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

Not a easy install two of us spent about a hour product does work very good 484809

Great

Robert - 03/14/2019

by: David08/20/2018

Arrived quickly and worked well. Instructions seemed a little vague to me but I figured it out. Email question was answered promptly. 555454

by: Michael10/03/2018

Very good product and directions for installation. Hi 571396

I installed it on a 2004 Sprinter van. Took some time but was not difficult. Both the wire to go to the right side and the one to go to the battery were short. But I was able to splice the right blinker in to the bundle that ran over there and knew the power wire to the front would be too short from other reviews. So far works great and I would buy again. I have installed a few hitches and wire hook ups that I have gotten from Etrailer.com Always have worked fine. 546840

We have an '06 BMW X5 (E53). Watching the BMW installation video on your site made installation easy and quick! My only regret, not purchasing the Curt LED 4-Way Flat Connector (Vehicle End) Tester. 429720

Installation took a little bit of time but works great 544507

by: Delle09/09/2018

Easy to Install. Looks like OEM. 563366

Great product and excellent instructions. The YouTube installation video was perfectly done and showed clearly every step. All of the parts supplied (with the exception of the continuity tester which was omitted) fit perfectly. The step by step power supply wiring was very helpful as it removed any doubt what was the best path to chase the wire to the battery. 508506

reçu produit en très bon état, dans un délais raisonnable. service courtois et soucieux du service après vente. translation: received product in very good condition, within a reasonable time. courteous and caring service. 514437

Took about an hour for me to install, overall it's a great fit and etrailer's video install instructions made it easy. I had installed one of these on my 2013 gti and the process was very similar. 362351

The installation instructions are straight forward. Installing on my 2018 Tiguan was a bit of a pain in the butt as VW gives you little to no slack on the tail light harness to work with. Literally maybe 2 inches of slack if that! Also you have to run the 12V battery wire under the vehicle as there is nowhere to get thru the firewall so running the wire inside the vehicle is not possible. There was however plenty of wire supplied for the 12V supply to get the install completed. Also the Tiguan has a windage tray the length of the vehicle so as long as you secure the wire away from any moving parts its well protected. My only complaint with the product, (And this is nit picking a little), was the green wire that supports the right taillight, Blinker/stop light was a bit short. It would have been nice to have maybe 4 more inches to work with. As it was, I had no slack on the Tiguan harness and this just made it more of a pain in the butt to install. There was enough wire to get from the left side of the vehicle to the right side but just enough and a little more slack would have made it easier. My install difficulties with the Tiguan is no fault of the product but other then the green wire being a little short the product works as advertised. Again installation is straight forward and difficulties running the wire thru the vehicle is no fault of the product! I gave it 5 stars as it does work well. 444853

After a year the harness is still working well.

Tim H - 10/23/2018

I used this on my 85 Toyota landcruiser. I had bought another brand at the local farm store and I finally gave up trying to get my lights working correctly. I’ve always had good luck with etrailer products, so I ordered this and ripped out the other box and wiring . Curt’s directions were great and this one was superior in every way to the other one. I now have perfectly working trailer lights. Thanks for a great product. I should have gone with this first and saved money and a lot of frustration. 539661

Works perfectly and everything I needed to install was included. No way I could have done it with the enclosed instructions but the video on the website customized for my Audi made the whole process 100% doable for a less than average mechanically inclined person such as myself. If the site has a video for your car, buy this kit!! 385761

Connectors are less to be desired and sporadically made connections. So instead, I soldered and heat shrunk all my connections. 516532

After reviewing the instruction sheet and understanding that I needed to run a power wire from the unit to the battery. I decided to let my Saab mechanic to do the installation. I figured that the time it would take me to route the power wire to the battery would take hours and that my Saab mechanic could do this within an hour because he knows that car better. 518074

The Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector arrived right on schedule. The kit is excellent. The kit for my 2018 Hyundai Kona required one to splice into the appropriate wires to get the signals required to operate the module. One a previous vehicle, it was just a matter of unplugging some connectors and plugging in the adapter plugs, nice clean and easy. Not so with the Kona. The brake and tail light wires were relatively easy to obtain, but the left and right turn wires were up under the turn signal lights and difficult to get at. I ran wires under the vehicle and brought them into the spare tire area through a hole in which I installed a rubber grommet to the wires would not be cut. All four control wired were connected to a terminal block mounted inside the hatch on the drivers side. The converter was mounted just above the terminal block and the four wires were shortened and connected to the appropriate terminals on the block. Being an electrical engineer, I was able to determine which wire to connect to with a voltmeter. I wasn't able to find anything about wire colors and signs names. It all worked out nice and clean. 539215

The instructions for their universal wiring harness are very simple and easy to read, but finding the color diagram for the tail-lights on BMW 5-Series to match it up to took several hours. And I'm glad I did, otherwise I was about to really mess it up. (I was about to match color to same color, when my wife called in for dinner. Considering the BMW color schematic i would have ended up butchering those wires before I ever got it right.) 499246

The Curt wiring harness isnt a vehicle specific item that should be wired by function, not by color. Its recommended that a circuit tester like # 40376
Circuit Tester Kit
$51.56 be used to verify the function of each wire in the vehicles taillight wiring harness.

-- Mike L - 04/23/2018

Helpful Link

Be careful with the videos buyers, I assumed the GTI example would be "Close" to my Audi A3 but was wrong. Also, the vague printed instructions leave you to making assumptions. Have not powered up a trailer yet. 495242

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. 232589

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It was very easy to install. I'm my benz there is a positive cable in the right rear of the car. So I had to extend the yellow wire and I used the green to do so. Only reason it specidied that yellow was left turn and green was right. Very easy to install haven't tested on trailed yet. But I'm sure it will do just fine 424469

Fit as a glove on my 2010 VW Golf. Corresponding wiring harness was a bit more challenging but worked as a charm. Very happy! etrailer.com knows what they are selling, Trust them! 416882

I'm very satisfied with the product ! I followed the directions and watched the video on the eTRAILER website. WATCH THE VIDEO SEVERAL TIME ! DO IT. Don't get in a hurry. Just settle down and take it one step at a time. Do all the recommended tests. If you have a voltmeter you can stick a pin in the wire you want to identify, attach the red - positive lead from the voltmeter to the pin, and the black- negative lead to GROUND.. ie. bare metal on the car - I used a screw hole that you see when you take off the rear brake light nacelles. You can see it's shiny metal in the threaded hole. Turn the voltmeter to DC volts .. you are watching for 12v. Naturally it will cycle with the turn signal wires. Running lights won't cycle.. they go stay on . IF you test each wire before you build the connection you'll be sure to get it right. Just relax and think ! You'll be fine. The wire that goes to the battery is a bit of a hassle to install as you have to crawl around under the car or truck. My jeep is easy to crawl under :) if you have to jack up the car USE JACK STANDS EVERY TIME. If you're afraid to get under the car get a friend to help you. Use the zip ties to keep the wire to the battery from flopping around. Make sure you don't get the wire near exhaust pipe or exhaust manifold, steering column or any MOVING PARTS.. Use the whole length of the wire... don't cut it off until you're SURE you have it where you want it and it reaches easily to the battery. Expect some minor hassles. You might have to stop and go back and check the video or the wiring instructions. Just take it one step at a time... and you'll be AOK ! 443803

The harness works well, and took a coupe of hours (and attempts) to install on my Golf R. It took over an hour to run the power wire to the battery through the interior/firewall. The rest of the basic install was a breeze. It was a bit more problematic for me, as I had installed the Euro tail lights (which have separate turn signals). The kit i bought could handle the 5-4 conversion, but I ran into a problem. Even though the car was re-coded for the lights and supplying 5 V to the running lights, both kits I tried would not trigger running lights on the 4-wire output. On the advice of a tech (thank you!), he mentioned that he had seen one other instance where it worked to use the license plate light as a source for the running light input. That worked perfectly, and ended up being a grey wire in the passenger side rear bundle. A little extra wire (and another TIGHT splice, and all was good. Thanks, again for all of your help! Your team really went above and beyond helping someone with a non-factory install. 543835

