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Tekonsha
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2017 - 2021 Mazda CX-5
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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: | 118746 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 2 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 |
|---|---|---|
| 2017 - 2021 | Mazda CX-5 | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
The 2017-2021 Mazda CX-5 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118746 (Part #TK118746) fits 2017-2021 Mazda CX-5 models. The 2021 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the 2017-2021 Mazda CX-5 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118746 (Part #TK118746) is designed to fit the 2017-2021 Mazda CX-5.
The 2017-2021 Mazda CX-5 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118746 (Part #TK118746) fits the following vehicles: 2017-2021 Mazda CX-5. Always verify your specific year, make, and model before ordering.
The 2017-2021 Mazda CX-5 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118746 (Part #TK118746) Drilling is required for installation. Basic hand tools are typically all you need.
Yes, this T-Connector is designed for the Mazda CX-5. It connects to the vehicle's taillight wiring harness located inside the access panels on both the driver and passenger sides of the vehicle.
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.
Yes. Disconnect the vehicle's negative (−) battery cable before connecting the power wire to the positive battery terminal. Reconnect the negative cable only after the fuse holder and 15 amp fuse are installed.
Yes. A 3/32" hole must be drilled into a suitable grounding point (vehicle frame or crossmember, not the floor or bed) to secure the white ground wire using the provided eyelet and screw. Verify what is behind the surface before drilling.
A 15 amp fuse must be installed in the yellow fuse holder provided. This fuse is connected between the black 12 ga. power wire and the vehicle's positive battery terminal.
Do not exceed the lower of the towing manufacturer's rating (in your vehicle owner's manual) or the product's amperage rating. Overloading circuits can cause fires. Wear safety glasses during installation and verify what is behind any surface before drilling.
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.
The T-Connector (part 118746-037) is a T-One® electrical connector that integrates into the Mazda CX-5's taillight wiring harness to provide a connection point for trailer lighting. It uses a black box module and includes a 4-flat connector for trailer use.
The kit includes the T-Connector harness with yellow and green wire ends, a black box module, a white ground wire with eyelet and screw, a black 12 ga. power wire, a yellow fuse holder with 15 amp fuse, a yellow butt connector, cable ties, and a 4-flat connector for storage in the spare tire compartment.
The manual specifies this T-Connector (part 118746-037) is designed for the Mazda CX-5 only. Use with other vehicles is not supported by this manual.
Open the tailgate and remove the cargo door on the floor. Carefully remove the floor trim panels and access panels on each side of the vehicle. The taillight wiring harness is located inside the access panel area on both the driver and passenger sides.
Locate the vehicle's taillight wiring harness on both the driver and passenger sides. Separate the connector carefully, avoiding damage to the locking tabs. Ensure all connector surfaces are clean and free of dirt before inserting the T-Connector ends.
On the driver's side, insert the T-Connector end with the yellow wire between the vehicle wiring connectors and lock into place, ensuring the locking tabs are fully engaged. On the passenger's side, repeat this process using the T-Connector end with the green wire. Be careful not to damage the locking tabs.
Route the T-Connector end with the green wire through the trim panel access hole on the driver's side, across the threshold, and through the passenger trim panel access hole. This allows the connector to reach both the driver and passenger side taillight harnesses.
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, then drill a 3/32" hole and secure the white wire using the provided eyelet and screw.
Verify what is behind any surface prior to drilling to avoid damage to the vehicle and personal injury. Do not drill into any exposed surfaces. Clean the area thoroughly to remove dirt and rustproofing before drilling the 3/32" hole.
Locate the black 12 ga. power wire from the T-Connector box on the driver's side. Attach the black 12 ga. wire provided. Route the black wire along the exterior frame or follow existing wiring along the thresholds into the engine compartment up to the battery, avoiding areas that may pinch or break the wire.
Avoid hot pipes, heat shields, the fuel tank, and any other points that may pinch or break the wire. If routing the wire through a grommet and along the exterior of the vehicle, exercise extra care to prevent damage.
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, attach the ring terminal, and secure it to the vehicle's positive (+) battery cable. Connect the other end of the fuse holder to the black 12 ga. wire using the yellow butt connector provided.
The T-Connector uses yellow wire on the driver's side connector end, green wire on the passenger's side connector end, white wire for grounding, and black 12 ga. wire for the positive power connection to the battery.
The yellow butt connector is used to join the fuse holder wire to the black 12 ga. power wire that connects to the vehicle's positive battery terminal.
Mount the T-One® T-Connector's black box module on a flat surface in an out-of-the-way place to prevent damage or rattling.
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.
Store the 4-flat connector in the spare tire compartment when not in use.
After reconnecting the vehicle's negative (−) battery cable and installing the 15 amp fuse into the fuse holder, test and verify the installation with a test light or trailer. For the initial test, reset the vehicle electrical system by temporarily removing the key from the ignition.
Read and follow all warnings and cautions printed on the tow vehicle's battery. Always read, understand, and follow all warnings and instructions printed on the tow vehicle's battery before beginning installation.
Overloading circuits can cause fires. Do not exceed the stated product ratings or the lower of the towing manufacturer's rating (including in your vehicle owner's manual) or the specific amperage ratings stated on the product.
Always wear safety glasses and use all safety precautions during installation.
Verify that all connections are complete. Test and verify the installation with a test light or trailer. For the initial test, reset the vehicle electrical system by temporarily removing the key from the ignition. Ensure the 15 amp fuse is installed in the fuse holder, the negative battery cable is reconnected, and all connector locking tabs are fully engaged.
Ensure the connectors are fully inserted and the locking tabs are properly aligned. Do not force the connectors. If the locking tabs are damaged, do not proceed with installation as this will prevent proper electrical contact. Verify that you are using the correct T-Connector end (yellow wire on driver's side, green wire on passenger's side).
Total for 3 items:
$75.95
Matt
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
