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Tekonsha
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2010 - 2021 Lexus RX350
Confirmed to Fit
2018 - 2021 Lexus RX350L
Confirmed to Fit
2010 - 2021 Lexus RX450h
Confirmed to Fit
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Tekonsha Tow Harnesses are the replacement for your factory electrical connector to the back of your vehicle. These harnesses are used to link the wiring from your vehicle to the trailer when towing. Tekonsha Tow Harnesses 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 Replacement Tow Harnesses. Hit the road with the peace of mind only Tekonsha can provide. Life's a Journey. Stop Often.
| BRAND: | TEKONSHA |
| PART NUMBER: | 118255 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 0.95 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: | 18 AWG, .85 AVSS |
| 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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3 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2010 - 2021 | Lexus RX350 | Tow Harness Wiring Package Uses all existing holes. No Drilling required Install Time is 20 minutes With Factory Tow Prep Package |
| 2018 - 2021 | Lexus RX350L | Tow Harness Wiring Package Uses all existing holes. No Drilling required Install Time is 20 minutes With Factory Tow Prep Package |
| 2010 - 2021 | Lexus RX450h | Tow Harness Wiring Package Uses all existing holes. No Drilling required Install Time is 20 minutes |
Yes, the 2010-2021 Lexus RX350, 2018-2021 Lexus RX350L, 2010-2021 Lexus RX450h Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118255 (Part #TK118255) is designed to fit the 2010-2021 Lexus RX350.
The 2010-2021 Lexus RX350, 2018-2021 Lexus RX350L, 2010-2021 Lexus RX450h Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118255 (Part #TK118255) fits the following vehicles: 2010-2021 Lexus RX350; 2018-2021 Lexus RX350L; 2010-2021 Lexus RX450h. Always verify your specific year, make, and model before ordering.
The 2010-2021 Lexus RX350, 2018-2021 Lexus RX350L, 2010-2021 Lexus RX450h Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118255 (Part #TK118255) fits 2010-2021 Lexus RX350 models. The 2021 model year is the last year covered by this part number. For newer models, check for an updated version.
The 2010-2021 Lexus RX350, 2018-2021 Lexus RX350L, 2010-2021 Lexus RX450h Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118255 (Part #TK118255) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
Yes, the T-Connector 118255-037 is designed for the Lexus RX 350. Your vehicle must have a factory tow harness connector behind the bumper and a 10-pin connector behind the rear interior trim panel on the passenger side for this T-Connector to be compatible.
Yes, the T-Connector 118255-037 is designed for the Lexus RX 450h. Your vehicle must have a factory tow harness connector behind the bumper and a 10-pin connector behind the rear interior trim panel on the passenger side for this T-Connector to be compatible.
A test-probe is the only tool listed as required for installation. You will also need basic tools to remove and reinstall trim panels and fasteners, though specific types are not detailed in the manual.
On the passenger side of the vehicle, you must temporarily remove: the rear threshold plate, floor covers, storage tray, and partially remove the rear interior trim panel. Set aside all removed items carefully to avoid damage. The 10-pin connector is located behind this rear interior trim panel.
The vehicle's 10-pin connector is located behind the rear interior trim panel on the passenger side of the vehicle. You will need to partially remove this trim panel to access it.
The vehicle's factory tow harness connector is located behind the bumper. This connector will mate to the end of the tow plug.
Insert the 10-pin tow plug adapter into the vehicle's 10-pin connector and lock it into place. Be careful not to damage the locking tabs and ensure that the connector is fully inserted with the locking tabs in place.
First, remove the factory tow harness protective cap and check that the mating surface is clean and free of dirt; clean if necessary. Then insert the tow plug into the connector. Be careful not to damage the locking tabs and ensure that the connector is fully inserted with the locking tabs in place.
Secure all loose wires and mount the Trailer Tow Harness in an accessible location using a bracket or electrical box (not included). When reinstalling trim panels and other components, be careful not to pinch or cut the wires.
The maximum stop/turn light/backup amperage is 1 per side (2.1 amps total per side). Do not exceed this rating or the lower of your towing manufacturer's rating, as overloading the circuit can cause fires.
The maximum tail light amperage is 5.6 amps. Do not exceed this rating or the lower of your towing manufacturer's rating, as overloading the circuit can cause fires.
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-Connector to function properly.
Wear safety glasses and use all safety precautions during installation. Be careful not to damage the locking tabs on connectors when inserting them. Do not pinch or cut wires when reinstalling trim panels and other components. Avoid overloading the circuit, as this can cause fires.
The T-Connector 118255-037 fits the Lexus RX 350 and Lexus RX 450h.
A test-probe is required to test the installation.
Yes. On the passenger side, you must temporarily remove the rear threshold plate, floor covers, storage tray, and partially remove the rear interior trim panel to access the 10-pin connector.
Maximum stop/turn light/backup: 1 per side (2.1 amps). Maximum tail lights: 5.6 amps. Do not exceed these ratings or your towing manufacturer's lower rating.
Total for 3 items:
$75.95
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
