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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: | 118599 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.65 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.
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3 compatible vehicles
| Year | Make & Model | Style | Notes |
|---|---|---|---|
| 2020 - 2024 | Ford Explorer | — | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2010 - 2019 | Ford Taurus | Sedan · 4-Door | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2013 - 2016 | Lincoln MKS | — | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
The 2020-2023 Ford Explorer, 2013-2016 Lincoln MKS, 2010-2019 Ford Taurus Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118599 (Part #TK118599) fits the following vehicles: 2020-2024 Ford Explorer; 2010-2019 Ford Taurus; 2013-2016 Lincoln MKS. Always verify your specific year, make, and model before ordering.
The 2020-2023 Ford Explorer, 2013-2016 Lincoln MKS, 2010-2019 Ford Taurus Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118599 (Part #TK118599) fits 2020-2024 Ford Explorer models. The 2024 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the 2020-2023 Ford Explorer, 2013-2016 Lincoln MKS, 2010-2019 Ford Taurus Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118599 (Part #TK118599) is designed to fit the 2020-2024 Ford Explorer.
The 2020-2023 Ford Explorer, 2013-2016 Lincoln MKS, 2010-2019 Ford Taurus Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118599 (Part #TK118599) Drilling is required for installation. Basic hand tools are typically all you need.
Yes, the T-Connector is designed for Ford Taurus, Lincoln MKS, and Ford Explorer. Installation location varies by vehicle: on Taurus and MKS, the T-Connector attaches to the driver's side taillight wiring harness; on Explorer, it attaches to both driver and passenger side harnesses.
The T-Connector is a trailer wiring interface that taps into the vehicle's taillight wiring harness to provide trailer lighting connections. It includes a converter box that connects to the vehicle's battery via a fused power wire, allowing the vehicle's lighting system to control trailer lights.
Required tools: trim panel remover, 10 mm socket and ratchet (or 10 mm wrench), 7 mm socket and ratchet (or 7 mm wrench), Torx 25 driver, drill with 3/32" bit, 1/4" socket, wire crimpers, wire cutters, Phillips head screwdriver, and test probe.
The T-Connector includes: T-Connector harness with yellow, brown, green, and red wires; black converter box; white ground wire with eyelet; black 12 gauge power wire; yellow fuse holder with 10 amp fuse; yellow butt connector; cable ties; and double-sided tape for mounting the converter box.
Yes. Step 5 requires you to disconnect the vehicle's negative (-) battery cable before making any electrical connections. The battery is reconnected in Step 6 after the fuse holder is installed.
For Ford Taurus and Lincoln MKS: open the trunk, remove the threshold panel, and partially remove the corner felt trunk liner on both sides to expose the taillight wiring harness. For Ford Explorer: open the rear hatch, temporarily remove the rear threshold plate, privacy screen, storage covers, and floor covering; open the rear door, fold the rear seat forward, and partially remove the rear interior trim panels on both driver and passenger sides.
1. Locate the taillight wiring harness on the driver's side and separate the connectors carefully without breaking the locking tabs. 2. Ensure the mating surfaces are clean and free of dirt. 3. Attach the T-Connector end containing yellow and brown wires to the driver's side. 4. Route the T-Connector containing the green wire below the threshold cover to the passenger's side and attach the end with green and red wires. Ensure all connectors are fully inserted with locking tabs in place.
1. Locate the taillight wiring harness on both driver and passenger sides and separate the connectors carefully without breaking the locking tabs. Ensure surfaces are clean. 2. On the driver's side, insert the T-Connector end with the yellow wire between the vehicle wiring connectors and lock into place. 3. Route the connector with the green wire down the threshold to the passenger side. 4. On the passenger's side, insert the T-Connector end with the green wire between the vehicle wiring connectors and lock into place. Ensure all connectors are fully inserted with locking tabs in place.
Mount the black converter box on a flat surface on the driver's side in an out-of-the-way location using the double-sided tape provided. The location should not interfere with vehicle operation or access.
