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2021 - 2025 Hyundai Elantra
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Tekonsha T-One connector (also referred to as T-Connector) wiring harnesses are the fastest and easiest way to add an electrical connector to the back of your vehicle. These connectors are used to link the wiring from your vehicle to the trailer when towing. Tekonsha T-One connectors feature custom designs to fit each vehicle make and model based on manufacturer specifications. Plus, the Plug & Play connectors on the end of the wires make it easy to install. No cutting or splicing!
Tekonsha offers the largest, most complete line of T-One connectors. To install a Tekonsha T-One wiring harness, simply locate your vehicle's wiring harness connector typically behind the vehicle taillight - unplug the connection and insert the T-Connector into the vehicle's harness. It's that easy! So what are you waiting for? Hit the road with the peace of mind only Tekonsha can provide. Life's a Journey. Stop Often.
| BRAND: | TEKONSHA |
| PART NUMBER: | 118834 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.65 LBS |
| UNIVERSAL OR SPECIFIC FIT: | SPECIFIC |
| CIRCUIT PROTECTED: | YES |
| HARNESS TYPE: | MALE FEMALE |
| TERMINAL QUANTITY: | 4 |
| WIRE COLORS: | BROWN, GREEN, YELLOW, WHITE |
| WIRE QUANTITY: | 4 |
| WIRE GAUGE: | 16 GA. |
| POWER LEAD REQUIRED: | YES |
| ELECTRICAL SYSTEM TYPE: | 3-WIRE SYSTEM |
| HARDWARE INCLUDED: | YES |
Tekonsha is a leading manufacturer of electronic trailer brake controllers, pioneering the category in the 1970s. The lineup spans proportional units such as the Prodigy P3 and Prodigy iD, time-delayed controllers, the wireless Prodigy RF, plus vehicle-specific wiring harnesses, adapters and trailer brake components engineered for smooth, predictable stopping at any speed.
Tekonsha Engineering Company began in 1964 building RV steps and mirrors. Within a few years it had found its real calling, and by the 1970s Tekonsha was pioneering the manufacture of electronic trailer brake controllers, the product category that still defines the brand. More than half a century later it remains the reference name in trailer braking and is part of the Horizon Global group alongside Reese, Draw-Tite, Fulton, Bulldog and Wesbar.
A brake controller is the component that tells a trailer's electric brakes how hard to work and when, and getting that right is the difference between a controlled stop and a shove from behind. Tekonsha builds both major types. Proportional controllers use an internal accelerometer to sense how quickly the tow vehicle is slowing and apply trailer braking to match, so light braking stays light and hard braking is immediate. Time-delayed controllers ramp to a preset output over a fixed interval, a simpler and more economical approach that suits occasional towing.
The current brake controller range covers most of that ground. The Prodigy iD pairs with a phone through Tekonsha's EDGE technology for setup and monitoring, the P3 offers storable settings for multiple trailers and a trilingual colour LED display, the Prodigy P2 adds a dimmable display and boost mode for heavier loads, and the Voyager keeps operation simple and dependable. The Prodigy RF mounts to the trailer itself and controls wirelessly, which suits rental fleets and drivers who swap tow vehicles.
Installation is supported by vehicle-specific brake control harnesses that plug into a factory connector rather than requiring cut-and-splice wiring, along with mounting brackets and adapters. Matched controller bundles pair a unit with the correct harness. Products are tested to meet and often exceed published industry standards.
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1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2021 - 2025 | Hyundai Elantra | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
The 2021-2023 Hyundai Elantra Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118834 (Part #TK118834) fits 2021-2025 Hyundai Elantra models. The 2025 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the 2021-2023 Hyundai Elantra Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118834 (Part #TK118834) is designed to fit the 2021-2025 Hyundai Elantra.
The 2021-2023 Hyundai Elantra Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118834 (Part #TK118834) fits the following vehicles: 2021-2025 Hyundai Elantra. Always verify your specific year, make, and model before ordering.
The 2021-2023 Hyundai Elantra Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118834 (Part #TK118834) Drilling is required for installation. Basic hand tools are typically all you need.
The manual shows installation on a Hyundai Elantra Sedan. Verify compatibility with your specific vehicle and model year before purchase, as the manual does not list all compatible vehicles.
The kit includes: a T-One Connector with yellow and green wire ends, a black 12 gauge power wire, a white ground wire with eyelet and screw, a yellow fuse holder with 15 amp fuse, a yellow butt connector, cable ties, and a 4-flat connector. The 4-flat connector should be stored in the rear cargo area when not in use.
Trim panel remover, 10 mm socket and ratchet or 10 mm wrench, drill with 3/32" bit, 1/4" socket, wire crimpers, wire cutters, Phillips head screwdriver, and test probe.
