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Tekonsha
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2021 - 2024 Kia K5
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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: | 118837 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.6 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 - 2024 | Kia K5 | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
The 2021-2024 KIA K5 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118837 (Part #TK118837) fits 2021-2024 Kia K5 models. The 2024 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the 2021-2024 KIA K5 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118837 (Part #TK118837) is designed to fit the 2021-2024 Kia K5.
The 2021-2024 KIA K5 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118837 (Part #TK118837) fits the following vehicles: 2021-2024 Kia K5. Always verify your specific year, make, and model before ordering.
The 2021-2024 KIA K5 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118837 (Part #TK118837) Drilling is required for installation. Basic hand tools are typically all you need.
The T-One® T-Connector is a trailer wiring harness interface that connects between your vehicle's taillight wiring and a trailer connector. It allows you to safely power trailer lights by tapping into your vehicle's existing taillight circuits. The system includes a black box module, wiring harness with yellow and green connector ends, a 4-flat trailer connector, ground wire, power wire, fuse holder, and cable ties.
The manual shows installation on a Kia K5 Sedan but does not provide a complete list of compatible vehicles. To confirm fitment for your specific vehicle, contact the manufacturer or consult a fitment database, as compatibility depends on taillight wiring harness design and trunk access.
Required tools are: trim panel remover, 10 mm socket and ratchet or 10 mm wrench, drill with 3/32" drill bit, 1/4" socket, wire crimpers, wire cutters, Phillips head screwdriver, and test probe. You will also need safety glasses.
The kit includes: two T-Connector ends (one with yellow wire, one with green wire), black 12 gauge power wire, white ground wire, eyelet and screw for grounding, yellow fuse holder with 15 amp fuse, yellow butt connector, 4-flat trailer connector, black box module, and cable ties.
Yes. You must disconnect the vehicle's negative (−) battery cable before connecting the power wire to the positive battery terminal in step 7. After all connections are made, reconnect the negative battery cable and install the 15 amp fuse.
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. You may also need to remove access panels, spare tire cover, cargo floor hatch, and cargo nets, which must be replaced at the end of installation.
On the driver's side, locate the taillight wiring harness connector. Separate the connector carefully without breaking the locking tabs. Clean all connector surfaces. Insert the T-Connector end with the yellow wire between the vehicle's wiring connectors and lock it in place, ensuring locking tabs are fully engaged. Route the green-wire end to the passenger side behind panels and along the threshold, then plug it between the passenger-side taillight socket and vehicle wiring harness.
Yes. You must drill one 3/32" hole to secure the white ground wire. Before drilling, verify what is behind the surface to avoid damage to the vehicle or personal injury. Do not drill into the vehicle floor or bed, and do not drill any exposed surfaces. Choose a suitable grounding point on the vehicle's frame or crossmember near the connector.
Drill a 3/32" hole. Locate a suitable grounding point on the vehicle's frame or crossmember near the connector. Clean dirt and rustproofing from the area before drilling. Do not drill into the vehicle floor or bed.
The system uses a 15 amp fuse. The fuse holder is provided with the kit. Install the 15 amp fuse into the fuse holder after reconnecting the vehicle's negative battery cable.
Locate the black 12 gauge power wire from the T-Connector box on the driver's side. Route the black wire along the exterior frame or follow existing wiring along thresholds into the engine compartment up to the battery, avoiding areas that may pinch or break the wire. Disconnect the negative battery cable. 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.
The T-Connector has three main wires: yellow (driver-side taillight connection), green (passenger-side taillight connection), and white (ground wire). The black 12 gauge power wire is routed from the T-Connector box to the vehicle's positive battery terminal through a fuse holder.
Locate a suitable grounding point near the connector on the vehicle's frame or crossmember. Do not use the vehicle floor or bed. Clean dirt and rustproofing from the area. Drill a 3/32" hole and secure the white ground wire using the eyelet and screw provided.
Route the black 12 gauge power wire 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 of the vehicle, carefully avoid hot pipes, heat shields, the fuel tank, or any other points that may pinch or break the wire.
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, being careful to avoid any areas that would pinch, cut, or melt the wire.
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 the door. Be careful not to pinch the harness in the door latch.
All connections must be complete for the 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. Consult the product labelling and your vehicle's owner's manual for the exact amperage limit.
Always wear safety glasses and use all safety precautions during installation. Before drilling, verify what is behind any surface to avoid damage to the vehicle or personal injury. Do not drill into exposed surfaces. Read and follow all warnings and cautions printed on the tow vehicle's battery. Do not pinch the harness in the door latch.
The manual shows installation on a Kia K5 Sedan. For other vehicles, contact the manufacturer or consult a fitment database to confirm compatibility.
Yes, disconnect the negative battery cable before connecting the power wire to the positive terminal. Reconnect it after all connections are complete and the 15 amp fuse is installed.
15 amp fuse. The fuse holder is provided with the kit.
Do not exceed the lower of the towing manufacturer's rating or the specific amperage ratings stated on the product. Consult the product label and vehicle owner's manual.
Verify that all connections are complete. The manual states: 'All connections must be complete for the T-One® T-Connector to function properly.' Check that the yellow and green connector ends are fully inserted with locking tabs in place on both driver and passenger sides. Verify the white ground wire is securely fastened with the eyelet and screw. Confirm the black power wire is connected to the positive battery terminal through the fuse holder and that the 15 amp fuse is installed. Test with a test light or trailer and reset the vehicle electrical system by temporarily removing the key from the ignition.
A repeatedly blown 15 amp fuse indicates an electrical overload or short circuit. Verify that you are not exceeding the product's amperage rating or the towing manufacturer's rating (whichever is lower). Check that the black power wire is not damaged, pinched, or touching any hot surfaces, heat shields, or the fuel tank. Inspect all connector connections to ensure they are clean, fully inserted, and not corroded. If the fuse continues to blow, there may be a wiring fault; discontinue use and consult the manufacturer.
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May 22, 2023
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