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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. 4 Flat
  4. Factory Tow Package
  5. Trailer Hitch Wiring
  6. Vehicle End Connector
THIS ITEM IS NOT A FIT FOR
2010 Chrysler PT Cruiser
CURT

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

Part Number: 56083
In Stock
$25.46
Retail:$34.95
You Save: 27%
Custom Fit Vehicle Wiring
Not Confirmed to Fit

2010 Chrysler PT Cruiser

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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package port - no cutting, splicing or tapping required. 1-800-940-8924 to order CURT custom fit vehicle wiring part number 56083 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 for Factory Tow Package - 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
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CURT Custom Fit Vehicle Wiring - 56083

Highlights

  • Quick and easy installation: Plugs directly into Lexus OEM tow package port with no cutting.
  • Custom-fit design: Tailored for specific models to ensure seamless integration.
  • Dust cap included: Protects the connector from dirt and debris buildup.
  • Compatibility versatility: Works with 4-pole, and adaptable with 5-7 pole (adapters sold separately).
  • Long-lasting protection: Includes a dust cap and grease recommendation to prevent corrosion.
  • No wiring hassle: Direct plug-in ensures easy access without needing additional tools.

Features to know about

Effortless Trailer Connection: No Cutting or Splicing Required

Installing a trailer connector can be daunting, especially when you're faced with a complex wiring job. With the Curt T-Connector Vehicle Wiring Harness, cutting, splicing, or tapping into your vehicle's wires is a thing of the past. Simply plug into the OEM tow package port located behind your rear bumper, and you're ready to hit the road with a reliable 4-way flat trailer connector.

Precision Custom Fit: Tailored for Your Vehicle

Struggling to find a wiring harness that fits perfectly with your factory setup? This Curt T-Connector is custom designed to integrate seamlessly with vehicles equipped with a factory tow package. It's made to ensure a precise fit, bringing peace of mind knowing that it aligns perfectly with your factory-installed systems without any hassle.

Versatile Compatibility: Adapts to Multiple Trailer Types

Whether you're hauling a small utility trailer or a larger camper, versatility is key. This harness isn't just limited to 4-way connectors; it works with 5-pole, 6-pole, and 7-pole adapters, covering a wide array of towing needs. Just plug what you need for your specific trailer and unleash the full towing potential of your vehicle.

Durable Long-term Performance: Dust Cap and Corrosion Resistance

Weather elements can wreak havoc on electrical connections, but not with this harness. It comes equipped with a dust cap that protects your 4-way flat connector, combined with a recommendation to use a little grease on connections to ward off corrosion. This ensures long-lasting, optimal performance regardless of how rough the roads or weather get.

Simple Access and Maintenance: Convenient Installation and Stowage

Say goodbye to tangled wires and unsightly installations. Once you've plugged in, the connector can be securely stowed beneath your vehicle, near the trailer hitch. The use of an optional mounting bracket ensures a tidy, damage-free setup. This thoughtful design keeps your wiring protected, accessible, and discreetly in place whenever you need it.

56083 CURT T-Connector - OE Replacement 4-Flat

Installation Details 56083 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.9

442 reviews
Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. Connector plugs directly into OEM tow package port - no cutting, splicing or tapping required.

by:
2010 Lexus RX-350

Plugged in & worked great...



by:

Easy to install



by:

Installed with no problems, thanks for the quick delivery, complete instructions and good looking product.



by:

I selected this wiring harness for my Lexus RX350 and it works great and it was super simple to install. If you’re looking for an installation project you’re going to look somewhere else, this took about 2 minutes to install and one of those was getting the packaging off. This fit into the wiring of my Lexus with no alterations, just plugged it in and routed the wire to the hitch.
Simple install, works great, I use it every few weeks to pull a small trailer. I’d buy it again



by:

Easy to plug and play if you have the towing package on your car. Loved that it came with zip ties and a plug cover.



by:
2022 Lexus RX 350

Perfect fit into the vehicle's existing wiring harness. Has about 4' of cord so it will ensure you have plenty of wiring for wherever you want to route it under the car.



by:
2013 Lexus RX 350

Very easy to install after watching your video. Just plug and play!



by:
2017 Lexus RX 350

Trailer wire harness was the exact fit. Well worth it. Videos were very helpful for both the wiring harness and the hitch. Thanks etrailer!



by:

Package arrived before the ink was dry on the credit card billing…??

