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Tekonsha
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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: | 118841 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 0.3 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: | NO |
| ELECTRICAL SYSTEM TYPE: | 2-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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The 2021-2023 Buick Envision Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118841 (Part #TK118841) fits the following vehicles: 2021-2025 Buick Envision. Always verify your specific year, make, and model before ordering.
The 2021-2023 Buick Envision Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118841 (Part #TK118841) fits 2021-2025 Buick Envision 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 Buick Envision Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118841 (Part #TK118841) is designed to fit the 2021-2025 Buick Envision.
The 2021-2023 Buick Envision Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118841 (Part #TK118841) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The T-One® Connector is a trailer harness adapter that connects to your vehicle's factory trailer harness connector. It provides a 4-Flat connector end for towing applications. The connector must be fully connected and all connections completed for it to function properly.
The factory trailer harness connector is located under the vehicle, behind the rear bumper, between the driver's side and center of the vehicle. It will have a protective cap matching the end of the T-One® Connector. The connector may not be visible until the rear fascia is removed.
The T-One® Connector is designed for tow vehicles with a factory trailer harness connector. The manual shows a Buick Envision as an example application. Compatibility with other vehicle models is not specified in the manual. Consult the manufacturer or a fitment database to confirm compatibility with your specific vehicle.
You will need a trim panel puller and a test-probe. These are listed as required tools in the installation instructions.
The T-One® Connector includes the connector harness, a 4-Pin Tow-Plug Adapter, and cable ties for securing the harness. A bracket or electrical box for mounting the 4-Flat end is not included and must be obtained separately.
The manual shows a photo with the rear fascia removed for clarity, but does not explicitly state that removal is required. The factory trailer harness connector is located behind the rear bumper between the driver's side and center of the vehicle. You may need to remove or partially remove the rear fascia to access it, depending on your vehicle.
1. Remove the protective cap from the factory connector and store it in the glove compartment with the installation instructions. 2. Check that the mating surfaces of both connectors are free of dirt and clean if necessary. 3. Insert the 4-Pin Tow-Plug Adapter into the factory connector and lock it into place. 4. Ensure that the connectors are fully inserted with locking tabs in place.
Route the T-Connector harness rearward to the back of the bumper fascia. Secure the harness with the cable ties provided, being careful to avoid any areas that would pinch, cut or melt the wire. This prevents damage, rattling, and potential electrical hazards.
Mount the 4-Flat end in an accessible location using a bracket or electrical box. The bracket or electrical box is not included with the product and must be obtained separately.
All connections must be complete for the T-One® Connector to function properly. Test and verify the 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.
The manual states that you must not exceed the lower of the towing manufacturer rating (including in your vehicle owner's manual) or the specific amperage ratings stated on the product. The specific amperage rating is not provided in this manual. Check the product label and your vehicle's owner's manual for the exact amperage rating.
Yes. Overloading circuits can cause fires. Do not exceed the stated product ratings or the lower of the towing manufacturer rating (including in your vehicle owner's manual) or the specific amperage ratings stated on the product. Always read and follow all warnings and instructions included with the product and in your vehicle's owner's manual.
Always wear safety glasses during installation. Use all safety precautions. Read, understand and follow all warnings and instructions printed on the tow vehicle's battery. Read and follow all warnings and instructions included with the product before beginning installation. Keep the instructions for future reference.
The T-One® Connector fits tow vehicles with a factory trailer harness connector located under the vehicle behind the rear bumper. Confirm your vehicle has this connector before purchasing. The manual shows a Buick Envision as an example.
You need a trim panel puller and a test-probe. A bracket or electrical box for mounting the 4-Flat end is not included.
The manual does not mention drilling, cutting, trimming, grinding, welding or bending. Installation involves connecting the adapter to the factory harness and routing the harness with cable ties.
Do not exceed the lower of the towing manufacturer rating in your vehicle owner's manual or the specific amperage ratings stated on the product. Check your vehicle's manual and the product label for exact ratings.
1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2021 - 2025 | Buick Envision | Tow Harness T: Connector Assembly Uses all existing holes. No Drilling required Install Time is 10 minutes |
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$75.95
George
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