I appreciate that you replaced the defective tail light converter that I purchased from you. Unfortunately because the original was defective I lost 3 weeks of using my new trailer and spent a lot of time uninstalling the defective part, going to the post office, and installing the new part. This was very inconvenient. 563232

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. 488584

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In a world where customer service is 6 prompts and 20 minutes away, the opposite happened here. The phone was promptly answered, the order was quickly placed, and parts arrived 2 days later. COULD NOT HAVE BEEN DONE BETTER!!!! Thank you, Danny 456320

The hitch I ordered arrived when promised, was packaged well and all parts were there. Everything bolted up like it was supposed to and only had to drill two holes. I installed by myself without any problems but would suggest getting a friend to help as there was a point that I could of used another arm. I would recommend this product and company to anyone.One sidenote.... I live at a different address than what it was delivered to and the company called me to make sure it was really me and not fraud, I can't recall another company doing that and I appreciate it 473471

by: Peter E.10/30/2017

2016 Mazda CX-9

The Curt Powered Tail Light Converter (w/ 4-Pole Flat Trailer Connector) is a critical component to a trailer hitch, and unfortunately the most finicky/tricky part of the installation for a DIY self-installer. However, after research and plenty of viewings of installation videos (including the one on eTrailer.com) it came together successfully. This product worked quite well. Most installations recommend running the main-power wire along the undercarriage to connect to the battery. However, in my installation on our 2016 Mazda CX9, upon inspection I found that route to be far too difficult (requiring the removal of a number of undercarriage/skid plastic panels, plus getting into the engine compartment was to be a huge challenge) - instead I found the easier/better option (which I used) was to stay inside the passenger compartment and run the wire along the floor behind door panels. It worked out quite well, and then access past the fire-wall into the engine compartment was accomplished using the same access-hole/rubber-boot that the factory used to bring all the OEM wiring in. All in all - the installation was successful this Curt wiring harness was well designed and we saved a significant amount of money by installing it ourselves. Thanks! 447338

Needed a powered wired harness for my wife's 04 BMW X5. Very hard to find one that works. I wrote to Curt and Hopkins. Both said they didn't make one to fit. I called etrailer and fortunately for me Rose answered and said that Curt had one. I told her that THEY said they didn't have one. She volunteered to put me on hold and called Curt. The said said someone gave me bad information and they did in fact have one that worked (C59236), so I ordered it. UPS to USPS came in 3 days. Complete kit even though the kit says you need additional parts. While troubleshooting which wire went were I called etrailer again and Kelsey I believe told me where to find instructions on their website. After a little trouble and down to two wires I called back to their tech department and he stayed on the line while I troubleshot. I figured it out and from start to finish I was done in about an hour (I have done 2-3 before but anyone can do. BTW BMW battery is in the back so you don't need to run the 12G wire up to the engine compartment. I tested all the wire with my tester and all work. Thank you Rose for saving me about $70! I didn't need the $142 wire kit after all. Good company and very helpful. Cuddos to all! 367893

Still 5 stars. Still have the car even though I sold my trailer. etrailer support was excellent! Most helpful of all.

Steve B - 04/15/2018

Easy to follow instructions. 417171

All is well. Don’t use it that often but when I needed it they’ve been there. I’ll use etrailer from now on.

B K - 08/10/2018

This trailer wiring kit is a bit pricey but worked flawlessly on our Volvo V70. By the way, the instruction video was on a different Volvo but the wire colors identified in the video matched my car. This way I only had to test one wire for each of the 4 functions instead of poking dozens more. Watching the video made the job quick and easy. Interestingly, the trailer lights were brighter when hooked up to the Volvo than when it is hooked up to our Chevy truck. This powered kit must deliver more juice than the factory GM wiring plug-in. 542518

I have not finished installing this wiring yet. I don’t know how it’s supposed to wire up and will have to get professional help. It’s too much. Should have been color coated the same way as the wires in the car. 538844

The wiring harness you purchased isnt a vehicle-specific item, it would fit many different vehicles so therefore it wouldnt be possible to color code the wires as different vehicles use different wire colors. I do have a video showing a different wiring harness being installed on your vehicle. Simply use the provided link to view the video.The install procedure on your vehicle should be identical.

