To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
In-stock alternatives that are ready to ship
Install a 4-way flat on your Audi Q7 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:
Specs:
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.
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.
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.
California residents: click here
Average Customer Rating: 4.7 out of 5 stars (638 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.Would not work for my vehicle. I had to repin the connector to get it to work properly. NON led lights.
This was not in the description anywhere that this part would not work with non led lights.
David B - 09/06/2022
This converter worked great on my 2018 VW Alltrack. The way I've got it installed, all the wiring is inside the trunk and never exposed to the weather so I expect it'll last a while. When I hook up a trailer I just pull the leads out, and close the trunk lid on the wire. As long as you don't close it on the actual 4-pin connector there's plenty of clearance between the trunklid and the floor while closed so the wires don't get pinched.
Works great, have used it many times this past year to tow a small trailer and sailboat with my 2013 Chevy Volt. Seems to be very safe and secure so far.
My tail light converter just arrived, on time, and with the detailed installation videos available from Curt, like those for my hitch installation, I don't anticipate any major issues!
2017 Audi q7 is a "2 wire" setup. I finally figured that out, grounded the red wire and everything works beautifully. I also pulled my power from the fuse box in the left rear luggage area. The red bus has 25 amp fuses. I installed a buddy fuse adapter with the 15 amp fuse that came with this kit. That saved me a lot of time taking apart panels to get to the battery.
Jenny N - 05/06/2022Installation stretched my limits, but we will blame that on the car and on my narrow limits. It is a tight and clean install. Has worked flawlessly this past year. I used it just yesterday to haul junk and brush about 100 miles for disposal. I would definitely buy this hitch again.
Andrew - 04/15/2022Got this to install in my 2016 Volkswagen Golf. I had a mechanic do this one, which gave me the option of the 4-way connector, then proceeded to install a 4-way-to-7-way adapter in addition to running a line from the car battery, to tow a 13' Scamp fiberglass trailer. 2 years later, it's still working just fine, no problems or issues.
I put this on a Chrysler Pacifica. Worked flawlessly for the year that I had. I tow a trailer at least weekly.
Quick and easy install, tutorial videos were big help, will always buy from etrailer now
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.
Jon R - 12/14/2021My experience was smooth and pleasant from start to presently still purchasing items...fast shipping all the way on each order i place.
Excellent directions. Supporting installation directions online were good too. Has been working great for the last year with no issues. I would highly recommend if you are looking for the 4-pole flat connector setup. Installed on 2010 BMW X5.
Bought it with a tester light. Had a local window tinting and stereo shop install in hours.
Well I ordered the wrong wiring because I was told my car wasn't wired for a trailer package. I later found the plugs and returned this one and got the right one. it was very simple to install.
Worked for the first trip and then lost brake and tail lights. Frustrating for an expensive converter.
Jenny N - 06/15/2022Pretty 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.
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.
Tyler M - 03/23/2021 Charles - 03/22/2022The video of the install on my exact car, model and year, made this very easy. I’ve never wired anything in my life and the kit made it very easy.
This is the economy priced powered converter, requiring physical connections, vs the induction pickups of the expensive setup. A little more time, but saves $$$
Your product worked great and was easy to install.
I really like the product it was easy to install the directions easy to follow
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.
I have a repair shop and after client's want a hitch installed, will buy again
I was waiting for the correct vehicle specific part. etrailer called said they had an equal they could ship right away. I would not have to wait as the equal would work. Took me 3 hours to modify vehicle wiring to adapt to the so called equal. Not happy. Check me out I am a long time loyal customer. You shouldn’t treat good customers like this just so you can make a sale
Wiring harness arrived on time and was installed by professionals. Very satisfied.
Myles - 05/05/2022Do you have a question about this Trailer Wiring?
Info for this part was:
At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.