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Curt Upgraded Circuit Protected Powered Tail Light Converter w Hardwire Kit and Tester - 4-Pole Flat

Curt Upgraded Circuit Protected Powered Tail Light Converter w Hardwire Kit and Tester - 4-Pole Flat

Item # C59496
Our Price: $150.98
Trailer Wiring

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Shipping Weight: 1.74 lbs
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Great Prices for the best trailer wiring from CURT. Curt Upgraded Circuit Protected Powered Tail Light Converter w Hardwire Kit and Tester - 4-Pole Flat part number C59496 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (93)
  • Q & A (0)
  • Photos

CURT Trailer Wiring - C59496

  • Trailer Connectors
  • Vehicle End Connector
  • 4 Flat
  • Plug and Lead
  • 0 - 5 Feet Long
  • CURT


  • Adapts separate turn and stop lights (3-wire system) to a (2-wire system) on trailer
  • Works with domestic and import vehicles
  • Virtually eliminates draw on vehicle tail light circuit
  • Potted enclosure resists water and vibration
  • Protects against overvolt, ESD, and short-circuits
  • No HD flasher required
  • Battery powered and circuit protected
  • Surface Mount Technology (SMT)
  • Does work with vehicles that have LED tail lights
    • Will work with trailers that have LED tail lights
  • Includes a powered converter wiring kit, a circuit tester, and (4) Quick splices to aid in installation
    • Also includes 4-pole trailer connector cover
  • One-Year Limited Warranty


  • Pigtail length: 17" long
  • 4-Pole trailer connector length: 58" long from converter box
  • Amperage allowance:
    • 3.0 amps per turn/brake
    • 6.0 amps for taillight function

Warning: Overloading circuit can cause fires. Do not exceed product rating or tow vehicle's lamp load rating, whichever is lower. Read vehicle owner's manual and instruction sheet for additional information.

Surface Mount Technology (SMT) is a method for constructing electrical circuits where components are mounted onto the surface of printed circuit boards.

56496 Curt Circuit Protected Powered Converter w/ SMT

55151 Powered Converter Wiring Kit

48705 Circuit Tester

Replaces 56146KIT

Installation Details C59496 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Curt Upgraded Circuit Protected Powered Tail Light Converter w Hardwire Kit and Tester - 4-Pole Flat - C59496

Average Customer Rating:  4.6 out of 5 stars   (93 Customer Reviews)

2005 Volvo XC70

I installed this in about 1 hour mostly reading and discovering which wires to use. I went and tested on a standard trailer and all the lights work as expected. With the battery in the back of the Volvo xc70 2005 I didn't have to run the wire to the front so it was even easier to install than most vehicles

Its been on a year now and I love the ability to pull a 4x8 trailer with my xc70.
Matthew - 05/07/2023


Easy plug and play install. Replaced old version that had a fried converter.

Second time buying from Etrailer, will buy again if necessary. Came in a timely manner.

Still in good shape no issues
Ben - 05/30/2023


Product was great! Fit perfectly on my 2022 Kia Sorento Hybrid S Model. I worked at a dealership so I got the hook-up for installation but the product and the service are unmatched at etrailer.


I have an older but well maintained Class A RV. I wanted to tow with lights but found out my turn signals were not the same as my brake lights. etrailer had the solution for my problem. Been on 2 cross country trips with the lights module and everything works great !


"Plug and play" towed multiple trailers with no lighting issues very happy with the product.

2021 Ford Bronco Sport

Mounted the receiver yesterday. Receiver is very well built. Instructions could have been better. Instructions are clear on where to trim the bumper cover but do not mention modifying the heat shield that is behind it.
Overall a good fit and a well made product.

2004 Mercedes-Benz SLK-Class

Very happy with the trailer hitch and 4-way tail light converter for my 2004 Mercedes SLK 320. I never thought anyone would make one for a sports car, but etrailer does and it works perfectly. I found the etrailer hitch on the "SLK World" website, where other SLK owners have also installed it, and would recommend going there if you have an SLK.


works great!
plug and play!


Not looking forward to the wiring installation, but the instructions look very good. Curt makes a really great hitch.


Looks to be of high quality

Steve - 07/12/2023

2016 Volkswagen Jetta

Got this for a 2016 Jetta. Instructions say to run this outside and under the car, but found it easier to run up the left side in the interior, tucking under the trim pieces and through the steering boot to the fuse box. Works great!


Functional piece of equipment. Was easy to install.


Worked as advertised and easy to install


On my cmax it was easy to put to geather. On the cmax the battery is in the back.


Great looking product can't wait for in stallation


Works well - installation isn't hard after you figure out where to mount the unit and identify which wires in the vehicle harness are needed to attach the converter.

