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  1. Custom Fit Vehicle Wiring
  2. CURT
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. No Converter
Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector

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

Item # 56083
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Custom Fit Vehicle Wiring

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CURT Trailer Hitch Wiring - 56083
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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. Call 800-298-1624 to order CURT custom fit vehicle wiring part number 56083 or order online at etrailer.com. Free expert support on all CURT products. Guaranteed Lowest Price 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

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • No Converter
  • CURT

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.


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Designed for use with a factory tow package
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing of wires
    • Locate connection point behind rear bumper
    • Plug in connector
  • Comes with dust cap for 4-way flat connector
  • Limited 1-year warranty


Installation

This custom-fit T-connector plugs into your vehicle's factory tow package wiring harness, which is located behind the rear bumper, along the driver's-side frame rail.


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 plug on your automobile and the 4-pole connector itself - to help prevent corrosion.



56083 CURT T-Connector - OE Replacement 4-Flat

Installation Details 56083 Installation instructions

This Product Fits The Following Vehicles



California residents: click here



Customer Reviews

Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector - 56083

Average Customer Rating:  4.9 out of 5 stars   (299 Customer 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.

- 56083
by:

The product is probably fine but I needed an electronic converter for my vehicle since it didn't have the trailer wiring from the factory. This was not clear from the eTrailer description.


Comments
When entering the year, make, and model of the vehicle and then ing trailer wiring harness there is a down menu asking if the vehicle has a factory tow package or does not have one. For a 2015 Lexus RX 450h without a factory tow package you will want part # 118255
T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
$49.94
.
-- Etrailer Expert Jenny N - 03/04/2022


- 56083
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.



- 56083
by:
2021 Lexus RX 350

WOW. Fast shipping and packaged well. Great video to assist if needed. I made a call to verify that it fit my car. Very quick phone pick-up. Very pleasant and helpful. The hitch is barely noticeable. I give this place a 10.



- 56083
by:

Easy fit. 2022 Lexus connector plug is on the driver side underneath the rear bumper.



- 56083
by:

Good instruction set made installation straightforward.



- 56083
by:
2013 Lexus RX 350

Super easy to install especially if you have the tow prep package on your car. The bracket makes the look more professional.



- 56083
by:

It works more than i can say for their trailer hitch


Comments
Ok
Ray - 01/28/2022


- 56083
by:

Hitch and cable as advertised, good fit. Installation video helpful. I wanted to keep the tie down brackets which use 2 of same 3 bolts, so I had to cut the tabs off the brackets to get them to fit inside the hitch mounts. The ball mount I bought rattled horribly in the receiver so I had to wrap tape around it. I absolutely HATE being inundated with eTrailer ads AFTER I've made the purchase. Extremely annoying. Waste of your money.



- 56083
by:

Process was made easy from the beginning thanks to Teri answering all my questions and concerns. Once again Thank you Teri



- 56083
by:
Lexus RX 350

I purchased this harness a year ago and installed it with relative ease. The wire had plenty of length for my vehicle (Lexus RX 350) and the connection was simple. The product works very well, I am satisfied and would recommend to others with a similar need.



- 56083
by:

Excellent selection of hitches and accessories. Very prompt service and follow-up when customers like me who order the wrong parts! Highly recomment etrailer.



- 56083
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.



- 56083
by:

Perfect fit for application. The 4-way plug cap lanyard seems a bit short maybe it will stretch with use.



- 56083
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.



- 56083
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.



- 56083
by:

Perfect fitment and function as adverti sed.



- 56083
by:

Fits perfectly ... installed in less than an hour with a second set of hands from my son. And the genesis that snapped right in to the prewired rx350 tow wiring package .... all at 1/3 of the price the Lexus dealer was going to charge !!



- 56083
by:

Fits perfect, easy to use instructions



- 56083
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..



- 56083
by:

Wiring harness was received promptly and works as it should. Price was very competitive.



- 56083
by:

Trailer hitch and wiring harness fit perfectly. I was impressed that your representive, Gwen, knew exactly what I needed and did not need. She had my order shipped the day of the order and it arrived on schelude in 3 days. Thanks



- 56083
by:

Products in stock permitting a prompt delivery. Best pricing too.



- 56083
by:

Very quick shipping and installed in just over an hour. Instructions are very easy to follow.



- 56083
by:
Lexus RX 350

Wire harness fits perfectly and is easy to install on my RX 350. However if you are new to adding a tow option to this vehicle you have to purchase a module from the dealership in order for the trailer lights to work. Its around $100 and involves removing some of the rear interior panels to install. It does not come with any directions but if you look closely behind the passenger side rear panel there is a place designed for it to be mounted. Other than that it works great.



- 56083
by:

Great product, price, and support. I highly recommend etrailer.


