Our in-house experts typically reply within one business day.
Tekonsha
On Sale Today
Original price was $112.50. Current price is $99.57.Verify Fitment
Select your vehicle to confirm this part fits.
2019 - 2025 Toyota RAV4
Confirmed to Fit
Always the correct part
We know our products
Quality Products
Free Shipping!
Always the correct part
We know our products
Quality Products
Free Shipping!
You save $12.93 (11%)
Free Shipping
Ships free on all orders
Authorized Dealer
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: | 118801 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.35 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.
Experts available to answer your questions
Call 888-634-94941 Year
The 2019-2023 Toyota RAV4 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118801 (Part #TK118801) fits 2019-2025 Toyota RAV4 models. The 2025 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the 2019-2023 Toyota RAV4 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118801 (Part #TK118801) is designed to fit the 2019-2025 Toyota RAV4.
The 2019-2023 Toyota RAV4 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118801 (Part #TK118801) fits the following vehicles: 2019-2025 Toyota RAV4. Always verify your specific year, make, and model before ordering.
The 2019-2023 Toyota RAV4 Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118801 (Part #TK118801) Drilling is required for installation. Basic hand tools are typically all you need.
Yes, the T-One® T-Connector 118801-037 is designed for Toyota RAV4. The manual covers installation on this vehicle.
Trim panel remover, 10mm socket and ratchet or 10mm wrench, drill with 3/32" bit, 1/4" socket, wire crimpers, wire cutters, Phillips head screwdriver, and test probe.
Yes. You must disconnect the vehicle's negative (−) battery cable before connecting the power wire to the positive battery terminal. Reconnect it after the fuse holder is installed.
Yes. You must drill a 3/32" hole to secure the white ground wire using the eyelet and screw provided. The hole must be drilled into a suitable grounding point such as the vehicle's frame or crossmember, not into the floor or bed.
Install a 15 amp fuse into the yellow fuse holder provided with the T-Connector.
Test and verify installation with a test light or trailer once installed. For the initial test, reset the vehicle electrical system by temporarily removing the key from the ignition. All connections must be complete for the T-One® T-Connector to function properly.
The T-One® T-Connector is a trailer wiring interface that connects to your Toyota RAV4's taillight wiring harness. It provides a connection point for trailer lighting by tapping into the vehicle's existing brake, turn signal, and ground circuits. The connector includes a black box module that houses the electrical components and a 4-flat connector for the trailer.
The manual specifies the T-One® T-Connector 118801-037 is for Toyota RAV4. The manual does not indicate compatibility with other vehicle models or specific RAV4 model years. Consult the manufacturer or fitment database to confirm compatibility with your specific RAV4 year and trim level.
You must temporarily remove the rear threshold plate, privacy screen, storage covers, and floor covering. Open the rear door and fold the rear seat forward. Partially remove the rear interior trim panels on both the driver and passenger sides. Set aside all items carefully to avoid damage.
All connector surfaces must be clean and free of dirt to ensure proper electrical contact and function. Dirt can prevent the connectors from seating fully and cause electrical problems.
On the driver's side, insert the T-Connector end with the yellow wire between the vehicle's taillight wiring connectors and lock into place. Ensure connectors are fully inserted with locking tabs in place. Route the connector with the green wire down the threshold to the passenger side, then insert it between the passenger-side taillight connectors and lock into place. Be careful not to damage the locking tabs.
The white ground wire must be secured to 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, drill a 3/32" hole, and secure the white wire using the eyelet and screw provided.
On the driver's side, locate the black 12 ga. power wire from the T-Connector box. Route the black wire along the exterior frame or follow 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, avoid hot pipes, heat shields, the fuel tank, or any other points that may pinch or break the wire.
The yellow fuse holder protects the power circuit. It is connected between the black 12 ga. power wire and the vehicle's positive battery terminal. A 15 amp fuse is installed in the fuse holder to protect the circuit from overcurrent.
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 ga. wire using the yellow butt connector provided. Reconnect the negative battery cable and install the 15 amp fuse into the fuse holder.