Product was complete and undamaged…

Waiting for the shop to have a date to install it…

Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

7/2/2025

That's some speed! Are you going to be towing a trailer soon?

Gordon profile picture

Gordon

7/2/2025

@GwendolynY No, the hitch is for a Kust bike rack, i’ll be transporting two e-bikes!


by:

Connected perfectly to the factory connector that is already installed IF you have the tow package on a 2021 RX350



by:

A well made product. Some variables w/ the install as my Vehicle had a trim package that altered the advertised overall installation process. Overall very satisfied. Four hours to install on a 10 year old vehicle by a 69 year old male.
Thanks, Kirk



by:

Shipped to my door in less than 24 hours. 2010 RX350 wiring harness worked flawlessly. Plug and play. Very happy!



by:

Worked perfectly. Vastly better than a generic kit with quick splice connectors. Perfect fit to factory harness.



by:
2015 Lexus RX 350

Shipping was prompt and extremely well packaged. I received timely updates on the progress of my order (which was much appreciated as I needed this an upcoming trip). Both the recommended hitch and wiring harness were a perfect fit. The installation video and PDF were informative and accurate, making the installation stress free and within the estimated timeframe. One hint: if working alone, a floor jack to support the hitch works as well as another set of hands.

This was my second order from E-trailer. Their products and support are excellent.



by:
2022 Lexus RX 350

Great website, Good prices, really fast shipping!



by:

Quick shipping and delivery on a quality wiring. All that it needed was plugging it into the factory preparation. Made it very simple to install. Thanks a bunch.



by:

E-Trailer is the only place I shop for stuff like this - great prices, fast shipping and they always know what fits and what you need.



by:
2020 Lexus RX 350

plug and play. works great



by:
2019 Lexus RX 350

Worked perfectly with my 2019 Lexus RX3 50.



by:
2010 Lexus RX 450h

Literally cannot get simpler to install than this. Luckily, my 2010 Lexus Rx450H was set up with the factory tow package (and luckily I kept the window sticker to verify that!), so once the trim panel below the bumper is removed, the electrical connection is on the driver's side frame rail, capped. Remove cap, plug in the wiring harness, zip tie to the cross bar of the hitch, you're done. Shipping was super fast--ordered on Wednesday 6-14-17, scheduled for arrival 6-19-17, arrived late morning 6-17-17. Thank you!

I'm using it to tow troop equipment and canoe trailers for my son's Boy Scout events.



by:

Great product, excellent support. Very easy install in 25 minutes. Install directions very good. Holes are slotted in hitch, would recommend starting all bolts leaving bolts loose, then center hitch by bumping with wooden block before tightening. Then torque to spec.



by:
2015 Lexus RX 350

As easy as all the reviews said it would be. Took a little while to get new bolts started that replaced OE self-tapping bolts. But it all lined up and gave a professional finished look when completed. Now I'm ready to help my friend install the hitch on his wife's RX. Won't hesitate to recommend etrailer.com to all in the future.



by:

Great company and great products. Ordering was easy, shipping was fast and products were exactly as expected.



by:

The wiring worked out great! It was an exact fit for my car. This is really a great website with plenty of technical information for making a buying decision and plenty of videos to help support the installation process. After a year of you something zero problems.

Jerry profile picture

Jerry

11/10/2024

No Issues after 1 year



by:
2013 Lexus RX 350

All I can say is, thanks etrailer for having the right product for the Job!! Product as advertised! Installation was a breeze taking only 45 minutes. I did the installation without raising the vehicle up off the ground. As a side note, the Lexus dealer wanted over $700 for doing the same job, no surprise there..


