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

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

Item # C42WR
Retail:$117.95
Our Price: $102.23
You Save: $15.72
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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  • Reviews (100)
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CURT Custom Fit Vehicle Wiring - C42WR

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • 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   (100 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:

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:

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:

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:

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



by:

Very happy with the quality and ease of installation.



by:

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



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:

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:

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:

Very easy to install.



by:

This was has been a great purchase. Fast delivery, and easy install! I recommend it hightly!



by:

I have a 22 Bronco, wiring harness arrived 2 days early. So easy to install, finished in about an hour. Everything functions as it is suppose to. Excellent product, excellent customer service response getting harness out in the mail. Recommend to all.



by:

everything works as it should!



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:

The install went flawlessly.



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.



by:
Ford

I'm a little bummed that Ford didn't provide a more friendly provision for this as a standard item. Thumbs up to Curt for making a best effort in development of a solution. While I would appreciate something a little more finished, I appreciate the ability to configure and finish in an OEM fashion. Thanks Curt, thanks etrailer!



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:

Super easy to install. Works as expected


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Show More Reviews

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

  • Running lights Not Coming On Trailer After Installing The Wiring Harness # ETBC7
    With all the other functions working properly it sounds like you may have ran into a ground issue. You need to make sure all of the lights are grounded to a clean and corrosion free bare metal surface. If there is anything between the light ground and the metal trailer frame could interrupt the ground. Running jumper wires from the light grounds to the main trailer ground connector ground could help as well.
    view full answer...
  • Troubleshooting Curt T-Connector Wiring Installation on a 2022 Ford Bronco Badlands
    It sounds like something is wrong with the Curt T-Connector # C42WR you've installed on your 2022 Ford Bronco. To start off checking you'll want to look at the 12V power connection and the ground connection. Make sure there is power getting from the battery to the convert box and that your ground is securely connected to a clean, bare-metal surface. Also make sure the wiring is in good shape without any bends or exposed wiring. If all of that looks good then the next step is to test the...
    view full answer...
  • Can Curt Wiring Harness Power Wire Connect to 2023 Ford Bronco Auxiliary Switch
    I reached out to Curt about this and they said the power wire for the # C42WR must run directly to the battery. It would be really convenient if it worked with the auxiliary switches, but you would potentially blow the fuses and cause other problems with your 2023 Ford Bronco if you installed it that way.
    view full answer...
  • Wire Gauge Used On Curt T-Connector Vehicle Wiring Harness # C42WR
    Per Curt their T-Connector Vehicle Wiring Harness # C42WR uses 14 gauge wire for the harness.
    view full answer...
  • 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.
    view full answer...
  • Does Curt Trailer Wiring Harness for 2021 Ford Bronco Work with LED Taillights
    Yes, the Curt trailer wiring harness part # C42WR is a confirmed fit for your 2021 Ford Bronco with LED taillights. This kit was actually designed for the versions of the vehicle that have LED taillights.
    view full answer...
  • Which Wiring Harness Fits 2023 Ford Bronco Sport
    The Curt T-Connector Vehicle Wiring Harness # C47WR is the same as the 56462. You were looking at wiring harnesses for the 2023 Ford Bronco which are different than the one for the Bronco Sport. This wiring harness works no matter what taillights you have.
    view full answer...
  • Complete Towing Setup For A 2022 Ford Bronco
    Yes, for your 2022 Ford Bronco, you can use the Curt Trailer Hitch Receiver # C76WR. This hitch will bolt to your vehicles frame, has a maximum towing capacity of 3500-lbs, and a maximum tongue weight of 350-lbs. You'll want to check your vehicle owners manual for your vehicles maximum towing capacity, and compare that to the hitches maximum towing capacity, and use the lowest rating between the two. You may also want wiring so your trailer, or hitch mounted accessory has lights while...
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  • No Trailer Running Lights While Using Curt Echo Wireless Brake Controller
    The Curt Echo Wireless Brake Controller part # C51180 is just a pass through for all trailer circuits except for the trailer battery charge line and trailer bake output. If you're having issue with the trailer lights while using the controller it's likely just a poor fit between the pins either on the vehicle to controller or controller to trailer plug. I recommend removing the controller, checking the pins, then reinstalling. If the issue still persist then replace the controller under...
