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Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector

Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector

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Trailer Wiring

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Install a 4-way flat on your GMC Yukon with this splice-in harness. Powered converter connects directly to battery to reduce strain on wiring. Potted, SMT construction boosts water and vibration resistance. Works with 2-wire, 3-wire, and PWM systems. Lowest Prices for the best trailer wiring from CURT. Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector part number C59236 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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CURT Trailer Wiring

  • Trailer Connectors
  • Vehicle End Connector
  • 4 Flat
  • Plug and Lead
  • CURT

Install a 4-way flat on your GMC Yukon with this splice-in harness. Powered converter connects directly to battery to reduce strain on wiring. Potted, SMT construction boosts water and vibration resistance. Works with 2-wire, 3-wire, and PWM systems.


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)
  • Ensures that your vehicle's wiring matches that of your trailer
    • Works with 2-wire, 3-wire and pulse-width modulation (PWM) systems
  • Connects directly to your battery to avoid overloading your 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
  • Resists water and vibration thanks to potted enclosure
  • Connects directly to your vehicle's wiring with the included quick-splice connectors
    • Color-coded wires and wiring guide ease installation
  • Comes with dust cap for 4-way flat connector


Specs:

  • Maximum amperage:
    • Stop/turn lights: 5 amps per circuit
    • Tail lights: 7.5 amps per circuit
  • Limited 1-year warranty


Installation

To determine where to splice into your vehicle's tail light wiring, you will need to consult the included instructions. Use the quick-splice connectors to attach the input wires of the tail light converter to the corresponding wires from your vehicle. Once you've spliced in the converter, connect the included hot lead to the black wire and run it 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.


Then locate a flat surface inside your vehicle near the tail lights and adhere the black converter box using the provided double-sided tape. Find a raw metal surface to use as a ground point and secure the white ground wire using the provided ring terminal and screw. Finally, secure the converter wires to your vehicle using the included cable ties.


It is recommended that you use a small amount of grease on the 4-pole connector to help prevent corrosion.


Powered Tail Light Converter with Surface-Mount Technology

Because most trailers run on a 2-wire system - wherein the brake and turn signals are carried on 1 wire - the signals from your vehicle may have to be converted to be compatible with your trailer's wiring. If your vehicle operates on a 3-wire system, which means that it has separate brake and turn signals, then those signals will need to be combined so that they run on 1 wire to properly activate your trailer's tail lights. This converter will also ensure that your trailer's lights illuminate fully, even if your vehicle has pulse-width modulation (PWM) wiring. Note: This will not affect how the tail lights on your vehicle operate.


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.


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.



59236 Curt Powered Tail Light Converter for 2-Wire, 3-Wire or PWM Systems - 4-Way Flat Harness

Replaces 59200

Item # C59236

Installation Details C59236 Installation instructions

This Product Fits The Following Vehicles



California residents: click here



Customer Reviews

Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector - C59236

Average Customer Rating:  4.7 out of 5 stars   (524 Customer Reviews)

Install a 4-way flat on your vehicle with this splice-in harness. Powered converter connects directly to battery to reduce strain on wiring. Potted, SMT construction boosts water and vibration resistance. Works with 2-wire, 3-wire, and PWM systems.

- C59236
by:

Great service from order placement to shipping. Installation without a hitch and any questions were quickly answered by instructions or you tube video. Make sure to habe the right tool for the plastic rivets.



- C59236
by:
2019 Volkswagen Golf SportWagen

I tried to follow the directions and code the wires to the car's function. The brake/directional were on the same wire and easy. However, the taillight was testing on two of the remaining wires. I called for clarification and was given the incorrect wire by two different techs. I had to cut that wire and attach to the remaining wire and everything appears to be working properly now.


