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Tekonsha
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Original price was $152.50. Current price is $128.84.2023 - 2025 Lexus RX350
Confirmed to Fit
2023 - 2025 Lexus RX500h
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: | 118884 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.5 LBS |
| UNIVERSAL OR SPECIFIC FIT: | SPECIFIC |
| CIRCUIT PROTECTED: | YES |
| HARNESS TYPE: | MALE FEMALE |
| TERMINAL QUANTITY: | 4 |
| WIRE COLORS: | BROWN, GREEN, WHITE, YELLOW |
| WIRE QUANTITY: | 4 |
| WIRE GAUGE: | 18 AWG, .85 AVSS |
| 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 2023-2023 Lexus RX350, 2023-2023 Lexus RX500h Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118884 (Part #TK118884) fits the following vehicles: 2023-2025 Lexus RX350; 2023-2025 Lexus RX500h. Always verify your specific year, make, and model before ordering.
Yes, the 2023-2023 Lexus RX350, 2023-2023 Lexus RX500h Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118884 (Part #TK118884) is designed to fit the 2023-2025 Lexus RX350.
The 2023-2023 Lexus RX350, 2023-2023 Lexus RX500h Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118884 (Part #TK118884) fits 2023-2025 Lexus RX350 models. The 2025 model year is the last year covered by this part number. For newer models, check for an updated version.
The 2023-2023 Lexus RX350, 2023-2023 Lexus RX500h Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118884 (Part #TK118884) Drilling is required for installation. Basic hand tools are typically all you need.
Yes, the T-One® Connector (part 118884) is designed for Lexus RX350 and RX500 models. For the most current information regarding specific application years and trim levels, visit www.horizonglobal.com.
Required tools: safety glasses, Phillips screwdriver, wire stripper, wire crimper, 10 mm socket, ratchet, drill with 3/32" drill bit, heat gun, and test light. A trim panel tool is also helpful for removing interior panels.
Yes. You must locate the vehicle's battery, disconnect and isolate the negative battery cable before beginning installation. The negative cable is reconnected after the fuse holder and power wire connections are complete.
Yes. You must drill a 3/32" hole to secure the white ground wire using the eyelet and screw provided. Do not drill into the vehicle floor, bed, or any exposed surfaces. Always verify what is behind the surface before drilling to avoid damage to the vehicle or personal injury.
The product uses a 15-amp fuse installed in the fuse holder. The fuse is initially removed during installation (step 8) and reinstalled after the negative battery cable is reconnected (step 12).
The power wire is 12 gauge (12 ga.) black wire. It connects from the vehicle's positive battery terminal (via a ring terminal and fuse holder) to the black power wire on the T-One® Connector's black box using yellow heat shrinkable butt connectors.
After installation, test and verify the installation with a test light or trailer. For the initial test, reset the vehicle electrical system by temporarily removing the key from the ignition. Ensure all connections are complete and all removed interior panels are reinstalled without pinching or cutting wires.
The T-One® Connector (part 118884) is a trailer lighting module designed for Lexus RX350 and RX500 vehicles. It provides a 4-flat connector interface for trailer lighting by tapping into the vehicle's existing taillight wiring harness on both the driver and passenger sides. The module includes a black box that mounts inside the vehicle and connects to the vehicle's battery through a fused power circuit.
If your Lexus is equipped with the Start/Stop option, you must connect the module only to the main vehicle battery. Do not connect the module power wire to the support battery. Failure to connect to the main vehicle battery may result in damage to the module.
The hardware kit includes: Perma Seal butt connectors (yellow heat shrinkable), ring terminal, #8 screw, 15-amp fuse, double-sided tape, fuse holder, 3/32" drill bit, 10 mm socket, fish wire, and 6" wire ties. Two yellow heat shrinkable butt connectors are provided for the power wire connections.
On both the driver and passenger sides, you must remove the plastic threshold cover, cargo trays, and the side panel to expose the vehicle's taillight wiring harness. Use a trim panel tool, Phillips screwdriver, or 10 mm socket. Be careful not to break the mounting tabs. These panels are reinstalled after the T-One® Connector installation is complete.
Mount the black box on the driver's side using the double-sided tape provided. First, clean the flat mount surface area with a 50-50 mixture of rubbing alcohol and water to ensure proper adhesion. Choose a suitable mounting point near where the ground wire will be secured.
On the driver's side, locate the vehicle's taillight wiring harness connector and separate it carefully without breaking the locking tabs. Insert the T-One® Connector end containing the yellow wire between the vehicle and taillight connector. Repeat on the passenger's side with the green wire. Ensure all connector surfaces are clean and free of dirt before insertion.
Route the harness containing the green wire from the driver's side to the passenger side. Pass the wire across the threshold and behind the passenger's side felt panel to reach the taillight pocket. Ensure the wire is not pinched or damaged during routing.
