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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 # C33HR
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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. 1-833-496-1390 to order CURT custom fit vehicle wiring part number C33HR or order online at Free expert support on all CURT products. Guaranteed Lowest Price 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 (12)
  • Q & A (0)
  • Videos (2)
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CURT Custom Fit Vehicle Wiring - C33HR

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • Powered Converter
  • 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.


  • 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


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


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 light housings. 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 beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure. 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.

56445 CURT T-Connector - Surface Mount Technology - 4 Wire

Installation Details C33HR Installation instructions

This Product Fits The Following Vehicles

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 Curt T-Connector Vehicle Wiring Harness Installation - 2020 Nissan Rogue Sport

Hey everybody, Clayton here at Here at etrailer, we install, test, and review a lot of different products to help you as a customer make more educated decisions before you purchase. Today we're gonna be working on a 2020 Nissan Rogue Sport. We're gonna be taking a look at, and I'll be walking you through how to install the Curt T-connector harness with a four flat. Adding a 4-pole to the back of your Rogue is gonna be a great upgrade. This is gonna allow us to tow a trailer safely.

We're gonna get all those necessary lighting functions to the back of our trailer. We're gonna get our taillight signal, our brake signal and our turn signals. Also there's a lot of cargo carriers and bike racks out there that do require lights. So this is gonna work great for you. Our four pole is going to work with five, six and seven-pole adapters and all of those can be found here at etrailer.

Now this kit is pretty nice. Everything's gonna be included. It's gonna be a plug and play set up. So you're not gonna have to splice into any of your wiring. One thing I really like is that the module box that comes with the kit is gonna protect our factory wiring from any shorts or anything that might happen on the trailer side, then we can make sure that our stock wiring is protected.

In terms of installation, getting this thing installed really isn't too bad. The hardest part is gonna be running our wire from the rear of our vehicle up to the front. With that being said, let's take a look at the installation together now. To begin our installation we're gonna be working in the rear of our Rogue. I'm gonna open up our trunk.

We're gonna come over to our taillight housings. We're gonna have two 10 millimeter screws to remove on each side. With our hardware removed, we now want to pull out our taillight assembly. Now this is going to be pretty tough. Our pins are very tight and the edges of our lights are super thin. So if you grab a trim panel tool and pry on these edges, you need to be really careful but you're gonna have to pull really hard out and kind of pry, kinda work your way around and kind of pry that back 'cause it is gonna pull out towards the rear. So we'll go ahead and do this on both sides. Pry it out, just like that. Then on the bottom of our connectors, yellow push pin fastener for lighting and push that and pull out on that pin. Repeat that on the other side. And I want to grab our wiring. We're gonna grab our side that has the yellow wire. I'm gonna plug that into our factory wiring. That's gonna take that tab, face it upwards push it in 'til you hear a click. We will need to ground our wire up here, and then grab our provided self-tapping screw with our ring terminal. We're just gonna ground that right here. You don't want over tighten this 'cause you don't want to strip it out, but you want to make sure it's nice and snug and that that ground isn't going to shake. We can then take our module and the rest of our wiring and drop that down through the opening right here and grab it at the bottom. Now I want to get all of our wires pulled down. I went ahead and already did that but we need to leave our green wire up. It isn't long enough to make our connection running completely underneath the vehicle, but to get it to the passenger side, all we're gonna do is remove these 10 millimeter bolts on our fascia. Kind of tuck it down here and pull it over that way. That way we do get a little bit of extra length. As you can see, now we have enough clearance. So you just wanna plug these in the same way that we did over on the driver's side. Then we can reinstall our tail lamp assembly in the reverse order we took it off. Now, I connect your power wire. I'm gonna use a heat shrink butt connector. The one that comes in your kit is not heat shrink. It'll work just fine, but I prefer using the heat shrink. You can find these here at etrailer. We're just gonna crimp that onto our wire. Then we wanna grab our long power wire. We're gonna strip the end back. We're gonna add this to the other side of that butt connector. We can grab our heat source and shrink it down. You can then add some electrical tape to help ensure a good connection. We now run our power wire up to our battery. I'll go ahead and do it. And then we'll show you the route we took. The black wires can come out right here by our module. And I ran it up and over our sub frame. You want to make sure to stay out of the way of anything hot or moving. Then we just ran it up this way. And the wire comes down next to our fuel tank. Now I took that wire and just tucked it underneath this heat shield, then it runs down underneath that heat shield. It comes out right here between our heat shield and our underbody panel. All I did was take that and push it through our underbody panel. That's gonna follow this line here. Then it comes out right here and I just ran that up to our frame rail here. There was a nice opening here with a hole, so we just pushed that through and pulled it out. Then I grabbed our airline tube to use as a pull wire. I ran that up to the engine bay. You want to again, make sure you stay out of the way of hitting hot or moving. So we just pushed that up next to our battery. Now we can jump up top and get that wire pulled tight. This is where airline tube comes out and we're just going to pull that wire till it's nice and tight. Just like so, then we can make our connection to the battery. We have part of our airbox covering our battery. So we are gonna have to remove that. We're gonna grab a small flat blade screwdriver, pry up on this plastic pushpin, then we can lift up on our airbox. Kind of wiggle this out of position and lift up like so. Now I'm gonna lift up on our battery cover. That's gonna reveal a 12 millimeter nut. You don't wanna take that all the way off yet but we'll just leave it nice and loose. Then we wanna grab our power wire. We're gonna trim that off. We have our wire strippers, strip back this end. With our wires stripped back, we can grab our heat shrink butt connector, crimp that on. Now I wanna grab our fuse holder. Our fuse holder is going to come pre-stripped. I usually like to strip it back just a little bit more since we are using the yellow heat shrink butt connector. We can then take our fuse holder, add that to the other side of our butt connector, and we'll crimp that down. And then we're going to strip back the other side of our fuse holder. We'll be adding the provided ring terminal. And with that crimped on, you can then take that nut off that we had loosened, we'll slide on our ring terminal, and then reinstall that nut. Now we want to come back and heat shrink this, just like we did our heat shrink butt connector at the rear. Then we wanna clean up our wiring. I'm just gonna zip tie our wiring to this fuse block. Like so. And we can grab our provided fuse and add that to our fuse holder. And we are now ready to reinstall our airbox. Before we mount our four-way with everything hooked up, we wanna get it tested. So to start off, we're gonna do our taillight signal, and then do our brake lights, our left turn, and our right turn. So when we run our wiring over, there is a really good way. Our module's right here. We're going to take that wiring and zip tie it up high to our factory wiring. And it's gonna come and run over the front of our hitch right here. Then our kit does come with a long zip tie so that's really nice. You can zip tie it back to the hitch and then our wiring sits right here. Then we just wanna grab some dielectric grease. You can find that here at etrailer, if you don't have any. We're just gonna add that to our pins. And it's just gonna keep all of our terminals protected. And that's gonna do it for our look at and our installation of Curt's T-connector harness with a four flat on our 2020 Nissan Rogue Sport..