Comments
One year later and about 3000 miles on the wiring, everything is working as it should. It is scary to close the tailgate on the wiring, but appears to be okay. Just dont get it near the latch!
Jon R - 12/14/2021


- C59236
by:
2007 BMW X5

I would not have been able to successfully install the hitch and harness without the tech video instructions. It was nearly identical to my 2007 BMW X5. I just had problems putting in the ground screw because the instruction video placed it under where there is a plastic pocket reservoir, and I had to improvise because I did not know how to remove it, so, I had to drill a small hole at an angle and try to screw the ground screw in level by the help of the angled starter hole, and it worked. The reflectors were a bit challenging because of having to contour my arm and hand around the mufflers to squeeze the clips. The harness green wire was barely long enough, but, all in all, everything worked out great, especially, for someone like myself who does not have a mechanical leaning in personality.


Comments
Excellent
Blaine - 09/25/2021


- C59236
by:
2010 Audi Q5

Kit worked well on our 2010 Audi Q5. Don’t follow Tim S. Wiring suggestions. They didn’t work for my Q5. I had to rewire it with different connections as his were all wrong for my car. I included a picture of what worked for me.



- C59236
by:

Product was exactly as described and easy to install. It works perfectly. Installation told 35 minutes. Suggestion for etrailer…The kit only includes one eye ring fastener pre-attached to the white module ground wire. Given that the red module wire will almost always be grounded too, they should include a second eye ring connector. Luckily I had one in my shop.



- C59236
by:
Mini Cooper

Received in record time and had my mechanic install it and he had to do just minor cutting on plastic bumper and good to go 2011 Mini cooper hardtop. Have the wires to hook up the rear camera to the back up lights



- C59236
by:
2013 Audi Q5

Pretty straight forward install on a 2013 Audi Q5 S-Line. There is an ground lug on the rear inside panel right next to a convenient spot to mount the unit. I removed the silver panel along the tailgate sill to route the power wire and the trailer plug tail before I started. It clips off easily, and you can reach between the side panel and the battery compartment with your fingers. There's a small electrical connector on the panel, so be careful to disconnect it before yanking on it. Make sure you replace this panel as soon as you have routed the wires, as that electrical connector is to two micro switches that detect if the door is closed... there is no power to the rear lights while the tailgate is up, so this panel needs to be in place before you start wiring. Correct wires were easy to locate. The 2013 Q5 is a little different to the wiring types listed in the instructions, as while the brake runs off the turn signals, there is a separate tail light wire. If you are probing for the wires, close the tailgate, and climb in through the rear passenger door. Here are the correct splices off the tan connector... Tail Light (Brown) - splice to Black with Green trace Left Signal (Yellow) - splice to Gray with Black Trace Right Signal (Green) - splice to Gray with Blue trace Red and White both Grounded together. The only issue I had was that the blue splice connectors supplied are too big for the fine wires on the Audi, so when I tested the install, I had nothing working. I replaced the blue connectors with the smaller red ones, and all worked perfectly then. Start to finish, about 90 minutes.



- C59236
by:

Easy to install even if you know nothing about wiring the YouTube video with step by step instructions makes this wiring harness easy to install


Comments
Was easy to install and still works Great
Michael - 08/20/2021


- C59236
by:
2021 Toyota Highlander

There needs to be a 2021 Toyota Highlander specific set of instructions, or even better a video. First off, the battery is located behind the right rear wheel well, key points being being the heavier guage battery wire supplied only needed to be about 18" long, as best space available for control module is right next to the battery. Because of that, the long signal wire should be the left side, not the right side, but as the only reasonable place to splice in brake, turn and running lights is at the rear lighting housings, a little primer on removing / replacing them without scratching your paint would help the newbies. Getting wiring from the battery area to the taillight housings could use some clearer instructions. Basically the included instructions, and to a good degree the kit, are a bit too generic for the newer Highlanders.



- C59236
by:

Pretty straightforward installation. Just had to do some research to determine which wires were the right ones for the turn signals on my car. The newer cars with CANN bus systems have made it difficult for plug and play type adapters so this is the next best thing. But, price gets high when you have to use a module. I ordered this along with the hitch and they were both in the same large box. Box was damaged and opened, then re taped closed. The wiring module was out of its packaging and all the pieces were all over the larger box. Luckily everything was there and I got it installed rather quickly.