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  • Recommended Trailer Hitch Receiver And Trailer Wiring Harness For A 2021 Ford Bronco
    For your 2021 Ford Bronco I recommend the Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # C76WR. This hitch has a simple no-drill, bolt-on installation comes with all of the necessary hardware included. The gloss black powder coat finish over protective base coat is going to offer a superior rust resistance to last a lifetime. For the trailer wiring harness I recommend the Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector # C59236 if you do not have LED...
    view full answer...
  • How to Install Curt Trailer Hitch on 2024 Ford Bronco
    It honestly couldn't be any easier to install the Curt trailer hitch on your 2024 Ford Bronco, and I'll explain but first here is the correct part number for the hitch that fits: - Curt Trailer Hitch Receiver # C76WR Now, to install the # C76WR all you do is lift it up, insert the included bolts through the holes, and torque them. That's literally all there is to it. I have added a cut out below of the instructions showing the complete install so you can see how simple it is. If you...
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    Image 1 for
  • 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
    view full answer...
  • Trailer Hitch Receiver Fit For 2024 Ford Bronco
    We do have a trailer hitch that fits your 2024 Ford Bronco, at the following part number: - Curt Trailer Hitch Receiver # C76WR I verified this fit directly with the manufacturer for you. I also wanted to add that if you are looking for a 4-way trailer wiring harness the correct fit will depend on if your Bronco has LED taillights or not: - WITHOUT LED Taillights: T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C87BR - WITH LED Taillights: T-Connector Vehicle...
    view full answer...
  • Recommended 7 Pin Connector For A 2021 Ford Bronco
    When it comes to installing a 7 pin connector on your 2021 Ford Bronco with LED Taillights you first will need The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C42WR. Next you will need The Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires # ETBC7.
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    Image 1 for
  • 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.
    view full answer...
  • 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.
    view full answer...
  • Selecting Correct Curt 4-Way Vehicle Wiring Harness For Towing With a 2024 Ford Bronco
    You simply need to look at the tail lights on your 2024 Ford Bronco to see if you have LED or incandescent tail lights. For LED tail lights we have the Curt # C42WR. And for incandescent tail lights we have the Curt # C87BR.
    view full answer...
  • Correct Curt 4-Way Trailer Wiring Harness For 2023 Ford Bronco
    The correct Curt 4-way trailer wiring harness for your 2023 Ford Bronco will depend on if your Bronco has LED taillights or not: - WITH LED Taillights: T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C42WR OR - WITHOUT LED Taillights: T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C87BR
    view full answer...
  • Correct 4-Way Wiring Harness for 2023 Ford Bronco With LED Lights
    Since you have LED lights on your 2023 Ford Bronco you want to use the Curt # C42WR. This will plug into the connection point behind your tail lights and provide you with a 4-way to power your trailer's signal lights. The # C87BR you looked at is for vehicles with incandescent or halogen lights.
    view full answer...
  • 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
    view full answer...
  • 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.
    view full answer...
  • Does the Curt Hitch 13493 Fit a 2024 Ford Bronco?
    Yes, it does. The Curt Hitch 13493 or our part number item # C76WR is confirmed to fit the 2024 Ford Bronco. This hitch is custom fit and bolts to your Bronco with included hardware. This is a class III hitch with a 2" receiver. It has a 3,500 lbs towing capacity and 350 lbs maximum tongue weight. I really like this hitch because of how easy it is to install it. You only have to install four bolts to your rear bumper to get this hitch set up. I have linked an installation video below along...
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  • Recommended Wiring Harness for a 2023 Ford Bronco
    The correct wiring harness for your 2023 Ford Bronco will depend on whether or not you have LEDs. Both harnesses are custom fit and plug in behind your tail lights. LED - Curt T-Connector Vehicle Wiring Harness item # C42WR Non- LED - Curt T-Connector Vehicle Wiring Harness item # C87BR I saw you were looking at the Curt Trailer Hitch Receiver item # C76WR. This hitch is confirmed to fit your 2023 Ford Bronco. I have linked an installation video below. To round out your towing setup...
    view full answer...
  • Will Curt Trailer Hitch Receiver Fit 2023 Ford Big Bend Bronco
    Yes, the Curt Trailer Hitch Receiver # C76WR fits all models of the 2023 Ford Bronco. That includes your Big Bend trim. It has a simple bolt-on installation and comes with a limited lifetime warranty. If you plan on towing, you will also need wiring and a ball mount. If you have LED taillights you need the # C42WR and for incandescent you need # C87BR. For a ball mount, check out the Curt Towing starter kit # C45534. This comes with a 2" ball, hitch pin, hitch receiver lock, hitch cover,...
    view full answer...

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 Wilson B
Updated by:
Wilson B
Employee Mike S
Written by:
Mike S
Employee Bradley B
Test Fit:
Bradley B

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