Drill a 3/32" hole near the black box to secure the white ground wire. You can drill a new hole or use an existing ground stud if available. Do not drill into the vehicle floor or bed. Always verify what is behind the surface before drilling to avoid damage to the vehicle or personal injury. Clean dirt and rustproofing from the area before securing the white wire with the eyelet and screw provided.
After disconnecting the negative battery cable, cut the fuse holder wire and attach the ring terminal to the vehicle's positive (+) battery cable. Connect the other end of the fuse holder to the black 12 ga. wire using a yellow heat shrinkable butt connector. Route the black 12 ga. wire from the front of the vehicle rearward along the frame rail, avoiding hot pipes, heat shields, fuel tank, and other points that may pinch or break the wire. Connect the other end to the black power wire on the T-One® Connector's black box using another yellow heat shrinkable butt connector.
Use a heat gun to heat the yellow heat shrinkable butt connector. Start heating from the center of the splice connector and work outward to the edges on each end until the tubing shrinks and sealant flows. Allow the connector to cool completely before inspecting the splice to ensure a proper seal.
The T-One® Connector uses four main wires: yellow wire (driver's side taillight connection), green wire (passenger's side taillight connection), white wire (ground connection to vehicle chassis), and black wire (12 ga. power connection from vehicle battery). The 4-flat connector harness is routed through the driver's side panel and threshold into the storage compartment when not in use.
Always wear safety glasses during installation. Do not touch the negative battery terminal to the positive battery terminal, as serious injury and damage to the vehicle's electrical system can occur. Do not exceed the towing manufacturing rating stated in your vehicle owner's manual or the specific amperage ratings on the product. Verify what is behind any surface before drilling to avoid damage to the vehicle or personal injury. Do not drill into exposed surfaces. Avoid pinching or breaking wires during routing and reinstallation of panels.
After installation is complete, test and verify the installation with a test light or trailer. For the initial test, reset the vehicle electrical system by temporarily removing the key from the ignition. Ensure all connections are complete and properly seated. All connector surfaces should be clean and free of dirt, and all locking tabs should be fully engaged.
Clean the 4-flat connector after each use. Perform a pre-trip inspection of the 4-flat harness to ensure no damage to terminals and connection points for proper lighting connection and operation. Ensure the 4-flat harness does not get pinched in door latches, trailer connection points, or contact the road surface. Clean the connection and add dielectric grease (sold separately) to the terminal pins to maintain proper electrical contact.
Check that the T-One® Connector ends are fully inserted and locked in place. Remove the module's power fuse for 10 seconds and repeat the test. Also check chassis grounds and ensure ring terminals are in full contact with the vehicle chassis. If the issue persists, remove the module's power fuse.
Ensure the fuse is fully inserted into the fuse holder with no breaks. Verify the fuse holder is connected properly to the positive post of the battery. Remove the fuse for 10 seconds and repeat the test. Ensure the module is connected to B+ (positive battery). Using a tester or voltmeter, check for voltage on either side of the yellow butt connector near the module. If installation may have activated circuit protection, start the vehicle and turn all functions off (tail/headlights, brake, and turns), then remove the module power fuse for 10 seconds and repeat the test.
Possible causes and solutions: 1. T-One® Connector ends not fully inserted or locked - ensure they are fully inserted and locked in place, remove module power fuse for 10 seconds, and repeat test. 2. Poor chassis grounds - check chassis grounds and ensure ring terminals are in full contact with vehicle chassis, remove module power fuse. 3. Fuse issues - ensure fuse is fully inserted into fuse holder with no breaks, remove fuse for 10 seconds and repeat test. 4. Improper fuse holder connection - verify fuse holder is connected properly to positive battery post. 5. Module not connected to B+ - check voltage on either side of yellow butt connector near module using tester or voltmeter. 6. Circuit protection activated - start vehicle and turn all functions off (tail/headlights, brake, turns), remove module power fuse for 10 seconds and repeat test.
Check the following in order: 1. Fuse insertion - ensure the 15-amp fuse is fully inserted into the fuse holder with no breaks. 2. Fuse holder connection - verify the fuse holder is connected properly to the positive post of the battery. 3. Module power - remove fuse for 10 seconds and repeat test. 4. Module connection - ensure the module is connected to B+ (positive battery). 5. Voltage check - using a tester or voltmeter, check for voltage on either side of the yellow butt connector near the module. 6. Circuit protection - if installation may have activated circuit protection, start the vehicle and turn all functions off (tail/headlights, brake, and turns), then remove the module power fuse for 10 seconds and repeat the test.
2 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2023 - 2025 | Lexus RX350 | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2023 - 2025 | Lexus RX500h | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
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
Total for 3 items:
$75.95
