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Tekonsha
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2011 - 2020 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: | 118498 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.8 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 |
|---|---|---|
| 2011 - 2020 | Toyota Sienna | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
The 2011-2014 Toyota Sienna, 2015-2020 Toyota Sienna, 2018-2020 Toyota Sienna Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118498 (Part #TK118498) fits the following vehicles: 2011-2020 Toyota Sienna. Always verify your specific year, make, and model before ordering.
The 2011-2014 Toyota Sienna, 2015-2020 Toyota Sienna, 2018-2020 Toyota Sienna Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118498 (Part #TK118498) fits 2011-2020 Toyota Sienna models. The 2020 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the 2011-2014 Toyota Sienna, 2015-2020 Toyota Sienna, 2018-2020 Toyota Sienna Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118498 (Part #TK118498) is designed to fit the 2011-2020 Toyota Sienna.
The 2011-2014 Toyota Sienna, 2015-2020 Toyota Sienna, 2018-2020 Toyota Sienna Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118498 (Part #TK118498) Drilling is required for installation. Basic hand tools are typically all you need.
The T-Connector is a wiring interface that connects a trailer's electrical system to a Toyota Sienna's taillight wiring harness. It allows the vehicle's stop, turn, and tail light signals to be transmitted to a trailer. The system includes a black box converter unit, T-shaped connector ends with colour-coded wires (green, brown/red, and yellow), a fused power connection to the vehicle battery, and a 4-flat connector for the trailer harness.
Yes, the T-Connector is designed for the Toyota Sienna. The manual provides installation instructions specific to this vehicle model.
You will need: 10 mm socket and ratchet or 10 mm wrench; 12 mm socket and ratchet or 12 mm wrench; Phillips head screwdriver; test probe; drill with 3/32" drill bit; wire crimpers; wire cutters; and trim panel remover.
The T-Connector kit includes: the black box converter unit; T-shaped connector ends with colour-coded wires (green, brown/red, yellow); white ground wire with ring terminal; black 12 gauge power wire; yellow fuse holder with 10 amp fuse; yellow butt connectors; self-tapping screws for ground connection; double-sided tape for mounting the black box; cable ties; and a 4-flat connector for the trailer harness.
Yes. You must disconnect the vehicle's negative (-) battery cable before making any electrical connections. This is done in Step 9 before connecting the power wire to the battery. After all connections are complete, you reconnect the negative battery cable and install the 10 amp fuse.
Yes. You must open the rear tailgate and remove two bolts from each taillight assembly (driver's side first, then passenger's side) to access the taillight wiring harness connectors. The taillight housings are carefully pried rearward away from the vehicle. These assemblies are reinstalled at the end of the installation.
Yes. You must remove the jack storage compartment door on the passenger side and use a trim panel remover tool to carefully pull back the interior trim panels on both the driver's side and passenger's side. This provides access to route the T-Connector wires through the vehicle interior.
Yes, temporarily. The threshold plate must be removed by removing the cargo clips to allow access for routing the T-Connector wires. It is reinstalled after the wiring is routed.
The black box is mounted inside the rear quarter panel on the passenger side. The area must be cleaned with a 50/50 water/alcohol solution before mounting. The black box is secured using the double-sided tape provided in the kit.
Locate the vehicle's taillight wiring harness connectors on both the driver's and passenger's sides. The T-Connector has three ends with colour-coded wires: green and brown/red wires go to the passenger side, and the yellow wire goes to the driver's side. Insert each T-Connector end between the vehicle's wiring connectors and lock into place. Ensure all connector surfaces are clean and free of dirt before connecting.
The white ground wire has a ring terminal. You can either place the ring terminal under an existing screw attached to a clean metal surface, or drill a new 3/32" hole and use one of the self-tapping screws provided in the kit. Ensure the metal surface is clean before securing.
After disconnecting the negative battery cable, cut the wire from the yellow fuse holder 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 using the yellow butt connector provided. Route the black wire through a grommet along the exterior frame or along existing wiring through the thresholds into the engine compartment, avoiding areas that may pinch or break the wire. Connect the other end of the black 12 gauge wire to the red power wire on the T-Connector's black box using another yellow butt connector. Finally, reconnect the negative battery cable and install the 10 amp fuse into the fuse holder.
The T-Connector ends with green and brown/red wires are routed up through the opening on the passenger side, being careful to avoid areas that could damage the wiring. The T-Connector end with the yellow wire is routed to the driver's side behind the panels and along the threshold. The black power wire is routed either through a grommet along the exterior frame or along existing wiring through the thresholds into the engine compartment, avoiding areas that may pinch or break the wire.
Secure all loose wires with the cable ties provided in the kit. This prevents wires from being pinched or cut when reassembling trim panels and taillight assemblies.
Store the 4-flat connector in the jack storage compartment when not in use. When the trailer is in use, route the 4-flat harness through the rear tailgate/door seal.
Drilling may be required for the ground wire connection. You must drill a 3/32" hole if you choose not to place the ground wire's ring terminal under an existing screw on a clean metal surface. A drill with a 3/32" drill bit is listed in the required tools.
The T-Connector uses a 10 amp fuse. This fuse is installed in the yellow fuse holder that connects the vehicle's positive battery cable to the black 12 gauge power wire.
The power wire is 12 gauge (12 ga.). This black wire connects from the fuse holder to the red power wire on the T-Connector's black box.
The T-Connector has the following colour-coded wires: green wire (passenger side taillight connection), brown/red wire (passenger side taillight connection), yellow wire (driver's side taillight connection), white wire (ground), and red wire (power, located on the black box). The black 12 gauge power wire connects the fuse holder to the red power wire on the black box.
Do not exceed the lower of the towing manufacturer's rating or the following limits: maximum stop/turn light is 1 per side (2.1 amps); maximum tail lights are 5.6 amps. Overloading the circuit can cause fires. Consult the vehicle's owner's manual and instruction sheet for additional information.
Wear safety glasses and use all safety precautions during installation. Ensure all ground connections are secure when removing and reattaching the ground stud. Be careful not to break alignment tabs when removing taillight housings, and avoid pinching or cutting wires when routing them through the vehicle and reinstalling trim panels. All connections must be complete for the 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. All connections must be complete for the T-Connector to function properly before testing.
Yes, you must disconnect the vehicle's negative battery cable before making electrical connections.
The T-Connector uses a 10 amp fuse in the yellow fuse holder provided.
Maximum stop/turn light is 1 per side (2.1 amps); maximum tail lights are 5.6 amps. Do not exceed the lower of the towing manufacturer's rating or these limits.
Verify that all connections are complete. Check that: (1) the taillight harness connectors are properly locked into place on both driver's and passenger's sides; (2) the ground wire is securely attached to a clean metal surface; (3) the power wire is properly connected to the vehicle's positive battery cable through the fuse holder; (4) the 10 amp fuse is installed in the fuse holder; (5) the negative battery cable is reconnected. Test the installation with a test light or trailer. Reset the vehicle's electrical system by temporarily removing the key from the ignition for the initial test.
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