The tester probe is pretty much useless as it's hard to see. I ended using my own test tools (multimeter) to confirm its operation.

Rather than drill holes in the vehicle. I keep the harness inside the vehicle and pull it out when needed.

2008 Lincoln Town Car

The trailer lighter converter doesn't seem to work the brake lights after installation. I will be contacting customer service about this issue.

Before you test the harness with a circuit tester like item # PTW2992
LCD Digital Circuit Tester
can you please remove the fuse on the power wire for 30 minutes, then reinstall it. This fuse should be located close to the vehicle battery in a fuse box. If the powered converter box has engaged its circuit protection feature, this will reset the box unless it was overloaded and it was damaged.
-- Etrailer Expert Sierra K - 05/04/2022
I wish to apologize thinking there was an issue with the converter when there wasnt, the next day I did a check and because I infact thought I needed to connect the brake red wire directly to the brake switch and not the multi-purpose red and green wire on my 08 Lincoln. It works great when you wire it correctly.
-- comment by: Steven - 05/04/2022

2007 Volvo S60

The prompt feedback via email on the despatch of the order and links provided to track the progress was excellent and built confidence in the administration of the process. Great clarity by just clicking on the link.
I ordered two products and both came on day three as ordered. I had a tight window for delivery in time and was worried but it was unfounded. Clearly the company has it's administration, communication and operation under control by competent people. And using a reliable supply channel.
I can only say...thank you and BRAVO.

2004 Dodge Sprinter

converter and flat 4 wiring was fine. for my application, the green RH turn signal wire was over 2 feet too short to cross from one tail light to the other. really, add 3 ft to the wire, much less hassle. the power wire from battery to converter is ALSO TOO SHORT, by more than 5 feet. Since that part of the kit is really only the fuse holder and the wire, this was a waste of money. NOT AT ALL WHAT I WOULD CALL A UNIVERSAL FIT.

This wiring harness part C59496 is considered a universal fit because it is not a plug and play custom fit application. It can be hardwired into many different vehicles. If you needed extra wire for your vehicle, I recommend part # DW02412-1
14 Gauge Primary Wire - Yellow - per Foot
for extra 14 gauge wire.
-- Etrailer Expert Heather A - 10/27/2018


Used this to remedy a bad Dodge ECM module that quit sending brake light signals thru the 7-way plug. Did some cutting and splicing of wires and went "old school" by connecting directly to tail-lights, then back through 7-way. Has worked flawlessly for over 2 seasons now!

2017 Mercury Tracer

Contains all you need to make this work. Used it on my 2017 GLE350 that has LED tail lights using combined brake and signal lights. Figuring out the correct wires to connect to was a bit trial and error. Running the wire from the module to the fuse box below the rear passenger seat took some time as well. But the setup works without a problem.
Brake (red): connect to ground.
Lights (brown): right tail light, white with blue tracer.
Right turn: right tail light, gray/black wire
Left turn: left tail light, gray/black wire.
Ground: at rear of the car, between tail light and spare wheel well.
12V power: below rear passenger seat, using the big screw connector/cable visible there.

Good luck!


The Curt trailer hitch has been perfect- i also purchased the light system to connect to the trailer - it took me a whole day to install and i am thankful for the detailed videos for the hitch and lights. I only got help with the hitch when lifting it into position as i do not have a hitch jack. I think the hitch is top quality and I am confident to pull anything-


Looks great and I’ll have more to comment on after it’s installed.

2014 BMW X1

Really incredible service!

