included wiring lead. I also recommend picking up the mounting brackets # C57202 and # BK4F so you can secure the 4-Way connector next to your hitch receiver for easy access.
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  • Parts Needed to Add 7-Way to 2023 Ford Bronco
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  • Can wiring harness for trailer lights be installed on 2024 Ford Bronco?
    Yes! You can install the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C87BR if your 2024 Bronco does not have LED tail lights. If it DOES have LED tail lights then you'll instead need Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C42WR. Each of these kits include everything you'll need for the installation and use. I attached an installation video, but basically you'll connect the converter's black wire to battery positive,...
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  • Recommended Trailer Hitch Receiver for Towing With 2023 Ford Bronco
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  • Recommended 4-Way Wiring Harness for a 2021 Ford Bronco
    The Curt Wiring Harness item # C42WR is the same as part number 56468. We just use a different inventory number than Curt does. This wiring harness is confirmed to fit the 2021 Ford Bronco's with LED lights. If your Bronco has incandescent bulbs you will need item # C87BR.
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  • Curt Trailer Wiring Harness that Fits 2021 Ford Bronco
    Curt has a trailer wiring harness that fits your 2021 Ford Bronco with the part # C42WR which is a plug and play style of harness but the part number you mentioned is not the correct kit to use.
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Do you have a question about this Custom Fit Vehicle Wiring?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video by:
Dustin K
Employee Chris R
Video by:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Jonathan Y
Video Edited:
Jonathan Y
Employee Mike S
Written by:
Mike S
Employee Bradley B
Test Fit:
Bradley B
Employee Ian F
Test Fit:
Ian F

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