Mount the black box module on a flat surface in an out-of-the-way location to prevent damage or rattling. The manual does not specify a particular mounting location, only that it should be secure and not interfere with vehicle operation.
Secure the remainder of the 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. Do not pinch the harness in the door latch.
Store the 4-flat connector in the rear cargo area when not in use. When in use, pull the 4-flat connector through the door and close the door. Be careful not to pinch the harness in the door latch.
Replace both access panels, spare tire cover, cargo floor hatch, and cargo nets that were removed during installation.
Do 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. The manual specifies a 15 amp fuse, which limits the circuit capacity. Consult your vehicle's owner's manual and the product documentation for the specific towing rating.
Always wear safety glasses and use all safety precautions during installation. Before drilling, verify what is behind any surface to avoid damage to the vehicle and personal injury. Do not drill into any exposed surfaces. Verify all connections are complete before testing. Read and follow all warnings and instructions included with the product and printed on the vehicle's battery.
Drill a 3/32" hole for the ground wire. The hole must be drilled into a suitable grounding point such as the vehicle's frame or crossmember, not into the floor or bed. Clean dirt and rustproofing from the area before drilling.
No. Do not drill into the vehicle floor or bed. Locate a suitable grounding point such as the vehicle's frame or crossmember instead. Before drilling any surface, verify what is behind it to avoid damage to the vehicle and personal injury.
The power wire is black 12 ga. (12 gauge). This wire connects from the T-Connector box to the vehicle's positive battery terminal through the yellow fuse holder.
The T-Connector uses three wire colors: yellow wire (driver-side taillight connector), green wire (passenger-side taillight connector), white wire (ground connection), and black wire (power connection to battery). The yellow and green wires tap into the vehicle's existing taillight circuits on each side.
Test and verify installation with a test light or trailer once installed. For the initial test, reset the vehicle electrical system by temporarily removing the key from the ignition. All connections must be complete for the T-One® T-Connector to function properly. Use a test probe to check for proper voltage at the connector.
Overloading circuits can cause fires. Do not exceed the stated product ratings or the towing manufacturer rating in your vehicle owner's manual. The T-Connector uses a 15 amp fuse to protect the circuit. Always respect the lower of the towing manufacturer rating or the specific amperage ratings stated on the product.
Verify that all connections are complete. Check that the T-Connector ends are fully inserted into the taillight connectors with locking tabs in place on both driver and passenger sides. Ensure the ground wire is properly secured to the frame or crossmember. Verify the 15 amp fuse is installed in the yellow fuse holder and that the fuse holder is connected to both the black power wire and the vehicle's positive battery terminal. Reset the vehicle electrical system by temporarily removing the key from the ignition. Test with a test light or trailer to verify proper function.
Ensure all connector surfaces are clean and free of dirt before insertion. Separate the vehicle's taillight connector carefully without breaking the locking tabs. Insert the T-Connector end fully between the vehicle wiring connectors until you hear or feel it lock into place. Verify the locking tabs are engaged on both the T-Connector and vehicle connector. If the connector still will not lock, inspect for damage to the locking tabs or connector housing.
A blown fuse indicates an overcurrent condition in the circuit. This may be caused by a short circuit, improper connection, or exceeding the product's amperage rating. Verify all connections are secure and properly made. Check that the ring terminal is securely attached to the positive battery terminal and that the yellow butt connector is properly crimped to both the fuse holder wire and the black 12 ga. power wire. Ensure you are not exceeding the towing manufacturer rating or the product's amperage rating. If the fuse continues to blow, there may be a short circuit in the wiring or connectors.
1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2019 - 2025 | Toyota RAV4 | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
Quick Ship
In stock and ready to ship — order now!
FREE ShippingFREE SHIPPING
Estimated delivery Sun, Sep 6 - Wed, Sep 9
Order before 2 PM EST Monday–Friday for same-day processing
Guaranteed safe & secure checkout
Total for 4 items:
$175.52$188.45
Sam
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
