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Tekonsha
On Sale Today
Original price was $106.25. Current price is $88.70.2006 - 2012 Toyota RAV4
Confirmed to Fit
2008 - 2010 Toyota Sequoia
Confirmed to Fit


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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: | 118412 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.13 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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2 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2006 - 2012 | Toyota RAV4 | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2008 - 2010 | Toyota Sequoia | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
Yes, the 2008-2010 Toyota Sequoia, 2006-2012 Toyota RAV4 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118412 (Part #TK118412) is designed to fit the 2006-2012 Toyota RAV4.
The 2008-2010 Toyota Sequoia, 2006-2012 Toyota RAV4 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118412 (Part #TK118412) fits 2006-2012 Toyota RAV4 models. The 2012 model year is the last year covered by this part number. For newer models, check for an updated version.
The 2008-2010 Toyota Sequoia, 2006-2012 Toyota RAV4 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118412 (Part #TK118412) fits the following vehicles: 2006-2012 Toyota RAV4; 2008-2010 Toyota Sequoia. Always verify your specific year, make, and model before ordering.
The 2008-2010 Toyota Sequoia, 2006-2012 Toyota RAV4 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118412 (Part #TK118412) Drilling is required for installation. Basic hand tools are typically all you need.
The T-Connector is a taillight wiring integration harness that allows you to connect trailer lighting to your vehicle's factory taillight system. It uses T-shaped connectors to tap into the vehicle's existing taillight wiring (yellow, brown, and green wires for stop/turn and tail lights) and routes power through a converter box to a 4-flat trailer connector, which is stored in the driver-side storage compartment when not in use.
The manual does not specify vehicle make, model, year, bed length, or cab style. Contact the manufacturer or your retailer to confirm fitment for your specific vehicle before purchasing.
You will need: a trim panel remover, a Phillips head screwdriver, a drill with a 3/32" drill bit, a 10 mm wrench, and a 12 mm wrench.
The T-Connector kit includes: T-shaped connectors with yellow, brown, and green wires; a black converter box; a white wire with eyelet and screw for grounding; a 12 ga. black power wire; a yellow fuse holder with a 10 amp fuse; a yellow butt connector; cable ties; and double-sided tape for mounting the converter box.
Yes. You must 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 is fully connected and the 10 amp fuse is installed.
You must temporarily remove the rear threshold plate, privacy screen, storage covers, and floor covering. You also need to partially remove the rear interior trim panels on both the driver and passenger sides of the vehicle to access the taillight wiring harness. Set all items aside carefully to avoid damage.
Locate the taillight wiring harness that has a connection point on the rear of the taillight assembly. The manual notes that there are several similar connection points in the rear of the vehicle, so verify you are connecting to the correct harness before separating the connector. Ensure all connector surfaces are clean and free of dirt before connecting.
On the driver's side, attach each end of the T-Connectors containing the yellow and brown wires to the separated taillight connector. Ensure the connectors are fully inserted with locking tabs in place. Then route the T-Connector containing the green wire below the threshold cover to the passenger's side taillight housing and repeat the connection process using the T-Connector ends with the green wire.
Mount the black converter box on the driver's side of the vehicle in a flat, out-of-the-way location using the double-sided tape provided. The box should be positioned so it does not interfere with vehicle operation or interior access.
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 the vehicle floor, bed, or any exposed surfaces. The hole should be drilled at a suitable grounding point near the connector, such as the vehicle's frame or crossmember.
The drill bit size is 3/32".
Drill the 3/32" hole at 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 before drilling.
The T-Connector uses four wire colors: yellow (stop/turn light), brown (stop/turn light), green (tail light), and white (ground). The yellow and brown wires connect to the driver's side taillight harness, the green wire routes to the passenger's side taillight harness, and the white wire is grounded to the vehicle frame or crossmember.
Locate the red 12 ga. power wire from the T-Connector box on the driver's side. Attach the black 12 ga. wire provided to this red wire. Route the black wire either through a grommet and along the exterior frame, or follow existing wiring along the thresholds into the engine compartment up to the battery. Disconnect the vehicle's negative battery cable, 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 ga. wire using the yellow butt connector provided.
The fuse rating is 10 amps. The fuse is installed in the yellow fuse holder provided with the kit.
The power wire is 12 ga. (12 gauge). This includes both the red power wire from the T-Connector box and the black wire that connects to the vehicle battery.
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 up to the battery. Either way, avoid areas that may pinch or break the wire. If routing through a grommet and along the exterior, be careful to avoid hot pipes, heat shields, the fuel tank, or any other points that may pinch or break the wire.
The 4-flat connector is routed through the driver's side trim panel into the side storage compartment and stored there when not in use. When in use, pull the 4-flat through the door and close the door carefully to avoid pinching the harness in the door latch.
Do not exceed the lower of your towing manufacturer's rating or: maximum 1 stop/turn light per side at 2.1 amps each, or maximum tail lights at 4.2 amps total. Overloading the circuit can cause fires.
Wear safety glasses during installation. Before drilling, verify what is behind any surface to avoid damage to the vehicle or personal injury. Do not drill into the vehicle floor, bed, or exposed surfaces. When routing the power wire, avoid hot pipes, heat shields, and the fuel tank. Be careful not to pinch the harness in the door latch. Ensure all connections are complete and properly secured before testing. Do not exceed the circuit capacity to avoid fire risk.
After installation is complete, test and verify the installation with a test light or by connecting an actual trailer. All connections must be complete for the T-Connector to function properly. Ensure the 10 amp fuse is installed in the fuse holder and the vehicle's negative battery cable is reconnected.
After reinstalling the plastic trim panels, threshold, storage covers, floor covering, and other items removed during installation, verify that no wires have been pinched or cut. Ensure the 4-flat connector is properly routed through the driver's side trim panel into the storage compartment and that the door closes without pinching the harness.
The manual does not specify vehicle compatibility. Contact the manufacturer or retailer with your vehicle's make, model, and year to confirm fitment before purchasing.
Yes, disconnect the negative battery cable before connecting the power wire to the positive terminal. Reconnect only after the fuse holder is fully connected and the 10 amp fuse is installed.
The fuse rating is 10 amps, installed in the yellow fuse holder provided.
The manual states that all connections must be complete for the T-Connector to function properly. Verify: (1) the T-Connectors are fully inserted into the taillight harness with locking tabs in place, (2) the ground wire is securely attached to the vehicle frame or crossmember, (3) the power wire is properly connected to the vehicle's positive battery terminal through the fuse holder, (4) the 10 amp fuse is installed in the fuse holder, (5) the negative battery cable is reconnected, and (6) all connector surfaces are clean and free of dirt. Test with a test light or trailer to verify proper operation.
Jennifer
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
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