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Show More Reviews

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

  • Location Of Curt Wiring Harness Connections For a 2021 Lexus RX 350L Without Tow Package
    For the Curt T-Connector Vehicle Wiring Harness # C56217 on your 2021 Lexus RX 350L the connectors will be located in a different spot. The 10 pin connector should be located on the passenger side just below the taillight. The 4 pin connector will be underneath the drivers side bumper cover. It may require you to use the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package # 56083 to make that connection. The video that I linked below will help you find the 4-pin connector.
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Trailer Wiring for 2014 Lexus RX350 Without Factory Tow Package
    Both the 2012 and 2014 model years of the Lexus RX 350 are part of the vehicle's third generation, spanning 2008 through 2015 model years. Despite this, wiring harness fits are not shared. My contact at Tow Ready suggested you check for a wiring connector right behind the rear bumper. Even though you do not have the tow package this connector may still be there. (Exactly what is included in a tow package can vary from year to year and model to model.) If so you can use # 56083 from Curt....
    view full answer...
  • Looking For A 7 Pole Plug And Play Wiring Harness For A 2012 Lexus RX 350
    Hey Mark, For your 2012 Lexus RX 350 there are not any 7 pole plug and play options, but what you could do is use a plug and play 4 flat harness with a 4 flat to 7 pole adapter. The plug and play harness for your vehicle depends on if you have a factory tow package or not. If your vehicle does have a factory tow package you will want to go with # 56083, Curt T-Connector Vehicle Wiring Harness. If it turns out you do not have a factory tow package you would want to go with # 118478, T-One...
    view full answer...
  • Parts Needed to Install 7-Way and Brake Controller on 2018 Lexus RX 450h
    Hey Jeff, we can help install a 7-way on your 2018 Lexus RX 450h but you will have to start with a 4-way like the part # 56083 as there isn't a 7-way kit custom fit for your vehicle. So once you have the 4-way installed you would need to convert it to a 7-way with the part # 37185. Unless your trailer has brakes then you would also need a brake controller like the p2 part # 90885 and the 7-way adapter part # ETBC7 instead.
    view full answer...
  • Recommended Wiring Harness for a 2013 Lexus RX 350
    Hey Jim, thanks for the information. However, I can not do anything with that VIN number so I went ahead and deleted it. There's two options for trailer wiring that fit the 2013 Lexus RX 350. The Curt T-Connector Vehicle Wiring Harness item # 56083 is designed for the models that have the factory tow package. If you have the tow package there's going to be a plastic plug underneath the right rear of your SUV by the bumper. I linked a video below that shows this location at the 30 second...
    view full answer...
  • Troubleshooting 2015 Lexus RX 350 Curt T-Connector Not Matching up with OEM Plug
    Hey Neil, thanks for reaching out! It looks like you still have the dummy plug connected to your 2015 Lexus RX 350 to help protect the OEM connector. If you remove the one end of the plug (that you're holding onto) you'll be able to plug in the Curt T-Connector # 56083 just fine. If you jump to the 1:20 minute mark on the attached video you'll see Randy remove that dummy plug (although it isn't highlighted like I'd like it to be). How are you planning on securing the 4-Way to your hitch...
    view full answer...
  • Recommended Trailer Hitch for a 2022 Lexus RX 350
    Yes, the Draw-Tite Trailer Hitch item # DT58GR does fit the 2022 Lexus RX350s. This hitch is custom fit and bolts directly to your RX 350 with included hardware. I have linked a picture and an installation video below so you can follow along with the process and see what the final look will be. If you need a wiring harness you will Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector item # 56083. This custom-fit T-connector plugs into your vehicle's...
    view full answer...
    Image 1 for
  • Trailer Hitch Receiver Compatibility With Rear Lift Gate Kick Sensor On a 2022 Lexus RX 350 F-Sport