Yes. You must disconnect the vehicle's negative (−) battery cable before connecting the power wire to the positive battery terminal. This is done in step 7. Reconnect the negative cable in step 8 after the fuse holder is installed.
Yes. A 3/32" hole must be drilled to secure the white ground wire using the provided eyelet and screw. The manual cautions to verify what is behind any surface before drilling to avoid damage to the vehicle or personal injury, and prohibits drilling into the vehicle floor or bed.
Locate a suitable grounding point near the connector, such as the vehicle's frame or crossmember. Do not drill into the vehicle floor or bed. Clean dirt and rustproofing from the area before drilling the 3/32" hole. Secure the white wire using the eyelet and screw provided.
Open the trunk and temporarily remove the rear threshold plate. Partially remove the felt trunk liner behind the driver side taillight to access the taillight wiring harness. These panels must be replaced at the end of installation (step 11).
On the driver's side, locate the vehicle's taillight wiring harness and separate the connector carefully without breaking the locking tabs. Ensure all connector surfaces are clean and free of dirt. Insert the T-One Connector end with the yellow wire between the vehicle wiring connectors and lock into place. Route the green wire end to the passenger's side behind the panels and along the threshold, then plug it between the mating plugs on the passenger's side taillight socket and vehicle wiring harness.
Locate the black 12 gauge power wire from the T-Connector box on the driver's side. Route it along the exterior frame or follow existing wiring along the thresholds into the engine compartment up to the battery. Avoid areas that may pinch or break the wire. If routing through a grommet and along the exterior, carefully avoid hot pipes, heat shields, the fuel tank, or any other points that may pinch or break the wire.
Disconnect the vehicle's negative (−) battery cable first. Remove the fuse from the yellow fuse holder if not already removed. Cut the fuse holder wire and attach the ring terminal to the vehicle's positive (+) battery cable. Connect the other end of the fuse holder to the black 12 gauge wire using the yellow butt connector provided. Reconnect the negative battery cable and install the 15 amp fuse into the fuse holder.
Install a 15 amp fuse into the yellow fuse holder provided with the kit.
Mount the black box module on a flat surface in an out-of-the-way place to prevent damage or rattling.
Secure the remainder of the harness with the cable ties provided to prevent damage or rattling. Be careful to avoid any areas that would pinch, cut, or melt the wire. Do not pinch the harness in the door latch.
Store the 4-flat connector in the rear cargo area when not in use. When in use, pull the 4-flat connector through the door and close it. Be careful not to pinch the harness in the door latch.
All connections must be complete for the T-One T-Connector to function properly. Test and verify installation with a test light or trailer once installed. For the initial test, reset the vehicle electrical system by temporarily removing the key from the ignition.
Do not exceed the lower of the towing manufacturer's rating (including in your vehicle owner's manual) or the specific amperage ratings stated on the product. Overloading circuits can cause fires. Refer to the product label and your vehicle's owner's manual for the exact amperage limit.
Always wear safety glasses and use all safety precautions during installation. Read and follow all warnings and instructions printed on the tow vehicle's battery. Verify what is behind any surface before drilling to avoid damage to the vehicle or personal injury. Do not drill into exposed surfaces or the vehicle floor or bed.
Yes. All connector surfaces should be clean and free of dirt before connecting the T-One Connector. This ensures proper electrical contact.
Be careful not to break the locking tabs when separating the vehicle's taillight connector or inserting the T-One Connector ends. Ensure that connectors are fully inserted with locking tabs in place. If tabs are damaged, the connector may not lock properly and the installation will not be secure.
Verify that all connections are complete. The manual states that all connections must be complete for the T-One T-Connector to function properly. Test and verify installation with a test light or trailer. For the initial test, reset the vehicle electrical system by temporarily removing the key from the ignition. Check that the 15 amp fuse is installed in the fuse holder, the ring terminal is secured to the positive battery cable, the yellow butt connector is properly attached, and all taillight connectors are fully inserted with locking tabs in place.
Ensure that the connector surfaces are clean and free of dirt. Verify that you are fully inserting the connectors with the locking tabs in place. Be careful not to damage the locking tabs when separating or inserting the connectors. If the locking tabs are broken or bent, the connector will not lock properly.
The manual does not explicitly state that the spare tire or cargo floor must be removed during installation. However, step 1 requires partial removal of the felt trunk liner, and step 11 requires replacement of the spare tire cover and cargo floor hatch that were removed during installation. Assess your vehicle's layout to determine if removal is necessary for access to the taillight wiring.
Matt
The staff was able to quickly assist me with locating the correct product I needed. Shipping was really fast. Item arrived in 2 days. Will be using TowUniverse again!!
May 22, 2023
Total for 4 items:
$185.42$210.95