2005 Lincoln Town Car

Easy install, fits well and works great

Show More Reviews

See what our Experts say about this CURT Trailer Wiring

  • Trailer Wiring Harness for a 2019 Hyundai Tucson Ultimate
    The trailer wiring harness I recommend for your 2019 Hyundai Tucson Ultimate is the Curt Upgraded Circuit Protected Powered Tail Light Converter part # C59496. This kit will work with LED tail lights so you should not have any concerns. It will splice into the tail light circuits on your vehicle and provide you with functions for a 4-way trailer connector. It also comes with all of the wiring connectors you will need as well. Unfortunately, there are no custom fit trailer wiring harnesses...
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  • Should Red Wire of Curt Universal Wiring Kit be Grounded for Jeep JL with 3-Wire System
    If your Jeep JL has a 3-wire system then you will actually attach the red wire from the Curt Upgraded Circuit Protected Powered Tail Light Converter w Hardwire Kit # C59496 to the brake light circuit. The only time you will ground the red wire is if your Jeep JL is a 2-wire system. You can tell the difference by checking to see if the same circuits are used for both your stop and turn functions. If they do then it's a 2-wire system but if they don't it's a 3-wire system. This wiring kit...
    view full answer...
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  • Will the Curt C59496 Also Work On Trailers with Incandescent Lights
    Yes. The Curt # C59496 will provide enough power for incandescent lights on a trailer without issues and is a confirmed fit on your 2015 Chevy Camaro.
    view full answer...
  • Installation of Wiring Harness on 2019 Hyundai Tucson
    The Curt Upgraded Circuit Protected Powered Tail Light Converter # C59496 will splice into the wiring behind the tail lights on your 2019 Hyundai Tucson. You'll likely need to open the rear hatch of your Tucson to access the area behind the tail lights; there should be some screws that allow you to remove the tail light housing and access the wires you need to splice into. You will also need to run the included heavy gauge wire to the battery and connect via the included ring terminal....
    view full answer...
  • Does 2006 Lincoln Town Car Need Trailer Wiring Harness with Power Ran From Battery
    Not all vehicles can handle the additional amperage draw of the trailer taillights on the vehicle taillight circuits. Those vehicles need setup that draws power from the battery. Some vehicles have higher rated circuits that can handle this, and others need to have the power drawn straight from the battery to protect the taillight circuits. For your 2006 Lincoln Town Car you need to install a harness that draws power from the battery to protect the taillight circuits. For that you would...
    view full answer...
  • Best Trailer Wiring Harness for a 2006 Nissan Altima
    The Curt Upgraded Circuit Protected Powered Tail Light Converter w Hardwire Kit and Tester - 4-Pole Flat # C59496 is a confirmed fit for your 2006 Nissan Altima. I have attached a sample installation video as well as the installation details for you to check out. The cost is found on the product page.
    view full answer...
  • How To Install Trailer Wiring Harness on 2014 BMW X1
    The 2014 BMW X1 uses a multiplexed wiring system which means either the vehicle’s brake and tail functions are combined on one wire and the turn functions are on separate wires or the vehicle’s brake, tail and turn functions are combined on one wire. In order to determine which you have you will need to test for this with a circuit tester. Therefore, when installing a trailer wring harness like the Curt Upgraded Circuit Protected Powered Tail Light Converter part # C59496 you'd not connect...
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  • Trailer Wiring Harness Recommendation for a 2013 VW Jetta TDI Sportwagen
    For your 2013 Volkswagen Jetta SportWagen I recommend the Curt Wiring Harness part # C59496. This harness would work very well for you. I attached an install video for this wiring kits on similar vehicles as yours for you to check out also.
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  • Can the 12 Volt Power Wire from a Trailer Wiring Harness Tap Into a 12 Volt Accessory Outlet
    I strongly recommend running the 12 volt power wire from the Curt Wiring Harness, # C59496, directly to the vehicle battery. The 12 volt accessory circuit was not designed to support the additional load of a trailer wiring harness. A wiring harness must have its own dedicated circuit directly to the battery. We have seen many instances where customers have tapped into a 12 volt accessory circuit, like a car lighter socket, and the harness failed. We have also seen instances where the accessory...
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  • 4-Way Harness Recommendation for Converting Separate Trailer Wiring to Combined
    What you have on your RV is very common. There are several vehicles/RVs that have separate turn signals from brake lights so they require a converter like the part # C59496. This kit will give you a combined circuit 4-way once installed on your RV.
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  • Will the Curt Powered Wiring Harness # C59496 Support LED Trailer Lights
    You can certainly upgrade the tail lights on your trailer to LED tail lights. LED tail lights will draw a fraction of the power that incandescent bulbs require which results in less work for the converter of your Curt Powered Wiring Harness, # C59496. There will not be any compatibility issue between the LED trailer lights and the powered wiring harness on your 2011 Volkswagen TDI. I have attached a link to all of our LED tail lights for you to check out. If you would like to send me...
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  • Trailer Wiring Harness Recommendation for a 2005 Cadillac SRX V8 Rear Wheel Drive
