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Tekonsha
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2012 - 2016 Subaru Impreza
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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: | 118573 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.7 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 |
|---|---|---|
| 2012 - 2016 | Subaru Impreza | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
Yes, the Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Circuit Protected ModuLite Module TK118573 (Part #TK118573) is designed to fit the 2012-2016 Subaru Impreza.
The Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Circuit Protected ModuLite Module TK118573 (Part #TK118573) fits 2012-2016 Subaru Impreza models. The 2016 model year is the last year covered by this part number. For newer models, check for an updated version.
The Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Circuit Protected ModuLite Module TK118573 (Part #TK118573) fits the following vehicles: 2012-2016 Subaru Impreza. Always verify your specific year, make, and model before ordering.
The Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Circuit Protected ModuLite Module TK118573 (Part #TK118573) Drilling is required for installation. Basic hand tools are typically all you need.
The T-Connector is a wiring adapter that allows you to connect a trailer to your vehicle's electrical system. It interfaces with your vehicle's existing taillight wiring to provide power and ground connections for trailer lights. The product includes a black box control unit, a 4-Flat connector for the trailer, wiring harness with colour-coded wires (yellow, brown, green, white, black, and red), cable ties, double-sided tape, a fuse holder with yellow butt connectors, and an eyelet with screw for grounding.
The T-Connector is designed for the Subaru Impreza Sport. The manual does not specify compatibility with other vehicles or model years. Verify your vehicle matches this specification before purchasing.
You will need: 10mm socket and ratchet or 10mm wrench; trim panel remover; drill with 3/32" drill bit; 1/4" socket; wire crimpers; wire cutters; Phillips head screwdriver; and test probe. Safety glasses are also required.
The T-Connector includes: a black box control unit; a 4-Flat connector; colour-coded wiring harness (yellow, brown, green, white, black, and red wires); cable ties; double-sided tape for mounting the black box; a yellow fuse holder with fuse; yellow butt connectors; an eyelet and screw for the ground connection; and a ring terminal for the battery connection.
Yes. You must disconnect the vehicle's negative (−) battery cable before connecting the T-Connector to the positive battery terminal. This is a required safety step performed in step 7 of the installation.
Yes. You must remove the taillight assemblies on both the driver and passenger sides of the vehicle to access the wiring connectors behind them. This is the first step of the installation process.
1. Remove the taillight assemblies on both sides. 2. Behind each taillight, separate the vehicle's wiring connectors carefully without breaking the locking tabs. 3. On the driver's side, attach both ends of the T-Connector containing the yellow and brown wires to the vehicle's connectors. 4. Route the T-Connector end with the green wire down through the opening between the bumper and body. 5. Route the harness with the green wire underneath the vehicle to the passenger's side taillight pocket and repeat the connection with the green wire ends. Ensure all connectors are fully inserted with locking tabs in place.
Yes. You must drill one 3/32" hole on the driver's side near the taillight connectors to secure the white ground wire with the supplied eyelet and screw. Before drilling, verify what is behind the surface to avoid damage to the vehicle or personal injury. Do not drill into any exposed surfaces.
Drill a 3/32" hole on the driver's side near the taillight connectors to secure the white ground wire with the supplied eyelet and screw.
From inside the vehicle, connect the black 12 gauge wire and red wire from the T-Connector black box using the supplied yellow butt connector. Then route the black wire either through a grommet and along the exterior frame, or follow the 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, or other points that may pinch or break the wire.
The T-Connector uses colour-coded wires as follows: yellow and brown wires connect to the vehicle's taillight connectors on both sides; green wire connects to the vehicle's taillight connectors on the passenger side; white wire is the ground connection (secured with eyelet to a grounding point on the driver's side); black 12 gauge wire connects to the vehicle's positive battery terminal via the fuse holder; and red wire connects from the T-Connector black box to the battery circuit via the yellow butt connector.
1. Disconnect the vehicle's negative (−) battery cable. 2. Remove the fuse from the yellow fuse holder if not already removed. 3. Cut the fuse holder wire and attach the ring terminal to the vehicle's positive (+) battery cable. 4. Connect the other end of the fuse holder to the black 12 gauge wire using the supplied yellow butt connector. The black wire and red wire from the T-Connector black box are connected together using a yellow butt connector before routing to the battery.
The yellow fuse holder is a protective component supplied with the T-Connector. It contains a fuse and is connected between the black 12 gauge wire and the vehicle's positive battery terminal. To install it: disconnect the negative battery cable, remove the fuse from the holder if not already removed, cut the fuse holder wire, attach the ring terminal to the vehicle's positive battery cable, and connect the other end of the fuse holder to the black 12 gauge wire using the supplied yellow butt connector. This protects the circuit from overload.
Secure the T-Connector harness using the cable ties provided. Route the harness carefully to avoid areas that would pinch, cut, or melt the wire. After connecting all wiring, mount the T-Connector black box on the driver's side using the double-sided tape provided. Secure the remainder of the harness with additional cable ties, being careful to avoid any areas that could cut or pinch the wire.
Mount the T-Connector black box on the driver's side using the double-sided tape provided. Secure it after all wiring connections are complete and the harness has been routed.
After installation is complete, test and verify the installation using a test light or by connecting an actual trailer. For the initial test, reset the vehicle's electrical system by temporarily removing the key from the ignition. All connections must be complete for the T-Connector to function properly. Ensure all wiring is secure and no wires are pinched or cut before testing.
Always wear safety glasses during installation. Read and follow all warnings and cautions printed on the tow vehicle's battery. Do not exceed the stated product ratings or the lower of the towing manufacturer rating (including in your vehicle owner's manual) or specific amperage ratings stated on the product. Overloading circuits can cause fires. Before drilling, verify what is behind any surface to avoid damage to the vehicle or personal injury. Do not drill into exposed surfaces. If routing wire through a grommet and along the exterior, avoid hot pipes, heat shields, the fuel tank, or other points that may pinch or break the wire.
The manual does not specify the exact amperage rating of the T-Connector. However, 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 itself. Overloading circuits can cause fires. Refer to the product label and your vehicle's owner's manual for the specific amperage rating.
Store the 4-Flat connector in the trunk area of your vehicle when not in use.
Yes. After all T-Connector wiring is connected and secured, reinstall the taillight assemblies and any other items removed during installation. Be careful not to pinch or cut the wires when reinstalling.
The T-Connector is designed for the Subaru Impreza Sport. Verify your vehicle matches this specification before purchasing.
Yes, you must disconnect the vehicle's negative battery cable before connecting the T-Connector to the positive battery terminal.
Do not exceed the lower of the towing manufacturer rating or the specific amperage ratings stated on the product. Refer to the product label and your vehicle's owner's manual for the exact rating.
Verify that all connections are complete. The manual states that all connections must be complete for the T-Connector to function properly. Check that: (1) the T-Connector ends are fully inserted into the vehicle's taillight connectors with locking tabs in place on both driver and passenger sides; (2) the white ground wire is securely fastened with the eyelet and screw; (3) the black 12 gauge wire and red wire are properly connected with the yellow butt connector; (4) the fuse holder is correctly connected to the positive battery terminal and the black wire; (5) the negative battery cable is reconnected. After verifying all connections, reset the vehicle's electrical system by temporarily removing the ignition key, then test with a test light or trailer.
Do not use the T-Connector if wires are pinched or damaged. Pinched or damaged wires can cause electrical shorts, fires, or loss of trailer lighting. Reroute the harness using the cable ties provided to avoid areas that would pinch, cut, or melt the wire. If wires are already damaged, contact the manufacturer for a replacement harness before proceeding with installation.
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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
