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Tekonsha
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2014 - 2021 Mazda Swift
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We know our products
Quality Products
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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: | 118587 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.55 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 | Style | Notes |
|---|---|---|---|
| 2014 - 2021 | Mazda Swift | Sedan · 4-Door | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |


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The 2014-2021 Mazda 6 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118587 (Part #TK118587) fits the following vehicles: 2014-2021 Mazda Swift. Always verify your specific year, make, and model before ordering.
Yes, the 2014-2021 Mazda 6 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118587 (Part #TK118587) is designed to fit the 2014-2021 Mazda Swift.
The 2014-2021 Mazda 6 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118587 (Part #TK118587) fits 2014-2021 Mazda Swift models. The 2021 model year is the last year covered by this part number. For newer models, check for an updated version.
The 2014-2021 Mazda 6 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118587 (Part #TK118587) Drilling is required for installation. Basic hand tools are typically all you need.
Yes, this T-Connector is designed for the Mazda 6. The installation instructions are specific to this vehicle model.
The T-Connector is a trailer lighting adapter that connects to your vehicle's taillight wiring harness to provide power for trailer lights. It includes a black box module that houses the electrical connections and a 4-flat connector for the trailer.
Required tools are: trim panel remover, 10 mm socket and ratchet or 10 mm wrench, drill with 3/32" bit, 1/4" socket, wire crimpers, wire cutters, Phillips head screwdriver, and test probe.
The T-Connector includes: three T-Connector harnesses (containing yellow, red, and green wires), a black box module, an eyelet and screw for grounding, two yellow butt connectors, a yellow fuse holder with a 10 amp fuse, cable ties, and a 4-flat connector for storage in the trunk when not in use.
Yes. You must disconnect the vehicle's negative (−) battery cable before connecting the fuse holder to the positive battery terminal. Reconnect the negative cable only after the fuse is installed in the fuse holder.
Open the trunk and remove the threshold panel. Partially remove the corner felt trunk liner on both sides to expose the vehicle's taillight wiring harness.
Behind each taillight housing, there are connection points matching the T-Connector adapter ends. On the driver's side, attach the T-Connectors containing the yellow and red wires. Ensure connectors are fully inserted with locking tabs in place. Route the T-Connector with the green wire below the threshold cover to the passenger's side taillight housing and repeat the connection process.
Yes. You must drill a 3/32" hole on the driver's side near the taillight connector to secure the white grounding wire using the eyelet and screw provided. Before drilling, verify what is behind the surface to avoid damage to the vehicle or personal injury, and do not drill into any exposed surfaces.
Drill a 3/32" hole on the driver's side near the taillight connector to secure the white grounding wire.
You have two options: (1) Route the black wire through a grommet and along the exterior frame, or (2) follow the existing wiring along the thresholds into the engine compartment and 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, or any other points that may pinch or break the wire.
The T-Connector includes three harnesses: yellow and red wires connect to the driver's side taillight housing, and the green wire connects to the passenger's side taillight housing. The white wire is the ground wire, secured to a grounding point on the driver's side. The black 12 gauge wire and red wire from the black box module connect to the battery circuit via the fuse holder.
The T-Connector uses a 10 amp fuse. This fuse is installed in the yellow fuse holder provided and must be connected between the vehicle's positive battery terminal and the black 12 gauge wire from the T-Connector black box module.
After disconnecting the vehicle's negative battery cable, 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 from the T-Connector black box using the yellow butt connector provided. Install the 10 amp fuse into the fuse holder, then reconnect the negative battery cable.
Do not exceed the lower of your towing manufacturer's rating or: maximum stop/turn light of 1 per side (2.1 amps) or maximum tail lights (5.6 amps). Overloading the circuit can cause fires. Consult your vehicle's owner's manual and the towing product instruction sheet for additional information.
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's electrical system by temporarily removing the key from the ignition.
Locate a flat surface in an out-of-the-way place inside the vehicle (typically the trunk area) and mount the black box module 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. After securing the harness, replace the carpet and any other clips or panels that were removed during installation, being careful not to cut or pinch the wires.
Store the 4-flat connector in the trunk area when not in use.
Yes, the T-Connector (118587-037) is designed for the Mazda 6.
You need: trim panel remover, 10 mm socket/ratchet or wrench, drill with 3/32" bit, 1/4" socket, wire crimpers, wire cutters, Phillips screwdriver, and test probe.
Yes, you must disconnect the vehicle's negative battery cable before connecting to the positive terminal, and reconnect it only after the fuse is installed.
The T-Connector uses a 10 amp fuse, which is provided and must be installed in the yellow fuse holder.
Do not exceed the lower of your towing manufacturer's rating or: 1 stop/turn light per side (2.1 amps) or tail lights (5.6 amps). Overloading can cause fires.

Ann
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