To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
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.
In-stock alternatives that can ship today
Quickly and easily install a 4-way trailer connector on your Hyundai Elantra with this custom harness. T-connector plugs directly into existing wiring. Powered converter reduces strain on wiring system and is made using SMT to ensure superior performance.
Features:
Specs:
Installation
This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side and passenger's-side tail lights. You will have to remove the trunk storage trays and the rear scuff panel, and pull back the felt trunk liner to access these connection points. Once you've plugged in the T-connector, run the hot lead 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.
Once installation is complete, the 4-way connector will be stowed in an out-of-the-way location within your trunk.
It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 4-pole connector itself - to help prevent corrosion.
A tail light converter is built into this T-connector. 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.
Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your vehicle's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.
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
The plug and play is super easy to install. Directions were good. The photos were too dark. The sticky pad for the black box could be a touch thicker to better adhere to contours in the metal. Excellent product
I had trouble at fist but it was my trailer at fault etrailer help was unprecedented thanks for the great service wires work great such a pleasure
My ebike blocks my tail lights so i figured I'd put some magnetic lights on the truck lid
The harness was straight forward & easy to install. Running the wire to the battery was the only thing that slowed it down abit.
My trailer harness does not fit, it has 6 prongs and my vehicle has 4.
Jenny N.
7/20/2023
Sometimes finding the right connector can be tricky. I wanted to confirm that you have the Hybrid Blue version of the 2020 Hyundai Ioniq?
Wow, that installed easy.
The installation was pretty straightforward. Unscrew some interior panels and plug and play the T connectors into the existing wiring harness. The biggest hurdle was routing the power cable to the battery. I couldn't find a spot to feed from the cabin into the engine bay so I opted for routing it through the bottom of the car. Fortunately there's 2 drain holes under the spare tire that are great for feeding it outside. Then I undid the underbody panel that runs along the length of the car on the driver's side and ran the cable through there. After that I routed it upwards through the engine bay and on the battery. The only big negative was the crimp connectors sucked and didnt hold very well. My battery also has a plastic cover over the terminal that you hook up the cable to so I had to cut a slot in it so it could close properly. Fortunately the wiring works and all my trailer lights correspond well.
Finally finished installation of the trailer wiring kit. The kit goes together really easy and is a quick install with the exception of the battery wiring. Hyundai did not make it easy. I went through an existing grommet in the rear passenger side (underneath the tray) and then routed it along a wireway on the bottom of the car on the drivers side using the zip ties provided in the kit. I couldn't get the wireway apart so I ended up just loosening it up and tucking the wire in using the blade of a screwdriver. Pulled it up through the engine compartment using a short piece of fishtape and crimped everything together. Kit works great and is holding up well (100+ miles already).
This wiring kit worked very well. The directions were clear and I was able to install it in less than an hour. The only reason for 4 stars instead of 5 is I would be happier if It didn't need a connection to the car battery. Most harnesses I have installed get their power from the vehicle wiring harness alone.
Rather than go below the car, I chose to run the 12 volt feed wire along the inside driver side door trim panels and take it through the firewall where the hood latch cable exits the driver cabin.
The 2018 Ioniq moved the engine battery next to the hybrid battery so I had a friend hold a screwdriver against the battery cable while I loosened the nut and slipped the controller terminal on the post.
The electrical kit went in straight forward. It's a little odd that they use a black wire as a positive. The plug and play made connecting very easy. Had more issues popping the trim tabs than anything else.
Worked with Carmel, she made ordering my hitch and accy's easy and quick.
Speaking of quick she told me that she would place the order and that it should go out within 4 working days. I received my complete order within 3 days. Now that was fast.
If you need a hitch get it from etrailer, one stop shopping!
Works perfect no issues longer part of install is routing the power wire from the battery still done in 45 min....best part is there are no scotch blocks to mess with your wiring, all plug and play
Used my rear power outlet for 12v to power control box. Works great.
Made installation nearly plug and play. Worth every penny.
plug and play
Great item..... Great instructions! Took about an hour to install and everything worked as it should. Prompt delivery as well!
Good quality. Easy to install. Competively priced
Harness fits 2020 Huyndai Ioniq plug-in hybrid.
All products fit including wiring. Great customer service, although it took a couple tries to reach them.
Wiring went in super easy. The only issue was in running the +12 volt line the whole length of the car. I had to remove and reinstall a lot of trim.
Shipped quickly everything fit perfectly as described.
Items arrived and performed as described. Good quality, fast delivery and price made this purchase an overall GOOD DEAL!
Was easy to install and has worked grea t!
this was a cinch to install! highly recommend. took me about 25minutes tops and finding the right path to wire to my battery took the longest.
Worked fine
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.
Mike
3/27/2025
The trailer hitch was a breeze to install. It still is in place and performing well.