Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
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2021 Hyundai Santa Fe
These items fit your vehicle
2021 Hyundai Santa Fe
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Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring - no cutting, splicing or tapping required. Converter 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 either behind the driver's-side and passenger's-side tail light assemblies or behind the rear bumper along the frame rail.
Once installation is complete, the 4-way connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.
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. 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.
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Super simple plug and play, impossible to mess it up. I forgot to look at the included materials like the zip ties and double sided tape to mount the box. I used my own materials, and found an exposed bolt where you can attach a 10 mm nut. Worked immediately, just make sure to find a good grounding point. Only way to make it even better is to bring your own plastic conduit to cover up the colorful wires.
So far good thanks. Do you all make one for a 2000 year model pick up truck
Fairly easy to install the receiver by myself. I cheated and used a motorcycle lift to help get it in place and hold it.
Kenneth
6/12/2025
Still functioning as it should.
Only one of the lights worked on my boat trailer. Will keep trying to see what the problem is. Might be that I need to reposition the ‘Sender’ onto the trailer so that it can have a more direct access to the lights. Perhaps the boat is interfering with the signal?
Nicely built and easy to install. Pretty intuitive once you see the connectors. Came with a screw for the ground lug, but I connected it to an existing bolt using an M6 nut.
It worked great in the end, but the instructions were unclear so I had to rewire it.
Was purchased for my T100 and it clicked right in to OEM harness. Was able to wrap it to existing harness for a clean look, and trailers now show both running and brake lights.
Super easy install. Video was perfect. Whole thing took 15 minutes
The t-connector harness is very easy to install. The instruction photos could be a little clearer though.
That's my kind of wiring. I shopped around for installing trailer wiring. Prices were as high as $100. ! This kit for my Toyota Tacoma cost $35. I loosened four bolts, drilled in a ground screw. Plug and pull wire and done. I was able to pull the wired to the far side throughout the hollow receiver hitch. Didn't even need the zip ties. Great company. Thanks
My ítem was shipped the same day. I just spent 15 minutes on the installation. Really easy. Great service and product.
So easy I did it from the ground. I found it is not necessary to unhook all of the connections and remove the taillights. It took about 30 minutes
Mike
8/28/2024
Still working as expected very high quality
Have used this before, super easy, and well made.
It was what I expected, and it did the job! Thank you.
worked fantastic!
so easy to install
Easy fitment and good wire length allowing for protected box placement.
easy connection worked like a charm.
Fit perfect!
Super easy install. Was a breeze and didn’t take too much effort wise. Ended up covering the runs of wire with wire loom for added protection. Added this to the 4 way flat adapter and mounting bracket so I didn’t have to leave the connector hanging off the receiver.
My pickup had a new frame installed due to a manufacturer's recall. During the installation the old wiring for the trailer lights was taken out. I didn't want to pay for a commercial company to reinstall a wiring kit after I saw how easy this system was for installation. The Curt custom fit vehicle wiring was as easy to install as claimed. I have limited mechanical experience so I would say anyone who can read directions and has a few tools can do this.
Lee E.
3/5/2018
Im still very pleased with it and would recommend it to others.
Received and installed by my garage within two hours. This harness eliminated the need to cut and splice into tail and brake lights. Have not tested but confident in your products!
Allen
3/19/2024
Excellent. Basically a simple installation.
could have come with better instructions. Watched you tube for installation instructions.
Wire length was perfect . Plenty of slack . The directions are inside the package and are simple . Vague on a few little parts but if you search out the answers it’s simple . The lights on my truck worked after installing just as they did prior to the job and I will test the u it tomorrow when my tester arrives , or if I just back up to my boat . I loved the included zip ties to get the wires neat , and the whip is long enough to put literally anywhere . I’d buy this again for sure . The connectors snapped in solid as I would expect for a quality product . So far a great purchase .
Scott
1/3/2022
This product failed and it was a pain in the ass to get it all worked out as far as the warranty thing goes … understandable since people scam all the time but man , I wasn’t too happy about the process . The new one works fine and has worked fine and I will for sure be getting a backup unit so if it fails while I’m on the road I’m not stranded because of an easy to fix plug and play part . It was easy to install for me … it seems to be working great at this point and I take my trailer for a drive a few times a month to keep it all working .
Worked perfectly
Excellent product. I installed trailer hitch and trailer wiring harness by myself 2.25 hours. Etrailer 1st class. Fast shipping. No complaints at all.
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John G.
4/3/2015
Excellent. Moved from Georgia to SC with truck pulling UHaul. Did Great!
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Jose
10/12/2025
Its a really awesome product it was very easy to install and it works great