    We have some trailer wiring harnesses that have been confirmed to work with the 2005 Cadillac SRX, but they are all the universal hardwire kits, not T-connector style harnesses. For your SRX, we recommend installing the Curt Circuit Protected Tail Light Wiring Kit, # C59496. We have installed this harness on a 2004 SRX, so I attached the installation video for you to check out. I have also attached the installation instructions. The installation for the 2004 SRX will be the same for your...
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  • What Color Wires Are Used for Trailer Wiring Harness On 2016 Mercedes Benz GLA
    In regards to installing a trailer wiring harness on a 2016 Mercedes Benz GLA such as the Curt Upgraded Circuit Protected Powered Tail Light Converter Kit part # C59496 which is what I recommend, you must test the wires to determine function. We are not able to provide wire color information. That said, each kit will come with a tester to allow for easy identification.
    view full answer...
  • Trailer Wiring for 2009 Nissan Armada
    To add a 4-way to your 2009 Nissan Armada that does not have trailer towing package you'd want the 4-way kit part # C59496.
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  • Is There A T-Connector Harness For A 2020 Mitsubishi RVR
    As of right now, there isn't a t connector harness available for your 2020 Mitsubishi RVR. your only option is to use a universal harness like # C59496, which will unfortunately, result in you having to splice some wires. To install this kit, all you need to do is: 1. Locate your taillight wiring. 2. Identify the type of wiring you have. 3. Disconnect the negative battery terminal on your battery. 4. Using the snap locks, attach the input wires of he taillight converter to the corresponding...
    view full answer...
  • Ground Wire Gauge of Curt Tail Light Converter
    The ground wire is 12 gauge for the Curt Upgraded Circuit Protected Powered Tail Light Converter with Hardwire Kit and Tester - 4-Pole Flat # C59496.
    view full answer...
  • Trailer Wiring Harness that Fits 2022 Chevy Bolt EUV
    Yes, the Curt Upgraded Circuit Protected Powered Tail Light Converter w Hardwire Kit and Tester - 4-Pole Flat # C59496 does fit the 2022 Chevy Bolt EUV.
    view full answer...
  • Can I Bypass The Converter Wiring And Wire The Trailer Lights Directly To Vehicle Tail Lights?
    With having a Curt Upgraded Circuit Protected Powered Tail Light Converter # C59496 on your vehicle you will not be able to connect your vehicle and trailer wiring directly. The converter reduces draw on the factory wiring and send power to the trailer lights from the vehicle battery. If you were to connect the wiring directly you risk damaging the wiring by putting the additional draw on the thin factory wires.
    view full answer...
  • Universal 4-Way Wiring Harness that Can Fit Tiffin Built on Sprinter Chassis
    The Curt trailer wiring harness part # C59496 is a universal style 4-way kit that can be used on vehicles like your 2019 Mercedes Sprinter 3500. Since the Sprinter has standard wiring but the RV has LED lights it could work as long as you connect to wiring that for sure was designed to power incandescent lights.
    view full answer...
  • Recommended Tow Vehicle Wiring for Separated Brake and Turn Signals
    For a vehicle that has separated turn and brake signals the Curt Upgraded Circuit Protected Powered Tail Light Converter w Hardwire Kit and Tester # C59496 is the best option because it has all of those functions on separated input circuits, but then the module combines them and sends them to the 4-Way so your trailer gets the exact wiring setup it needs. This also comes with a circuit tester so find the correct functions, and a power lead you run up to your battery so you won't be overdrawing...
    view full answer...
  • Is Curt Powered Tail Light Converter Kit Compatible with a 2014 BMW X1
    The Curt Upgraded Circuit Protected Powered Tail Light Converter w Hardwire Kit # C59496 actually replaced the discontinued part 56146 and the Powered Converter Wiring Kit # 55151 that you have. Both of these are compatible with your 2014 BMW X1 which you can see from the attached installation video of the older kit you have on a 2014 BMW X1. The thing about this kit is that its a universal fit since you splice the wiring in so it is compatible with just about any vehicle out there.
    view full answer...
  • Trailer Wiring Harness for 2018 Mitsubishi Outlander Sport
    I have a much easier trailer wiring solution for your 2018 Mitsubishi Outlander Sport with the Tekonsha kit part # 118538 which plugs inline with the taillight connectors of the vehicle. I attached a link to the install instructions for this kit that shows exactly how it installs as well.
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  • Troubleshooting Trailer Wiring Harness Shorting Out on a 2002 Subaru Impreza WRX Sport Wagon
    First thing you need to do is figure out where the short is on your 4x8 trailer and fix it before you install another wiring harness on your 2002 Subaru Impreza otherwise you will just fry another converter. That's why you are having problems, it has nothing to do with your vehicle. Once you get that situation figured out I would recommend you go with another Curt wiring harness. The correct one for your vehicle is part # C59496. The Curt units use a more modern circuit board than other...
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  • 4-Way Trailer Wiring Recommendation for 2008 2500 Dodge Sprinter
    If you had a 7-way connector at the rear of your vehicle you would probably know it. It would be a black connector plastic connector like the picture I attached. If you have one then the # 118381 would work for you. If not, you would instead want the Curt Wiring Kit part # C59496.
    view full answer...
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Info for this part was:

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Employee Lindsey S
Edited by:
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Employee Jeff D
Installed by:
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