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Tekonsha
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2020 - 2023 Buick Encore GX
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2021 - 2025 Chevrolet Trailblazer
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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: | 118846 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.75 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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2 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2020 - 2023 | Buick Encore GX | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2021 - 2025 | Chevrolet Trailblazer | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes With LED Taillights |
The 2020-2023 Buick Encore GX, 2021-2023 Chevrolet Trailblazer Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118846 (Part #TK118846) fits the following vehicles: 2020-2023 Buick Encore GX; 2021-2025 Chevrolet Trailblazer. Always verify your specific year, make, and model before ordering.
Yes, the 2020-2023 Buick Encore GX, 2021-2023 Chevrolet Trailblazer Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118846 (Part #TK118846) is designed to fit the 2020-2023 Buick Encore GX.
The 2020-2023 Buick Encore GX, 2021-2023 Chevrolet Trailblazer Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118846 (Part #TK118846) fits 2020-2023 Buick Encore GX models. The 2025 model year is the last year covered by this part number. For newer models, check for an updated version.
The 2020-2023 Buick Encore GX, 2021-2023 Chevrolet Trailblazer Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118846 (Part #TK118846) Drilling is required for installation. Basic hand tools are typically all you need.
The T-One® T-Connector is a vehicle wiring integration module that connects to your vehicle's taillight harness to enable trailer lighting control. It includes a black box module, wiring harness with yellow and green connectors for the driver and passenger sides, a white ground wire, a black 12 gauge power wire, a 15 amp fuse holder, and a 4-Flat connector for the trailer. The system allows your vehicle's electrical system to control trailer lights.
The manual shows installation on a Chevrolet Trailblazer with LED taillights as an example. However, the manual does not specify which other vehicles are compatible or provide a complete compatibility list. Contact the manufacturer or check the product fitment database to confirm compatibility with your specific vehicle make, model, year, and taillight configuration before purchasing.
You will need: 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 a test probe. Safety glasses are also required during installation.
The kit includes: a black box module, yellow and green T-Connector ends for driver and passenger sides, a white ground wire with eyelet and screw, a black 12 gauge power wire, 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.
Yes. You must disconnect the vehicle's negative (−) battery cable before connecting the power wire to the positive battery terminal in step 8. After all wiring connections are complete and the fuse is installed, reconnect the negative battery cable in step 9.
You must temporarily remove the rear hatch, rear threshold plate, privacy screen, storage covers, and floor covering. Open the rear door and fold the rear seat forward. Then partially remove the rear interior trim panels on both the driver and passenger sides. Set aside all removed items carefully to avoid damage. These items are reinstalled in step 12.
On the driver's side, locate the vehicle's taillight wiring harness connector and separate it carefully without breaking the locking tabs. Insert the T-Connector end with the yellow wire between the vehicle wiring connectors and lock into place, ensuring full insertion with locking tabs engaged. Route the connector with the green wire down the threshold to the passenger side and repeat the process with the green-wire T-Connector end. Ensure all connector surfaces are clean and free of dirt before insertion.
Yes. You must drill a 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 into any exposed surfaces. Choose a suitable grounding point near the connector on the vehicle's frame or crossmember, clean away dirt and rustproofing, then drill the hole and secure the white wire using the eyelet and screw provided.
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 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, and any other points that may pinch or break the wire.
The T-Connector uses a 15 amp fuse. The fuse is installed in the yellow fuse holder provided in the kit. The fuse holder is connected between the black 12 gauge power wire and the vehicle's positive battery terminal using the yellow butt connector provided.
After disconnecting the negative battery cable, 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.
Mount the black box module on a flat surface in an out-of-the-way location to prevent damage or rattling. The exact location is not specified in the manual; choose a location that is accessible but protected from impact and vibration.
Secure the remainder of the T-Connector 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. The 4-Flat connector should be stored in the rear cargo area when not in use; when in use, pull it through the door and close the door carefully.
All connections must be complete for the T-Connector to function properly. Test and verify the installation with a test light or by connecting a trailer once installed. For the initial test, reset the vehicle electrical system by temporarily removing the key from the ignition. This allows the system to reinitialize and verify proper operation.
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. The manual does not specify the product's maximum amperage rating; refer to the product label or contact the manufacturer for this specification. Overloading circuits can cause fires.
Always wear safety glasses during installation. Read and follow all warnings and instructions included with the product before beginning. Follow all warnings and cautions 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 the vehicle floor, bed, or exposed surfaces. Avoid pinching, cutting, or melting the harness during routing and securing.
After securing the harness and mounting the black box module, replace both access panels, spare tire cover, cargo floor hatch, and cargo nets that were removed during installation. Verify all connections are complete and test the installation with a test light or trailer. Reset the vehicle electrical system by temporarily removing the key from the ignition to verify proper operation.
Trim panel remover, 10 mm socket and ratchet or wrench, drill with 3/32" bit, 1/4" socket, wire crimpers, wire cutters, Phillips screwdriver, test probe, and safety glasses.
Yes. Disconnect the negative battery cable before connecting the power wire to the positive terminal. Reconnect after all wiring is complete and the 15 amp fuse is installed.
15 amp fuse. Install in the yellow fuse holder provided after all connections are complete and the negative battery cable is reconnected.
Black 12 gauge wire. Route it from the T-Connector box along the frame or existing wiring to the battery, avoiding hot pipes, heat shields, fuel tank, and pinch points.
Do not exceed the lower of the towing manufacturer's rating or the specific amperage rating stated on the product. The manual does not specify the product's maximum amperage; refer to the product label.
Verify that all connections are complete. Ensure the T-Connector ends are fully inserted into the vehicle's taillight harness connectors with locking tabs engaged on both driver and passenger sides. Confirm the black power wire is properly connected to the vehicle's positive battery terminal through the fuse holder and yellow butt connector. Verify the white ground wire is securely fastened to the frame or crossmember. Check that the 15 amp fuse is installed in the fuse holder. Reset the vehicle electrical system by temporarily removing the ignition key, then test with a test light or trailer.
Ensure the connector surfaces are clean and free of dirt before insertion. Separate the vehicle's taillight harness connector carefully without breaking the locking tabs. Insert the T-Connector end fully between the vehicle wiring connectors until the locking tabs engage. If the locking tabs are damaged, do not force the connection. Inspect both the vehicle connector and T-Connector end for damage or debris and clean as needed.
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