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Show More Reviews

Ask the Experts about this CURT Custom Fit Vehicle Wiring



  • Troubleshooting Malfunctioning Trailer Wiring Harness on 2013 Lexus RX350
    I'm assuming you have a 2013 Lexus RX350. Did the # 56083 wiring harness ever work, or did it work for awhile and then stop? From my research, the connector should work once plugged into the factory towing connector under the vehicle, unless your vehicle isn't equipped with the tow package. If the tow package wasn't purchased, you'll need to add the fuses or relays to activate the tow package. I'd recommend you check your owner's manual or with Lexus, as I was unable to access an online...
    view full answer...
  • Troubleshooting No Power to 4-Way on 2014 Lexus RX 350 After Curt Harness 56083 Install
    The only way to know for certain is to contact at Lexus dealer with your VIN to determine if you have the tow package. Sounds like you are missing some relays or fuses under the hood of your 2014 Lexus RX 350 that will allow the trailer wiring harness to be active. There is a tech note for this harness that it may require additional components such as relays or fuses depending on how the vehicle is equipped.
    view full answer...
  • Will the Curt Trailer Wiring Harness 56083 Fit a 2016 Lexus RX 350 without Tow Package
    If you tested the port on your 2016 Lexus RX 350 for trailer wiring and the pins have voltage then the Curt Harness part # 56083 will fit and work well. We have found that there are several vehicles that even if they do not have the tow package the wiring is still ran and functional. I attached an install video for this harness for you to check out as well.
    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...
  • Will Trailer Wiring harness 56083 Fit a 2013 Lexus RX 350 without Factory Tow Package
    Curt trailer wiring harness # 56083 is designed to fit a 2013 Lexus RX 350 that came with the factory tow package. The dealer is likely correct, additional parts could possibly be needed to activate the tow package wiring. You could try to place a fuse and that may be all it needs. Its certainly worth trying. All you have to do is check the fuse panel lids (there is usually one in the cab of the vehicle and another under the hood or possibly in the cargo area of the vehicle) for the tow...
    view full answer...
  • Curt T-Connector Vehicle Wiring Harness w/ 4 Pole Connector, part # 56083
    Yes, the Curt T-Connector Vehicle Wiring Harness with 4-Pole Connector, part # 56083, comes with installation instructions for your 2010 Lexus RX350. This wiring harness simply plugs into the factory connectors on your Lexus.
    view full answer...
  • How to Install T-Connector on 2010 Lexus RX350
    Part # 56083 is called a T-connector because it connects into wires that run between the tail-lights. The connection point on the vehicle will only work if your 2010 Lexus RX350 came with the factory tow-package.
    view full answer...
  • Location of Trailer Tow Package Connector on 2015 Lexus RX350
    The connector that the Curt # 56083 trailer wiring harness plugs into is located right behind the bumper on the driver's side rear corner of the vehicle as shown in the linked video and in the provided photo. There might be a underside cover that needs to be removed to access the connector as shown in the video.
    view full answer...
  • 2015 Lexus RX 350 Trailer Hitch and Wiring Fit Recommendation
    The Curt hitch part # C13143 is a confirmed fit for your 2012 Lexus 450h. This will be a great choice for a hitch. For the amount of salt you are going to get in the winter in Wisconsin there really is no way to totally stop all rust. But what you can do is make sure to spray off the salt as often as possible on the hitch, and if you see a scratch in the paint of the hitch use spray paint to paint over it before rust develops. Also if you find rust try to sand it off as quick as possible...
    view full answer...
  • Trailer Wiring Harness for a 2017 Lexus RX 350 with Towing Prep Package
    The trailer wiring harness for the 2017 Lexus RX 350 is # 56083. It actually fits several years of the RX 350 including the 2017. I have linked a video showing an example installation for you.
    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
  • Recommended Trailer Wiring Harness for 2022 Lexus RX 350 with Factory Tow Package
    The Curt T-Connector Vehicle Wiring Harness part # 56083 is correct for a 2022 Lexus RX 350 with factory tow package. It's a plug-in harness that does not require any splicing for installation. The plug you will need to locate to use this harness is located behind the rear bumper cover on the driver side. It provides a 4-way flat which is the most common type of connector and used on most trailers for this vehicle. I have attached an install video below on an earlier model but it will...
    view full answer...
  • Where Does Curt Trailer Wiring Harness Install on a 2005 Buick Terraza
    For your 2005 Buick Terraza if you are using Curt harness # 56077 the connection points on the vehicle are located behind the driver side tail light. I have included a link to the right to the installation instructions. I have also included a picture that shows the location.
    view full answer...
    Image 1 for
  • Trailer Wiring Harness Installation Location on a 2010 Lexus RX 350 with Factory Tow Package