Yes. You must drill a 3/32" hole on the driver's side near the connectors to secure the white ground wire with the eyelet and screw provided. Before drilling, verify what is behind the surface to avoid damage to the vehicle or personal injury. Do not drill into any exposed surfaces.
1. Locate the red 12 gauge power wire from the T-Connector box on the driver's side. 2. Attach the black 12 gauge wire provided to it. 3. Route the black wire either through a grommet and 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. 4. Disconnect the vehicle's negative battery cable. 5. Remove the fuse from the yellow fuse holder if not already removed. Cut the fuse holder wire, attach the ring terminal to the vehicle's positive battery cable, and connect the other end of the fuse holder to the black 12 gauge wire using the yellow butt connector. 6. Reconnect the negative battery cable and install the 10 amp fuse into the fuse holder.
The T-Connector uses a 10 amp fuse. This fuse is installed in the yellow fuse holder that connects the black 12 gauge power wire to the vehicle's positive battery cable.
The T-Connector harness includes: yellow wire (driver's side taillight connection on Taurus/MKS, or driver's side on Explorer), brown wire (driver's side on Taurus/MKS), green wire (passenger's side connection), red wire (passenger's side on Taurus/MKS), white wire (ground connection), and black wire (power connection to battery positive).
Always wear safety glasses during installation. Read and follow all warnings on the vehicle battery. Do not exceed the product's amperage rating or the towing manufacturer's rating stated in the vehicle owner's manual. Do not route wires through hot pipes, heat shields, fuel tank, or areas that may pinch or break the wire. Do not drill into exposed surfaces. Do not pinch the harness in the trunk latch. Secure all wires with cable ties to prevent damage or rattling.
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. All connections must be complete for the T-Connector to function properly before testing.
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 pinch, cut, or melt the wire. When reinstalling plastic trim panels, threshold, storage covers, and floor covering, be careful not to pinch or cut the wires. On Taurus and MKS, route the 4-flat connector through the driver's side trim panel into the side storage compartment and store it there when not in use.
Before connecting, ensure that the mating surfaces of the vehicle harness connectors match the T-Connector ends. All connector surfaces should be clean and free of dirt. Separate the vehicle's taillight connectors carefully without breaking the locking tabs.
Locate a suitable grounding point on the driver's side near the connectors. Drill a 3/32" hole at this location and secure the white wire with the eyelet using the screw provided. Do not drill into any exposed surfaces. Verify what is behind the surface before drilling to avoid damage to the vehicle.
Yes, the T-Connector (118599-037) is designed for Ford Taurus, Lincoln MKS, and Ford Explorer. Installation location varies: driver's side for Taurus/MKS, both sides for Explorer.
You need: trim panel remover, 10 mm and 7 mm sockets/wrenches, Torx 25 driver, 3/32" drill bit, 1/4" socket, wire crimpers, wire cutters, Phillips screwdriver, and test probe.
Yes, disconnect the vehicle's negative battery cable before making electrical connections. Reconnect it after the fuse holder is installed.
The T-Connector uses a 10 amp fuse installed in the yellow fuse holder provided.
Do not exceed the product's amperage rating or the towing manufacturer's rating in your vehicle owner's manual. Overloading circuits can cause fires. Wear safety glasses during installation.
Verify that all connections are complete. The manual states: 'All connections must be complete for the T-Connector to function properly.' Check that: (1) both T-Connector ends are fully inserted into the taillight harness connectors with locking tabs in place, (2) the white ground wire is securely fastened with the eyelet and screw, (3) the black power wire is properly connected to the red power wire from the converter box, (4) the ring terminal is securely attached to the vehicle's positive battery cable, (5) the yellow butt connector properly joins the fuse holder to the black 12 gauge wire, and (6) the 10 amp fuse is installed in the fuse holder. Reset the vehicle electrical system by temporarily removing the ignition key.
George
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 4 items:
$150.45$157.20