Customer Reviews

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - C33HR

Average Customer Rating:  4.6 out of 5 stars   (12 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.

2020 Nissan Rogue Sport

The quality of the product is great however the cables are just too short. I'm and electrician and like to dress my cables and I just couldn't make it work without extending the jumper going to the passenger side light. Add 12" and you have something...


Nice kit. Easy to install! Thanks Etrai ler.


Website provided great installation dir ections


Easy install, was done in under a hour


I have not any problems with your product..Thank you for your great customer service and followup!


I received my order in 3 day not in 6 day thank you very much.


Great service


Easy product to install


2021 Nissan Rogue Sport




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

  • Does Curt Trailer Hitch Receiver Fit 2021 Nissan Rogue Sport SV
    Yes, your 2021 Nissan Rogue Sport SV is 100 percent compatible with the Curt hitch you asked about, with the correct fit being the following part number: - Curt Trailer Hitch Receiver # C13377 The # C13377 doesn't actually use screws to install on your '21 Rogue Sport, they are Grade 8 bolts, along with the nuts and washers (all of which is included with the hitch); but yes, that is all that is needed in regards to hardware. It will bolt onto the frame and give you a 2 inch hitch with...
    view full answer...
  • Recommended Trailer Hitch For A 2022 Nissan Rogue Sport
    When it comes to installing a trailer hitch on your 2022 Nissan Rogue sport The etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2 inch # e79YR is confirmed to fit your vehicle. The trailer hitch has a bolt-on installation with no welding required. It has a matte black powder coat finish that is over a protective base coat that offers a superior rust resistance. The trailer hitch has a maximum gross trailer weight up to 3,500 pounds and has a maximum tongue...
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  • Hitch Receiver and Wiring Harness for a 2020 Nissan Rogue Sport
    For your 2020 Nissan Rogue Sport you are going to want the Curt Trailer Hitch Receiver item # C13377 this is a custom fit hitch that bolts directly to your Nissan with included hardware. I have linked an installation video and attached a photo so you can see what this hitch will look like when it is installed. You will also need a wiring harness to control your trailer's lights. I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector item # C33HR. To...
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  • Bolt On Trailer Hitch Receiver Confirmed to Fit a 2021 Nissan Rogue Sport
    The Curt Trailer Hitch Receiver # C13377 is confirmed to fit your 2021 Nissan Rogue Sport. While drilling is not required for the mounting holes you may have to enlarge the access holes to get the square hole spacers into the frame with the fish wires. The Curt T-Connector Vehicle Wiring Harness # C33HR will give you a 4-way flat connector. This is needed to connect to most small trailers that you may tow. It will also allow you to use Auxiliary Lights # C53201 with any hitch mounted accessory...
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  • Trailer Hitch Receiver Fit For 2022 Nissan Rogue Sport
    There are indeed trailer hitch receivers that fit your 2022 Nissan Rogue Sport; I went ahead and verified these fits directly with the manufacturers for you. The fits are the following: - Curt Trailer Hitch Receiver # C13377 - Draw-Tite Max-Frame Trailer Hitch Receiver # 76177 - etrailer Trailer Hitch Receiver # e79YR These hitches are very much the same, with the same installation and the same bumper and ground clearances, so I recommend going with whichever one is the best price. The...
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Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jacob T
Video Edited:
Jacob T
Employee Chris R
Video by:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Clayton O
Test Fit:
Clayton O
Employee Eric H
Written by:
Eric H

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