- C59236
by:
2012 Chevrolet Volt

The wiring kit was complete, solid construction, clear directions, and worked very well. This was my first time wiring a car for a trailer. I was lucky that there was already a 12 volt power line running near my trunk auxiliary power/cigarette lighter plug), so it was easier than I was expecting. It’s been a year now, and it’s been no issues yet. I don’t remember how much I paid for the kit, but it must have been close in price to others - and it has been a super value for me



- C59236
by:

The powered tail light converter makes the lights on both trailer and the vehicle perform as if it were factory installed. The only drawback is the wiring instructions were a bit confusing. The person who helped with the installation is a professional auto mechanic, and we had a bit of trouble decifering which wires went where. It came down to using a bit of trial and error at the end to get it right. But once we figured out out, it works great. Overall, a very good item.



- C59236
by:
BMW

2009 bmw 528i. you almost can't see the trailer hitch below the bumper. I've NEVER seen a Beemer pulling a trailer............. Electrical hookup was just as the instructions said. BMW has the battery in the right side of the trunk so power hookup was easy. I put the pig-tail down in the spare tire well when not in use. Feel free to use whatever pics you see fit. Great product and install videos.



- C59236
by:

Took me a while to get around to installing the hitch and wires, but when I needed to tow, I had all the components bolted onto my car and I was cleaned up within an hour! Wires took a little longer, but only because I triple-watched the youtube etrailer supplied. Although the model of car they showed was different from my own, I was able to figure it out quickly and confidently. Five stars!



- C59236
by:

This is unnecessary work for a 2021 Toyota Highlander Limited. The vehicle has a plug-in for a converter behind the left rear interior quarter panel. Also there is a plug-in under the rear bumper cover on the left for your trailer wiring harness. You need etrailer part TK99FR, which gives you an easy plug-in converter, and the wiring harness for the rear of the vehicle. Done!



- C59236
by:
2013 Ford C-Max

I finished the installation of the hitch and wiring harness last night. I left turn signal wasn't working but that's because I didn't secure the wire properly in the butt connector. The only suggestion I would make is when they tell you to use tape so you won't scratch your paint from the tail light I would suggest using a soft rag or paper towel because the tape left gum on my paint now I need to remove that. The videos were a big help. Everything works fine looks good.


Comments
Really well. I use the to tow a motorcycle trailer with a single motorcycle. No complaints works excellent.
Anthony P - 09/08/2020


- C59236
by:

Great service, shipping was on time, product worked, packaging was over the top, as usual etrailer was amazing



- C59236
by:

Great product, great price, and even better customer service. So helpful and understanding when I called to change my order. A1 company, customer for life.



- C59236
by:

Straightforward installation and works great!



- C59236
by:
1996 Toyota Camry

Everything was there that I need to wire my Camry for my little trailer along with the hitch I order. Perfect fit just like they said it would be. Everything I've ordered from them has been as they said it would be. Very happy with this compamy.



- C59236
by:

Works great, straight-forward install.


Comments
Replaced it. The control box was directly behind rear tire. I think water and road salt got in and messed up the controls. I got the same harness but sealed where the wires came in.
Craig - 10/30/2021


- C59236
by:

About a year ago I installed this wiring set on my wife's 2020 Kia Soul with LED tail lights. The process was a little more complicated due to the LED option on the car, but with basic tools and skills it was not difficult. The result is perfect and allows me to pull a small trailer with the car with all lights working perfectly.



- C59236
by:

The etrailer video was very helpful for the install. My only complaint is that the wire that runs from the control box to the passenger tail light could be 6” longer. I simply spliced it to a lower point on the tail light harness. Still made for a clean and hidden install.



- C59236
by:

worked great.had it installed by professional and no problems. use it a lot. however, the wiring harness was the wrong one but the pro was able to fix the problem. need better info for wiring.