    The Draw-Tite Max-Frame Trailer Hitch Receiver # 75540 has been successfully installed on other 2022 Lexus RX 350 F-Sports with the kick sensor for the rear lift gate. Do note that the receiver tube will limit the range and function of the kick sensor and you may no longer be able to use the function. With the Hidden Hitch by Draw-Tite Trailer Hitch Receiver # DT58GR it allows you to remove the receiver tube when not needed. Since there will not be a receiver tube there is nothing to block...
    view full answer...
  • Trailer Wiring that Fits 2023 Lexus RX 350
    For your 2023 Lexus RX 350 we have the # 119190KIT for if you do not have the tow package (this is a universal style wiring kit), or we have the # 56083 for if the vehicle does have the factory tow package. This plugs in easily and does not require any splicing unlike the # 119190KIT.
    view full answer...
  • Hitch And Wiring Harness Recommendation For My 2022 Lexus RX 350
    The hitch receiver that I recommend is the Curt Trailer Hitch Receiver - Custom Fit - Class III - 2" # C73DR. This hitch receiver has a maximum tongue weight of 525 lbs and a maximum gross trailer weight of 3,500 lbs. or 4000 when using a weight distribution system. Next, you will need a wiring harness for your vehicle. You did not indicate if you have a factory tow package, so I will provide you with recommendations for both options. You can check to see if you have the factory tow package...
    view full answer...
  • Recommended Hitch for a 2020 Lexus RX350 F Sport
    The only hitch that will work with your 2020 Lexus RX350 F Sport is the Draw-Tite Trailer Hitch item # 75540. This hitch is custom fit and bolts to your Lexus with included hardware. This is a class III hitch with a 2" receiver. It has a 4,500 lbs towing capacity, and a 675 lbs maximum tongue weight. It is not rated to be used with a weight distribution system. I have linked an installation video below so you can see how to get this hitch set up. If you are planning on towing you will...
    view full answer...
  • Troubleshooting Curt Vehicle Wiring Harness 56083 On 2021 Lexus RX 350 Not Having Power
    The Curt T-Connector Vehicle Wiring Harness for Factory Tow Package # 56083 requires your 2021 Lexus RX 350 to have the factory tow package which includes a factory installed module to power the trailer lights. Since your harness does not have power I recommend checking that there is a module plugged into the 10 pin connector which may be inside the luggage compartment, on the passenger side below taillight, behind little plastic removable bin. If no module is plugged in you will need...
    view full answer...
  • Correct Trailer Wiring For My 2010 Lexus RX350 With Factory Tow Package
    There is a possibility of 2 different problems. The first is that if you have the front wheel drive model RX350 and the factory tow package, then the Curt Custom Fit Vehicle Wiring, part # 56083 is not compatible with your 2010 Lexus RX350. The other possibility is that the plug that you found on your 2010 Lexus RX350 still has the protective cover on the plug. If this is the case, you will just need to remove the protective cover and part # 56083 will plug right in. If you have a front...
    view full answer...
    Image 1 for
  • Can The Bumper Fascia On a 2022 Lexus RX 350 Be Trimmed With a Razor Blade?
    It is very difficult and dangerous to try to trim the fascia on your 2022 Lexus RX 350 using a razor blade when you install the Draw-Tite Max-Frame Trailer Hitch Receiver # 75540. Since you have to trim the rear fascia as well as a couple panels under your Lexus to install the receiver you have a couple options. First you can take your Lexus to a service center before you install the receiver to have the panels trimmed per the manufacturer instructions that are linked below. You can also...
    view full answer...
  • Does the Draw-Tite Hitch 75540 Fit the F-Sport Model of the 2019 Lexus RX 350?
    Yes it does. Our website can be fun sometimes. I can confirm that the Draw-Tite Trailer Hitch item # 75540 does fit the 2019 Lexus RX 350 including the F Sport model. I have linked an installation video below so you can see how to get it set up. If you are planning on towing you will also need a wiring harness item # 56083 for the Lexus's with the factory tow package or item # 119250KIT for the vehicle's without the tow package and a ball mount kit item # C45534.
    view full answer...
  • Do You Have a Hitch for a 2021 Lexus RX 350 F-Sport?
    Yes, we do! The Hidden Hitch by Draw-Tite Hitch item # DT58GR you were looking at actually fits both the F-Sport and standard model of the 2021 Lexus RX 350. This hitch is custom fit and bolts to your Lexus with included hardware. I really like this hitch because the 2" receiver is detachable and the crossbar installs behind your rear bumper. This means you won't be able to see it when you're not towing or using the receiver for an accessory. If you are planning on towing you will also...
