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Tekonsha
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Authorized Dealer2004 - 2010 Toyota Sienna
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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: | 118304 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.05 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: | NO |
| 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 |
|---|---|---|
| 2004 - 2010 | Toyota Sienna | Tow Harness T: Connector Assembly Drilling Required Install Time is 20 minutes |
The 2004-2010 Toyota Sienna Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118304 (Part #TK118304) fits the following vehicles: 2004-2010 Toyota Sienna. Always verify your specific year, make, and model before ordering.
Yes, the 2004-2010 Toyota Sienna Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118304 (Part #TK118304) is designed to fit the 2004-2010 Toyota Sienna.
The 2004-2010 Toyota Sienna Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118304 (Part #TK118304) fits 2004-2010 Toyota Sienna models. The 2010 model year is the last year covered by this part number. For newer models, check for an updated version.
The 2004-2010 Toyota Sienna Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118304 (Part #TK118304) Drilling is required for installation. Basic hand tools are typically all you need.
The T-Connector is a trailer wiring adapter for Toyota Sienna vehicles. It allows you to connect a trailer's electrical harness to your vehicle's existing taillight wiring. The T-Connector intercepts the vehicle's taillight signals (stop, turn, and tail lights) and routes them to a 4-flat connector for trailer use. The black converter box houses the electrical conversion circuitry and must be mounted on the passenger side of the vehicle.
Yes, the T-Connector (part 18304-037) is designed for Toyota Sienna vehicles. The installation instructions are specific to the Sienna's taillight assembly location, rear threshold design, and jack storage compartment configuration.
You will need: a 10mm socket and ratchet or 10mm wrench, a drill with a 3/32" drill bit, and a test-probe (test light). These tools are required to remove the taillight bolts, remove the threshold bolts, drill the ground wire hole, and verify the installation.
The T-Connector includes: a screw or cable tie for mounting the black converter box, cable ties for securing loose wires, an eyelet and screw for securing the white ground wire, and a 4-flat connector for storage in the rear cargo area when not in use.
The manual does not specify whether battery disconnection is required. Contact the manufacturer or consult your vehicle's owner's manual for guidance on electrical work safety procedures.
You must remove: both rear taillight housings (by removing two bolts per housing), the rear threshold (by removing three cargo bolts), and carefully pull back the driver's side trim panel. On the passenger side, open the jack storage compartment to access the taillight assembly openings. Vehicle options vary; if equipped with a rear speaker cover, remove it carefully as screws or clips may come loose during panel removal.
The T-Connector uses two separate harnesses with different colored wires. First, route the harness with the green wire from inside the vehicle through the taillight opening on the passenger side. Disconnect the vehicle's taillight connector (being careful not to damage the locking tabs) and plug the T-Connector's green-wire harness between the separated halves. Repeat this process with the yellow-wire harness, routing it across the vehicle under the threshold cover. Both connections must be complete for the T-Connector to function properly.
Yes, drilling is required. You must drill a single 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. Choose a suitable grounding point near the connector, such as the vehicle's frame or cross member. Clean dirt and rustproofing from the area before drilling.
Locate a suitable grounding point near the connector, such as the vehicle's frame or cross member. Do not drill into the vehicle floor, bed, or any exposed surfaces. Clean dirt and rustproofing from the area before drilling the 3/32" hole. Secure the white ground wire using the eyelet and screw provided.
The drill bit size is 3/32". This hole is used to secure the white ground wire using the eyelet and screw provided with the T-Connector.
Do not exceed the lower of your towing manufacturer's rating or these limits: maximum 2.1 amps per stop/turn light (maximum 1 per side), and maximum 4.2 amps for tail lights. Overloading the circuit can cause fires. Consult your vehicle's owner's manual and the T-Connector instruction sheet for additional information.
The T-Connector uses three colored wires: green wire (first harness to connect), yellow wire (second harness to connect), and white wire (ground connection). The green and yellow wires carry the taillight signals from the vehicle to the trailer connector. The white wire must be grounded to the vehicle's frame or cross member using the provided eyelet and screw.
Route the green-wire harness from inside the vehicle through the taillight opening on the passenger side. Route the yellow-wire harness across the vehicle under the threshold cover (removed in step 2), then out through the taillight opening on the passenger side. Tuck the yellow wire under the threshold panel and secure it. Secure all loose wires with the cable ties provided.
Mount the black converter box on the passenger side of the vehicle in an out-of-the-way location. Use the screw or cable tie provided to secure it. Secure all loose wires with cable ties to prevent them from interfering with vehicle operation.
Wear safety glasses during installation. Before drilling, verify what is behind any surface to avoid damage to the vehicle and personal injury. Do not drill into the vehicle floor, bed, or exposed surfaces. Be careful not to damage the locking tabs when disconnecting the vehicle's taillight connectors. All connections must be complete for the T-Connector to function properly. After installation, test and verify the installation with a test light or trailer before towing.
After installation is complete, test and verify the installation with a test-probe (test light) or by connecting a trailer and checking that all lights function correctly. All connections must be complete for the T-Connector to function properly. This verification ensures that the stop, turn, and tail light signals are correctly routed to the trailer connector.
The 4-flat connector is used to connect your trailer's electrical harness to the T-Connector when towing. When not towing, store the 4-flat connector in the rear cargo area of your vehicle.
Connect the green-wire harness first (steps 5-6), then connect the yellow-wire harness second (step 7). Both harnesses must be fully connected for the T-Connector to function properly. The green wire is routed from the passenger side, and the yellow wire is routed across the vehicle under the threshold cover before exiting through the taillight opening.
Carefully pull back the driver's side trim panel, being careful not to break any clips or tabs. If the vehicle is equipped with a rear speaker cover, pull the panel back carefully as screws or clips holding the cover may come off during panel removal.
When disconnecting the vehicle's wiring harness connector from the taillight assembly, be careful not to damage the locking tabs. These tabs keep the connector secure, and damaging them could prevent proper reconnection.
The T-Connector is designed for Toyota Sienna vehicles only.
Remove both rear taillight housings, the rear threshold, and pull back the driver's side trim panel. Open the passenger side jack storage compartment to access the taillight assembly openings.
The green and yellow wires carry taillight signals from the vehicle to the trailer. The white wire is the ground connection and must be secured to the vehicle's frame or cross member.
Total for 4 items:
$141.26$144.70
George
The staff was able to quickly assist me with locating the correct product I needed. Shipping was really fast. Item arrived in 2 days. Will be using TowUniverse again!!
May 22, 2023
