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Tekonsha
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Original price was $81.25. Current price is $74.50.Verify Fitment
Select your vehicle to confirm this part fits.
2008, 2010 - 2012 Toyota Hilux
Confirmed to Fit
1993 - 1998 Toyota T100
Confirmed to Fit
2005 - 2015 Toyota Tacoma
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: | 118496 |
| 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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3 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2008, 2010 - 2012 | Toyota Hilux | Tow Harness T: Connector Assembly Uses all existing holes. No Drilling required Install Time is 10 minutes |
| 1993 - 1998 | Toyota T100 | Tow Harness T: Connector Assembly Uses all existing holes. No Drilling required Install Time is 10 minutes |
| 2005 - 2015 | Toyota Tacoma | Tow Harness T: Connector Assembly Uses all existing holes. No Drilling required Install Time is 10 minutes |
The Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Converter TK118496 (Part #TK118496) fits Toyota Hilux models. The 2015 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Converter TK118496 (Part #TK118496) is designed to fit the Toyota Hilux.
The Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Converter TK118496 (Part #TK118496) fits the following vehicles: Toyota Hilux; 1993-1998 Toyota T100; 2005-2015 Toyota Tacoma. Always verify your specific year, make, and model before ordering.
The Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Converter TK118496 (Part #TK118496) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The T-Connector is a trailer wiring adapter that allows you to connect a trailer to your Toyota Tacoma or Toyota T100 by tapping into the vehicle's existing taillight wiring. It provides connections for trailer stop, turn, and tail lights through a 4-flat connector that routes to the center of the vehicle for trailer hookup.
Yes, the T-Connector is designed for Toyota Tacoma. The installation process for Tacoma includes removing the taillights, connecting the T-Connector ends to the vehicle's taillight wiring harness, grounding to the driver's side taillight pocket ground stud, and routing the 4-flat connector underneath the bumper to the center of the vehicle.
Yes, the T-Connector is designed for Toyota T100. The installation process for T100 differs from Tacoma: the taillight wiring harness is located near the rear of the frame with connection points on both sides, grounding requires drilling a 3/32" hole into the vehicle frame or cross member, and the white wire is secured using an eyelet and screw rather than a nut on a ground stud.
You need a 10mm Socket & Ratchet or a 10mm Wrench. For Toyota T100 installations, you will also need a drill to create a 3/32" hole for the ground wire.
The T-Connector includes: a nut for securing the ring terminal to the ground stud (Tacoma only), an eyelet and screw for grounding (T100 only), and cable ties for securing the harness and black box to the vehicle.
The manual does not specify whether the battery must be disconnected. Consult your vehicle's owner's manual or contact the manufacturer for guidance on safe electrical work procedures.
No. For Toyota Tacoma, step 1 requires you to open the tailgate and remove the vehicle's taillights by carefully prying the housings away from the vehicle. The T-Connector ends must be plugged into the wiring connections attached to each taillight housing.
No. For Toyota T100, the taillight wiring harness is located near the rear of the frame with connection points on both sides. You do not need to remove the taillights; you access the wiring harness directly at the frame.
1. Remove the taillights and locate the vehicle's wiring harness. 2. Separate the connections and clean the surfaces. 3. Plug the T-Connector end with yellow wire into the driver's side wiring connections. 4. Route the T-Connector end with green wire and 4-flat connector through the hole between the bumper and body, then underneath the bumper. Route the green wire end to the passenger's side and repeat steps 2–3. 5. Secure the ring terminal to the ground stud in the driver's side taillight pocket using the nut provided. 6. Route the 4-flat to the center of the vehicle and secure the black box and harness with cable ties. 7. Reinstall the taillights.
1. Locate the taillight wiring harness near the rear of the frame. 2. Separate the connections and clean the surfaces. 3. Plug the T-Connector end with yellow wire into the driver's side wiring connections. 4. Repeat steps 2–3 for the passenger's side using the T-Connector end with green wire. 5. Locate a suitable grounding point near the adapter (vehicle frame or cross member), drill a 3/32" hole, and secure the white wire using the eyelet and screw provided. 6. Route the 4-flat to the center of the vehicle and secure the black box and harness with cable ties.
Separate the vehicle's existing wiring connections carefully without breaking the locking tabs. Clean all surfaces of dirt. Beginning on the driver's side, plug the T-Connector end with the yellow wire between the wiring connections, ensuring the T-Connector is fully inserted with locking tabs in place. Repeat this process on the passenger's side using the T-Connector end with the green wire.