    view full answer...
  • Trailer Lights Not Working After Installing Wiring Harness on a 2015 Lexus RX 350
    First, the trailer wiring harness # 56083 is only a fit if your 2015 Lexus RX 350 came with the factory tow package. If it did not then that could be why it isn't working. Or, if it does have the factory tow package, it could be a missing fuse or relay which you could find in the under hood fuse panel or the in cab fuse panel.
    view full answer...
  • Recommended Hitch for a 2022 Lexus RX 350
    Yes, we do have a trailer hitch for your 2022 Lexus RX 350. It is the Hidden Hitch by Draw-Tite item # DT58GR. This hitch is custom fit and bolts directly to your Lexus with included hardware. The reason I like this hitch is that the 2" x 2" receiver is completely removable. When you're not towing or using an accessory you won't be able to tell your Lexus has a hitch. The crosstube attaches behind the rear bumper and the receiver attaches behind the bumper as well. To tow with this hitch...
    view full answer...
  • No Power To Trailer Connector After Installing On 2016 Lexus RX 350
    I called my contact at Curt and asked about the installation of the wiring harness, part # 56083 on your RX 350. First you can call the dealership with the VIN and ask if it has a tow package. If so ask them where the fuses or relays may be. I did some research and was unable to find the relay or fuse location for towing. PTW2993. Turn on the headlights and use the turn signals to make sure you are getting a signal. If you do not show any power on that port, chances are the vehicle...
    view full answer...
  • Trailer Wiring for 2020 Lexus RX350 That Doesn't have OEM Tow Package
    Hey Shane, for your 2020 Lexus RX 350 that didn't have a factory hitch the trailer wiring that you honestly should have gone with is the part # C56217 which is for the versions of the vehicle that don't have the tow package. While your vehicle has the connector it's not active which is why it's not working as-is. Maybe Lexus dealer could activate the wiring harness but we don't have any info on that.
    view full answer...
  • Trailer Wiring Harness for a 2016 Lexus RX 350 without Factory Tow Package
    All of the wiring harnesses currently available for the 2016 Lexus RX 350 require that the vehicle have the factory tow package but there is an alternative. You could use a universal wiring harness # 119250KIT. This harness has clamp connectors that clamp around the vehicle tail light wiring and sense the current passing through them. This means you will not have to cut and splice into the vehicle wiring! This harness does require a connection to the vehicle battery. I have linked a help...
    view full answer...
  • Trailer Hitch Recommendation for a 2016 Lexus RX 350 Sport
    I checked with Curt and the Curt hitch part # C13272 does not have any fit exclusions for Sport models so it would fit your 2016 Lexus RX 350 Sport and work well. If you wanted to do some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one with a 3/4 inch rise or 2 inch drop and one with a 2-3/4 inch rise or 4 inch drop. It also includes a 1-7/8 inch ball, 2 inch ball, hitch pin with clip, and a storage bag. If the ball mount kit does not...
    view full answer...
  • Trailer Wiring Harness Recommendation for 2017 Lexus RX 350 with Towing Package
    For a 4-way trailer wiring harness for your 2017 Lexus RX350 that has the tow package you would want the part # 56083 which is a confirmed fit. This harness does not have a converter box built into it and it just plugs right into a port you have at the rear of your vehicle. I attached an install video for more info for you to check out as well.
    view full answer...
    Image 1 for
  • Best Trailer Hitch Recommendation for a 2013 Lexus RX 350
    All of the hitches available for your 2013 Lexus RX 350 are pretty similar. The biggest difference is that the Curt Hitch part # C13143 can fit the F Sport and non-F Sport models. Because of that I would recommend the Curt hitch. The trailer wiring available for your vehicle, part # 56083, is only available for the models of the vehicle that have the factory tow package. Without the factory tow package use # 118255. I attached videos for you to check out as well.
    view full answer...


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