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2019 - 2025 Mazda Grand Vitara
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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: | 118808 |
| 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 |
|---|---|---|
| 2019 - 2025 | Mazda Grand Vitara | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
The 2019-2023 Mazda 3, 2019-2023 Mazda 3 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118808 (Part #TK118808) fits 2019-2025 Mazda Grand Vitara models. The 2025 model year is the last year covered by this part number. For newer models, check for an updated version.
The 2019-2023 Mazda 3, 2019-2023 Mazda 3 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118808 (Part #TK118808) fits the following vehicles: 2019-2025 Mazda Grand Vitara. Always verify your specific year, make, and model before ordering.
Yes, the 2019-2023 Mazda 3, 2019-2023 Mazda 3 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118808 (Part #TK118808) is designed to fit the 2019-2025 Mazda Grand Vitara.
The 2019-2023 Mazda 3, 2019-2023 Mazda 3 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118808 (Part #TK118808) Drilling is required for installation. Basic hand tools are typically all you need.
The T-One® Connector is a vehicle-to-trailer wiring interface that taps into your vehicle's taillight wiring harness to provide power for trailer lights. It uses a T-connector design that intercepts the factory wiring on both the driver's and passenger's sides of the trunk, allowing you to connect a 4-flat trailer connector without cutting or permanently modifying the vehicle's original wiring.
Yes, the T-One® Connector 118808-037 is designed for the Mazda 3 Sedan. The manual covers installation for this vehicle specifically. If you have a different Mazda 3 body style (coupe, hatchback) or model year, contact the manufacturer to confirm compatibility, as this manual does not cover those variants.
You will need: a trim panel remover, 10 mm socket and ratchet or 10 mm wrench, a drill with a 3/32" drill bit, wire crimpers, and wire cutters. These tools are required to remove trunk panels, disconnect battery terminals, drill the ground hole, and prepare wire connections.
The kit includes: double-sided tape for mounting the black box, cable ties for securing the harness, an eyelet and screw for the ground wire, a yellow fuse holder, a ring terminal, a yellow butt connector, and a 15 amp fuse. All of these items are provided and should not require separate purchase.
Yes. Step 7 requires you to disconnect the vehicle's negative (−) battery cable before making the final electrical connections to the positive battery terminal. After all wiring is complete and the fuse is installed, you reconnect the negative battery cable in step 8.
Open the trunk and remove the threshold panel. Then partially remove the corner felt trunk liner on both the driver's and passenger's sides to expose the vehicle's taillight wiring harness. Be careful when removing these panels to avoid damage.
On the driver's side, insert the T-One® Connector end with the yellow wire between the vehicle's wiring connectors and lock it into place. Repeat on the passenger's side with the T-One® Connector end with the green wire. Be careful not to damage the locking tabs and ensure connectors are fully inserted with locking tabs engaged. The connector taps into the factory harness without cutting wires.
Mount the T-One® black box on the driver's side using the double-sided tape provided. Secure the remainder of the harness with the cable ties provided, being careful to avoid areas that would cut or pinch the wire. Repeat the same mounting procedure on the passenger's side for the second connector end.
Route the T-One® Connector end with the green wire to the passenger's side behind the panels and along the threshold. Secure it with cable ties as you did on the driver's side, being careful to avoid pinching or cutting the wire.
Drilling is required only for the ground connection. You must locate a suitable grounding point near the connector, such as an existing ground stud, or drill a 3/32" hole to secure the white ground wire using the eyelet and screw provided. Do not drill into the vehicle floor or bed. Before drilling, verify what is behind the surface to avoid damage to the vehicle or personal injury.
Use a 3/32" drill bit to create the hole for the ground wire eyelet. This is the only drilling required during installation.
No. The manual explicitly states: do not drill into the vehicle floor or bed. You must locate an existing ground stud or drill only in areas that do not penetrate the floor or bed structure. Always verify what is behind any surface before drilling.
The T-One® Connector uses three wire colors: yellow (driver's side connector), green (passenger's side connector), and white (ground wire). The yellow and green wires tap into the vehicle's taillight wiring harness on each side. The white wire is the ground connection, secured to an existing ground stud or a drilled hole using an eyelet and screw.
Disconnect the vehicle's negative battery cable. Remove the fuse from the yellow fuse holder provided. Cut the fuse holder wire, attach the ring terminal to the vehicle's positive (+) battery cable, and secure it. Connect the other end of the fuse holder to the black 12 gauge wire using the yellow butt connector provided. Install the 15 amp fuse into the fuse holder. Reconnect the negative battery cable.
Install a 15 amp fuse into the fuse holder. This fuse protects the circuit and must be installed after all wiring connections are complete.
The black wire is 12 gauge (12 ga.). This wire connects the fuse holder to the T-One® Connector circuit.
Always wear safety glasses during installation. Read and follow all warnings and cautions printed on the tow vehicle's battery before beginning. Verify what is behind any surface before drilling to avoid damage to the vehicle or personal injury. Do not drill into exposed surfaces. Be careful not to damage the connector locking tabs or pinch and cut wires during installation and reassembly.
Do not exceed the lower of two ratings: the towing manufacturer's rating (including that in your vehicle owner's manual) or the specific amperage ratings stated on the product. The manual does not specify the product's own amperage rating; check the product label or contact the manufacturer for this information. Overloading circuits can cause fires.
After installation is complete, test and verify the installation with a test light or by connecting an actual trailer. For the initial test, reset the vehicle electrical system by temporarily removing the key from the ignition. All connections must be complete for the T-One® Connector to function properly.
Route the 4-flat connector through the driver's side trim panel into the storage compartment on the threshold and store it there when not in use. This keeps the connector protected and organized.
Reinstall the plastic trim panels, threshold, storage covers, floor covering, and any other items that were removed during installation. Be careful not to pinch or cut the wires when reinstalling these components.
Yes, you must disconnect the negative battery cable before making electrical connections to the positive battery terminal. Reconnect it after the fuse is installed.
A 15 amp fuse is required. It is installed in the yellow fuse holder provided after all wiring connections are complete.
Do not exceed the lower of the towing manufacturer's rating (in your vehicle owner's manual) or the product's amperage rating. The manual does not state the product's specific rating; check the product label or contact the manufacturer.
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Ordered online. Shipment arrived on time and with all the correct parts. Great customer service and friendly staff. Also, pricing was great!
May 22, 2023
Total for 4 items:
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