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2004 - 2015 Toyota Prius
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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: | 118505 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.16 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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1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2004 - 2015 | Toyota Prius | Tow Harness T: Connector Assembly Drilling Required Install Time is 25 minutes |
The 2012-2015 Toyota Prius, 2004-2015 Toyota Prius Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118505 (Part #TK118505) fits the following vehicles: 2004-2015 Toyota Prius. Always verify your specific year, make, and model before ordering.
The 2012-2015 Toyota Prius, 2004-2015 Toyota Prius Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118505 (Part #TK118505) fits 2004-2015 Toyota Prius models. The 2015 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the 2012-2015 Toyota Prius, 2004-2015 Toyota Prius Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118505 (Part #TK118505) is designed to fit the 2004-2015 Toyota Prius.
The 2012-2015 Toyota Prius, 2004-2015 Toyota Prius Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118505 (Part #TK118505) Drilling is required for installation. Basic hand tools are typically all you need.
The T-Connector is a wiring harness that integrates with your Toyota Prius's taillight wiring to provide a connection point for trailer lighting. It includes a black box module, color-coded wires (green, yellow, and white), a fuse holder with a 10 amp fuse, double-sided tape, cable ties, and grounding hardware (eyelet and screw). The connector allows you to safely control trailer lights through your vehicle's existing electrical system.
Yes, the T-Connector is designed for the Toyota Prius. The manual does not specify model years or trim levels, so contact the manufacturer or your installer to confirm compatibility with your specific Prius generation and year.
No. The T-Connector is designed for use only with 12V battery systems. Do not attempt to use it with any other voltage system.
You will need: trim panel remover, 10 mm socket and ratchet or 10 mm wrench, drill with 3/32" drill bit, 1/4" socket, wire crimpers, wire cutters, Phillips head screwdriver, and a test probe. Safety glasses are also required.
The T-Connector includes: a black box module, color-coded wires (green, yellow, white), a fuse holder with a 10 amp fuse, double-sided tape for mounting the black box, cable ties for securing the harness, an eyelet and screw for grounding the white wire, and a 4-flat connector for storage in the spare tire compartment when not in use.
Yes. You must disconnect and isolate the vehicle's negative (−) battery terminal before beginning installation. The battery is located inside the cargo area on the passenger side, underneath the floor covering in the rear corner. After connecting the fuse holder to the positive terminal, you will reconnect the negative battery cable and install the 10 amp fuse. See your vehicle's owner's manual for any special battery reconnection instructions.
The 12-volt battery is located inside the cargo area on the passenger side, underneath the floor covering in the rear corner.
Open the trunk/hatch and locate the vehicle wiring inside the rear cargo area by partially removing the plastic threshold cover, side access panels, carpet panels, and cargo trays. On both the driver and passenger sides, you will find the taillight wiring harness with connection points that match the ends of the T-Connector.
1. Locate the taillight wiring harness on both driver and passenger sides. 2. Separate the connector carefully without breaking the locking tabs. Ensure all connector surfaces are clean and free of dirt. 3. On the passenger side, insert the T-Connector end with the green wire between the vehicle wiring connectors and lock into place. 4. Route the T-Connector end with the yellow wire to the driver's side behind the panels and along the threshold. 5. Repeat for the T-Connector end with the yellow wire on the driver's side.
On the passenger side, locate a suitable grounding point near the connector. You have two options: Option 1: Clean dirt and rustproofing from the area, drill a 3/32" hole, and secure the white wire using the eyelet and screw provided. Do not drill into the vehicle floor, bed, or any exposed surfaces. Option 2: Locate an existing ground stud, loosen the bolt, place the screw eyelet on the stud, and re-tighten the bolt. Before drilling, verify what is behind any surface to avoid damage to the vehicle and personal injury.
1. Attach the fuse holder (with fuse removed) to the positive (+) terminal of the battery. 2. Reconnect the vehicle's negative (−) battery cable. 3. Install the 10 amp fuse into the fuse holder. See your vehicle's owner's manual for any special battery reconnection instructions.
On the passenger side, mount the T-Connector black box using the double-sided tape provided. Secure the remainder of the T-Connector harness with the cable ties provided to prevent damage or rattling. Be careful to avoid any areas that would cut or pinch the wire.
Store the 4-flat connector in the spare tire compartment when not in use.
Drilling may be required depending on your grounding option. If you choose Option 1 for the white ground wire, you must drill a 3/32" hole to secure the eyelet and screw. If you choose Option 2 and use an existing ground stud, no drilling is required. Before drilling, verify what is behind any surface to avoid damage to the vehicle and personal injury. Do not drill into the vehicle floor, bed, or any exposed surfaces.
Drill a 3/32" hole for the white ground wire eyelet. Before drilling, verify what is behind the surface to avoid damage to the vehicle and personal injury. Do not drill into the vehicle floor, bed, or any exposed surfaces.
The T-Connector uses a 10 amp fuse. This fuse protects the circuit and must be installed in the fuse holder that connects to the vehicle's positive battery terminal.
Do not exceed the lower of your vehicle manufacturer's rating or: maximum stop/turn light: 1 per side (2.1 amps); maximum tail lights: 5.6 amps. Overloading the circuit can cause fires. Read your vehicle's owner's manual and instruction sheet for additional information.
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 the vehicle floor, bed, or any exposed surfaces. Read and follow all warnings and cautions printed on the tow vehicle's battery. Ensure all connector surfaces are clean and free of dirt before connecting. Be careful not to pinch or cut wires when reinstalling trim panels and floor coverings.
All connections must be complete for the T-Connector to function properly. 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.
After installation, verify that: all connections are complete and secure; the T-Connector black box is mounted securely with double-sided tape on the passenger side; all wires are secured with cable ties and routed to avoid pinching or cutting; all trim panels, threshold, storage covers, and floor covering are reinstalled without pinching or cutting wires; and the 4-flat connector is stored in the spare tire compartment when not in use. Test the installation with a test light or trailer and reset the vehicle electrical system by temporarily removing the ignition key.
Yes. Disconnect and isolate the negative battery terminal before installation. The battery is in the cargo area on the passenger side under the floor covering. Reconnect it after attaching the fuse holder to the positive terminal.
The T-Connector uses a 10 amp fuse, which must be installed in the fuse holder connected to the vehicle's positive battery terminal.
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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