    The connection point for trailer wiring harness # 56083 is located behind the rear bumper, on the driver side. I have included a picture and a link to the instructions that show this for you. That connection point may be there even if the vehicle does not have the factory tow package. The easiest way to determine how the vehicle is equipped is to call a dealer service department and have them run the VIN through their system. They can tell you if you have the tow package or not. If you...
    view full answer...
    Image 1 for
  • Where to Plug in the 2011 RX 350 Trailer Hitch Wiring Harness # 56083
    Yes, I have a photo that shows where to plug in the Curt Custom Fit Vehicle Wiring, item # 56083, on your 2011 Lexus RX350. The photo to the right shows the connector with the cap that is installed from the factory. Once the cap is removed, you will carefully plug in the connector from the wiring harness. I have also included a link to instructions for you to view.
    view full answer...
    Image 1 for
  • No Lights On Trailer When Using Curt Wiring Harness # 56083 On 2010 Lexus RX350 Without Tow Package
    On your 2010 Lexus RX350 without a tow package, you would need to use Tow Ready Custom Fit Vehicle Wiring, # 118478. I have included a link to the installation details below. This harness includes a circuit protected converter and requires a direct connection to the battery. This connection to the battery virtually eliminates power draw from the vehicles taillights, which protects the sensitive wiring. The Curt T-Connector Vehicle Wiring Harness with 4 Pole Connector, part # 56083 is for...
    view full answer...
  • Availability of a Trailer Wiring Harness for a FWD 2010 Lexus RX 350
    Yes, we have seen this situation, from the research I have done the FWD model of the 2010 Lexus RX350 does not come with tow package wiring that can be utilized with the Curt # 56083 wiring, unless the vehicle has this wiring from the factory. So for the FWD vehicle this is a replacement part only. For your FWD model without the wiring harness from the factory, you will need the Tow Ready Custom Fit Vehicle Wiring, item # 118478, to set your vehicle up with a 4-Way trailer wiring connector....
    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
  • Trailer Wiring Harness for a 2010 Lexus RX 350 without Factory Tow Package
    If you did not order the tow package for your 2010 Lexus RX 350, then you will need to use wiring harness # 118478. The connection point for the tow package harness may be present but there are other components and wiring that needs to be done to make it fully functional from the factory. You can always have a dealership run the VIN of the vehicle to determine what options it has. I have included a link to the installation details for the 118478 wiring harness for you to view. I have...
    view full answer...
  • Troubleshooting Installation of Curt T-Connector Vehicle Wiring Harness # 56083 on 2012 Lexus RX 350
    It sounds to me like your 2012 Lexus RX 350 may not be equipped with an active tow package. The plug may be there but the necessary connections may be missing. I recommend checking with your local Lexus dealer to determine what is needed to activate the towing package. Another option would be to go with the T-One Vehicle Wiring Harness, # 118478. The T-One connector plugs directly into the existing wiring at the back of your taillights. Just make your ground connection, route the power...
    view full answer...
  • Troubleshooting Installation of Curt T-Connector Vehicle Wiring Harness on 2012 Lexus RX 350
    One possibility is that your 2012 Lexus RX 350 may not be equipped with an active tow package. The plug may be there but the necessary connections may be missing. I recommend checking with your local Lexus dealer to determine what is needed to activate the towing package. Some vehicles will need to be reprogrammed at a dealership to allow this wiring harness to work.
    view full answer...
  • Troubleshooting Trailer Wiring Connection on 2015 Lexux RX450h
    For your 2015 Lexus RX 450h the Curt T-Connector # 56083 should not need a fuse in the trailer battery slot. You should instead only need fuses in location #21 in the cabin fuse box to power the trailer tail light converter and #44 in the under hood fuse box to power your trailer lights. If you check those fuses and still have no power to your trailer connector then your converter is likely bad and you'll want to use # 118255 which comes with the plug and converter.
    view full answer...
  • Wiring Harness for a 2015 Lexus RX 350
    For a 2015 Lexus RX 350 with the towing package, you would want to use the Curt T-Connector Vehicle Wiring Harness # 56083. This harness is a simple plug-in which will give you a 4-way connector at the rear of the vehicle. If you are going to be towing, I recommend checking out Ball Mount Kit # 989900, which will fulfill your towing needs in one tidy package; a pair of ball mounts to give you the appropriate rise or drop, a 1-7/8” ball, a 2” ball and a pin and clip. I've attached a link...
    view full answer...
  • Troubleshooting 4-Pole Wiring Harness Installation in 2011 Lexus RX 350
    Curt 4-pole wiring harness # 56083, which fits your factory-tow-package-equipped 2011 Lexus RX 350, uses a square OEM connector to join the car's wiring. If your fuse is good then there may be a corrosion problem within the connectors. Disconnect the harness and check all contacts for signs of discoloration (even slight green or white discoloration can indicate corrosion that could cause a problem). Clean contacts as needed with a spray-on electrical contact cleaner. Since your fuse is...
    view full answer...


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