Comments
Hi Charles, Thanks for your feedback! This wiring harness is designed to fit in your 2020 Kia Soul as long as you have the LED light package.
-- Etrailer Expert Tyler M - 03/23/2021


- C59236
by:
2008 Dodge Ram Pickup

Used a fuse tap on our 2009 Audi to connect to rear fuse panel. Made the install very easy.


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Ask the Experts about this CURT Trailer Wiring

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    Both the Curt # C56175 and # C59236 will add a 4-way trailer connector to your 2006 Volkswagen Golf. The main difference between these products is that the # C59236 is a powered tail light converter, which means it gets wired to your vehicle's battery instead of only receiving power from your vehicle's tail light circuit. Basically, what this does is limit the power drawn from the tail light wiring to isolate your vehicle wiring from your trailer wiring. In case there is an overdraw situation,...
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  • How To Install 4-way Trailer Connector In 2021 Toyota Highlander XLE Without Factory Tow Package
    To install the Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector # C59236 you were looking at for your 2021 Toyota Highlander XLE I recommend removing the trim on the inside of the hatch and mounting the converter on the driver side of your Highlander, and using a circuit tester like # PTW2993 to identify the correct wires to splice in to. Another option is the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # TK99FR which is confirmed to fit your Highlander...
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  • How Does Curt Powered Tail Light Converter C59236 Get Installed In 2007 BMW X5?
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    All three of the kits you mentioned are a fit for your 2003 BMW X5 with the difference being that the # 119190KIT and # C59236 are universal kits that require splicing into the vehicle wiring and the ZCI part # 119250KIT is a similar option that uses sensors instead of splicing for an easier and less invasive install.
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    The trailer wiring harness that I recommend for your 2013 Volkswagen Golf TDI is the Curt Trailer Wiring Harness, # C59236. This harness was designed to work with vehicles that use tail light wiring with pulse width modulation (PWM). PWM sends power to the vehicle tail lights as signal pulses, so it requires a wiring harness with a powered converter to decipher those pulses. The best instruction we can give you at this time is to access the tail light wiring either by removing the interior...
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  • Wiring Installation of Curt 4-Pole Harness C59236 in 2013 Mini Countryman
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  • How to Determine What Wires Get Run to Curt Wiring Harness # 56201
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  • Troubleshooting 4-Pole Wiring Installation
    Thank you for your many purchases from etrailer! We appreciate your repeat business and your trust. The item you installed was Curt 4-pole harness kit # C59236 which is a confirmed fit for your 2012 Kia Sorento. Your trailer's right stop/turn light staying on whenever the trailer is plugged in could indicate damage in the converter but it could also be something as simple as a bit of trapped water or dirt, or perhaps corrosion inside the electrical connectors. It is easy to test to confirm. I...
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  • How to Install Curt Trailer Wiring Harness # C59236 On a 2012 Audi Q5
    I checked with Curt to confirm the wiring harness specified for your 2012 Audi Q5 and it is indeed the Curt # C59236. I also spoke to my technical contact at Curt and he confirmed compatibility with your 2012 Q5. This harness provides isolation and protection of the vehicle electrical system from the trailer lighting. I have linked the installation instructions for this wiring harness as well as a helpful article. This is a hard-wire type harness that does not use plug-in t-connectors...
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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Lindsey S
Edited by:
Lindsey S
Employee Joshua S
Video Edited:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Kathleen M
Video by:
Kathleen M
Employee Zach D
Video by:
Zach D
Employee Jonathan Y
Video by:
Jonathan Y
Employee Michael B
Video by:
Michael B
Employee Jacob H
Video by:
Jacob H
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Jenny M
Updated by:
Jenny M
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Kristen H
Written by:
Kristen H
Employee Brent H
Test Fit:
Brent H
Employee Shane H
Test Fit:
Shane H
Employee Robert C
Test Fit:
Robert C
Employee Conner L
Test Fit:
Conner L
Employee David F
Test Fit:
David F
Employee Ryan G
Test Fit:
Ryan G
Employee Clayton O
Test Fit:
Clayton O

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