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Tekonsha
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2015 - 2019 Subaru Legacy
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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: | 118671 |
| 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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The 2015-2019 Subaru Legacy Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118671 (Part #TK118671) fits the following vehicles: 2015-2019 Subaru Legacy. Always verify your specific year, make, and model before ordering.
The 2015-2019 Subaru Legacy Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118671 (Part #TK118671) fits 2015-2019 Subaru Legacy models. The 2019 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the 2015-2019 Subaru Legacy Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118671 (Part #TK118671) is designed to fit the 2015-2019 Subaru Legacy.
The 2015-2019 Subaru Legacy Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118671 (Part #TK118671) Drilling is required for installation. Basic hand tools are typically all you need.
The T-One® T-Connector is a trailer wiring harness that integrates with your vehicle's taillight wiring to provide trailer lighting connections. It uses a 4-flat connector that you store in the trunk when not in use. The system connects to your vehicle's existing taillight wiring on both the driver and passenger sides, allowing you to safely tow a trailer with integrated lighting.
Yes, the T-One® T-Connector part number 118671-037 is designed for the Subaru Legacy. The manual confirms this application.
You will need: a trim panel remover, a drill with a 3/32" drill bit, a Phillips head screwdriver, and a test-probe. These tools are required to remove interior panels, drill the ground wire hole, and verify electrical connections.
The kit includes: two T-Connector ends (one with yellow wire, one with green wire), a black box-module, cable ties, a white wire with eyelet and screw for grounding, a 15 amp fuse, a yellow fuse holder with wire, two yellow butt connectors, 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. This is a required safety step performed in step 7. After all other connections are complete, you reconnect the negative battery cable in step 8.
Open the trunk and temporarily remove the rear threshold plate. Partially remove the felt trunk liner behind the taillights. You will also need to remove interior panels and carpet to route the wiring harness from the taillights to the engine compartment and battery. These panels and carpet are reinstalled after installation.
Locate the taillight wiring harness on both the driver and passenger sides of the vehicle. The harness has a connection point on each side that matches the T-Connector ends. Separate the vehicle's connector carefully without breaking the locking tabs. Insert the T-Connector end with the yellow wire on the driver's side between the vehicle connectors and lock into place. Route the T-Connector end with the green wire to the passenger's side and repeat the process. Ensure all connector surfaces are clean and connectors are fully inserted with locking tabs in place.
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 any exposed surfaces. Clean dirt and rustproofing from the area first, then drill the hole and secure the white wire using the eyelet and screw provided.
From inside the vehicle, connect the black 12 gauge wire from the T-Connector black box to the vehicle's wiring using the supplied yellow butt connector. 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 any other points that may pinch or break the wire.
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 terminal. Connect the other end of the fuse holder to the black 12 gauge wire using the supplied yellow butt connector. The fuse holder contains a 15 amp fuse, which you install after reconnecting the negative battery cable.
The system uses a 15 amp fuse installed in the yellow fuse holder provided. This fuse is installed after all other connections are complete and the negative battery cable is reconnected.
The T-Connector uses: yellow wire (driver's side taillight connection), green wire (passenger's side taillight connection), white wire (ground connection secured with eyelet and screw), and black wire (12 gauge, connects to vehicle battery positive terminal through the fuse holder). The black wire from the T-Connector black box also connects to the vehicle's wiring using a yellow butt connector.
Do not exceed the lower of your towing manufacturer's rating or: maximum stop/turn light 2 per side (4.2 amps total), or maximum tail lights (7.5 amps total). Overloading the circuit can cause fires. Consult your vehicle's owner's manual and the T-Connector instruction sheet for additional information on your specific towing capacity.
All connections must be complete for the T-One® T-Connector to function properly. Test and verify the installation with a test light or trailer once installed. For the initial test, reset the vehicle's electrical system by temporarily removing the key from the ignition. This ensures all connections are working correctly before towing.
Locate a flat surface in an out-of-the-way place inside the vehicle and mount the black box-module there. This prevents damage or rattling during vehicle operation.
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. This protects it from damage and keeps it readily available when you need to tow a trailer.
Yes, the T-One® T-Connector part number 118671-037 is designed for the Subaru Legacy.
You need a trim panel remover, drill with 3/32" bit, Phillips head screwdriver, and test-probe.
Yes, you must drill a 3/32" hole for the ground wire. Verify what is behind the surface before drilling to avoid damage.
Yes, disconnect the negative battery cable before connecting to the positive terminal. Reconnect it after all other connections are complete.
The system uses a 15 amp fuse installed in the yellow fuse holder provided with the kit.
Do not exceed 2 stop/turn lights per side (4.2 amps) or 7.5 amps for tail lights. Do not exceed your vehicle's towing manufacturer rating.
Test with a test light or trailer after installation. Reset the electrical system by temporarily removing the ignition key to verify all connections work properly.
Store the 4-flat connector in the trunk area when not in use.
All connections must be complete for the T-One® T-Connector to function properly. Verify that: (1) both taillight connectors are fully inserted with locking tabs in place, (2) the white ground wire is securely fastened, (3) the black 12 gauge wire is properly connected to the vehicle's wiring and battery through the fuse holder, (4) the 15 amp fuse is installed in the fuse holder, and (5) the negative battery cable is reconnected. Test the installation with a test light or trailer. If the system still does not function, reset the vehicle's electrical system by temporarily removing the key from the ignition.
1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2015 - 2019 | Subaru Legacy | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
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