-- Mike L - 07/09/2018

Trailer Wiring Harness Installation - 2007 Cadillac SRX - Video

Great. Installation notes: On a 2015 Golf TDI Sportwagen, there are 6 T25 screws in each rear wheel well. You need to remove the rear most 4 of those, 3 into bumper cover support frame, and one oriented 90 degrees offset from the others, into rear fender. This is much easier to do if you jack up the car and remove the rear wheels. If you are working by yourself, it helps to have jack stands to hold the rear bumper while you remove the screws, and to hold the trailer hitch and rear bumper when you install them together. See picture. You can squeeze the 4 wire trailer socket through the square hole for either tail light (the hole is larger than the socket on the tail light), and wrap the flat 4 wire bundle in electrical tape where it crosses that hole below the socket on the tail light. After you reinstall the bumper cover, when you reinstall the tail light, just make the plastic thumb screw as tight as you can with a flat screwdriver to compress the foam gasket over the flat 4 wire bundle. 522053

Easy to install and instructions were clear to follow. Took about 2 hours start to finish and that included taking everything out of my car to access the wiring. The only thing I did differently that wasn’t included in the package was heat shrink the wires vs electrical tape so it will last longer and have a water tight seal against any moisture that may occur. The system worked PERFECTLY for my application. Due to my car having a PWM electrical system, this was a requirement to run trailer lights. If I have another vehicle with a PWM, I will definitely order this product again. 428179

What an amazing and very easy to install wiring harness, it took me all of about 15 minutes to install it to my 2009 BMW X5! The only thing I would suggest is if you install it on the BMW hold the terminal down on the battery while you connect the power lead, I didn't and my passenger air bag the restraint warning light and the 4x4 light came on. The warnings did go away after a few hours of driving but it had me worried I was going to have to make a trip to the dealer. Other than that amazing product! 419247

This kit was almost physically identical to 56146kit that I purchased less than a year ago from Etrailer. Two differences are apparent on the C59236 are that the controller can be attached securely and is sealed to prevent any moisture migration although it should be mounted in a dry area! I suspect the adhesive only attachment failing contributed to the now discontinued 56146kit due to vibration? A good supply of necessary parts and instructions are included. Yes, this is a very good kit and hope that it will provide many years of service. 498511

Took a while to deliver and the box was damaged, but everything was fine and the price was good. I would purchase again. 643122

Great product, easy install, excellent customer service. Buy your own 15a inline fuse you will save 20$ 638951

by: Rudy T.05/03/2019

Some trailer don't have the proper connection for the trailer light hook up. Installed very easy though. 637272

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Great product, Took some time to instal l. 637104

The product worked well for a 2004 Porsche Cayenne turbo with a uhaul trailer and LED lights. The instructions could be better and should be more car specific. 636696

Easy to install. 2011 BMW X5. Battery is in the back so easy to connect the +12V lead 636459

by: Fred04/27/2019

Product quality is very good. Works as designed. I just wish there was an option to download vehicle specific install instructions. 635420

by: Gregory C.04/21/2019

Great quality wiring harness. And was very easy to install. Installation went very smoothly. 633924

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by: Peter S04/21/2019

Everything went great with the install and the product works good. 633879

Worked for by 2018 Bolt! Mounted it in the rear bumper facia and connected it to the turn signals and running/brake light mounted in the facia. On the bolt if the hatch is not fully closed (only secondary latch holding it closed) the facia lights take over the duty of being brake lights from the hatch mounted ones and it made the installation very easy since I had the facia off for the hitch installation. 633094

U Haul did not have a compatible harness. Received on time and installed this morning by local U Haul dealer with no problems. Very satisfied. This is my third etrailer purchase and all good. 629261

by: Ken04/11/2019

After more than 1 yr and many uses , the trailer hitch and wiring are still functioning great! 621512

by: Robert04/07/2019

works great 619197

by: Dieter03/05/2019

I have not yet installed the tail light converter, since I am afraid that it will affect the warranty of the car. The wiring on a modern car is more complicated than I had expected. When I really need the lights for my trailer I will have the unit installed by experts who are familiar with the type of car I have. 610431