Route the 4-flat connector through the hole between the vehicle bumper and body, then underneath the bumper. From the driver's side, route the T-Connector end with green wire to the passenger's side and up through the opening. Route the 4-flat to the center of the vehicle for trailer connection. Be careful to avoid any areas that would cut or pinch the wire.
No. Toyota Tacoma installation does not require drilling. The T-Connector connects to existing taillight wiring and grounds to an existing ground stud in the driver's side taillight pocket.
Yes. Toyota T100 installation requires drilling a 3/32" hole into the vehicle frame or cross member to secure the white ground wire using the eyelet and screw provided. Do not drill into the vehicle floor or bed. Before drilling, verify what is behind the surface to avoid damage to the vehicle or personal injury. Do not drill into any exposed surfaces.
Drill a 3/32" hole into the vehicle frame or cross member. Do not drill into the vehicle floor or bed. Before drilling, verify what is behind the surface to avoid damage to the vehicle or personal injury.
The T-Connector has three colour-coded ends: yellow wire (driver's side connection), green wire (passenger's side connection), and white wire (ground connection). The yellow and green wires connect to the vehicle's taillight wiring harness on their respective sides. The white wire is grounded to the vehicle frame or ground stud.
Locate the ground stud in the driver's side taillight pocket. Secure the T-Connector's ring terminal (white wire) to this stud using the nut provided.
Locate a suitable grounding point near the adapter, such as the vehicle frame or cross member. 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.
The 4-flat connector is the trailer connection point that routes to the center of the vehicle. It connects the vehicle's taillight signals to the trailer. The connector is secured to the vehicle with cable ties and positioned at the center for easy trailer hookup.
The maximum stop/turn light rating is 1 per side at 2.1 amps. Do not exceed this limit or the lower of your towing manufacturer's rating, whichever is lower. Overloading the circuit can cause fires.
The maximum tail light rating is 7.5 amps. Do not exceed this limit or the lower of your towing manufacturer's rating, whichever is lower. Overloading the circuit can cause fires.
Secure the 4-flat connector and the remainder of the T-Connector harness with the cable ties provided. Route the harness carefully to avoid any areas that would cut or pinch the wire. This prevents damage, rattling, and potential electrical failure.
All connections must be complete for the T-Connector to function properly. Test and verify the installation with a test light or by connecting an actual trailer once installed. This ensures all wiring is correctly connected and functioning before towing.
After installation, verify that the taillights have been reinstalled correctly, all T-Connector connections are fully inserted with locking tabs in place, the black box and harness are secured with cable ties, and the 4-flat connector is routed to the center of the vehicle. Test the installation with a test light or trailer to confirm all lights function correctly.
Yes, the T-Connector is designed for both Toyota Tacoma and Toyota T100. Installation procedures differ between the two models, particularly for grounding and taillight access.
Drilling is not required for Tacoma. For T100, you must drill a 3/32" hole into the vehicle frame or cross member for the ground wire. Do not drill into the vehicle floor or bed.
Maximum stop/turn light: 1 per side (2.1 amps). Maximum tail light: 7.5 amps. Do not exceed these limits or your towing manufacturer's rating, whichever is lower. Overloading can cause fires.
Test the installation with a test light or by connecting a trailer once installed. All connections must be complete for proper function. Verify that all lights operate correctly before towing.
Yes, for Tacoma only. For T100, the wiring harness is accessed at the frame without removing taillights.
First, verify that all connections are complete. The manual states that all connections must be complete for the T-Connector to function properly. Check that the T-Connector ends are fully inserted into the wiring connections with locking tabs in place on both the driver's and passenger's sides. Verify that the ground connection is secure (nut on Tacoma ground stud, or eyelet and screw on T100 frame). Test the installation with a test light or trailer to confirm all lights function correctly.
Check the following: (1) Verify all T-Connector connections are fully inserted with locking tabs in place on both sides. (2) Ensure the wiring connection surfaces were cleaned of dirt before installation. (3) Confirm the ground connection is secure—for Tacoma, the ring terminal must be tightened to the ground stud; for T100, the eyelet and screw must be secure. (4) Verify the trailer's light amperage does not exceed the T-Connector limits: 2.1 amps per stop/turn light or 7.5 amps for tail lights. (5) Test with a test light to confirm the 4-flat connector is receiving power.
Jennifer
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May 22, 2023