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Tekonsha
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2020 - 2025 Jeep Gladiator
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2018 - 2025 Jeep Wrangler
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: | 118786 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 1.8 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: | 2-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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2 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2020 - 2025 | Jeep Gladiator | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2018 - 2025 | Jeep Wrangler | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
The 2020-2024 Jeep Gladiator, 2018-2024 Jeep Wrangler Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118786 (Part #TK118786) fits 2020-2025 Jeep Gladiator models. The 2025 model year is the last year covered by this part number. For newer models, check for an updated version.
The 2020-2024 Jeep Gladiator, 2018-2024 Jeep Wrangler Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118786 (Part #TK118786) fits the following vehicles: 2020-2025 Jeep Gladiator; 2018-2025 Jeep Wrangler. Always verify your specific year, make, and model before ordering.
Yes, the 2020-2024 Jeep Gladiator, 2018-2024 Jeep Wrangler Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118786 (Part #TK118786) is designed to fit the 2020-2025 Jeep Gladiator.
The 2020-2024 Jeep Gladiator, 2018-2024 Jeep Wrangler Tekonsha Plug & Play T-Connector Adapter Trailer Wiring 118786 (Part #TK118786) Drilling is required for installation. Basic hand tools are typically all you need.
Yes, the T-One® Connector is designed for both Jeep Wrangler and Jeep Gladiator. However, the taillight removal procedure differs between the two models. On Wrangler, you access the taillight bolt through a small square access cover on the trim panel below the side windows. On Gladiator, you open the rear tailgate to access the bolts holding the taillights in place.
The kit includes the T-Connector harness with yellow and green wire ends, a black 12 gauge power wire, a white ground wire with eyelet and screw, a yellow fuse holder with 15 amp fuse, a yellow butt connector, cable ties, and the black box module. The 4-Flat connector harness is also included but requires a separate bracket or electrical box (not included) for mounting.
Required tools are: 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, test probe, and 8 mm socket and ratchet or 8 mm wrench.
Yes. You must disconnect the vehicle's negative (−) battery cable before connecting the black 12 gauge power wire to the positive (+) battery terminal. After the fuse holder is attached to the positive battery cable and the black wire is connected to the fuse holder, you reconnect the negative battery cable and install the 15 amp fuse.
Open the rear door to access the rear bolt holding the taillight. On each side, locate the small square access cover on the trim panel just below the side windows. Using a trim panel remover, remove the access cover to expose the white bolt. Using a 10 mm socket, remove the white bolt and carefully pull the taillight away from the vehicle to expose the taillight wiring harness. Repeat for the passenger side.
Open the rear tailgate to access the bolts holding the taillights in place. Remove two bolts and carefully pry the taillight housings rearward away from the vehicle, being careful not to break the alignment tabs.
On the driver's side, insert the T-One® Connector end with the yellow wire between the vehicle wiring connectors and lock into place. Be careful not to damage the locking tabs and ensure connectors are fully inserted with locking tabs in place. On the passenger's side, plug the T-Connector end with the green wire between the mating plugs on the passenger's side taillight socket and vehicle wiring harness, again ensuring full insertion and locking tabs are secure.
Route the harness containing the green wire and the 4-Flat connector down the opening behind the taillight on the driver's side. Route the 4-Flat harness to the center of the vehicle underneath. Route the harness containing the green wire underneath the vehicle and up through the opening behind the passenger's side taillight. Route all wiring carefully to avoid hot pipes, heat shields, the fuel tank, or any other points that may pinch or break the wire.
Yes. On the driver's side, you must drill a 3/32" hole to secure the white ground wire. Before drilling, verify what is behind the surface to avoid damage to the vehicle and personal injury. Do not drill into any exposed surfaces. Clean dirt and rustproofing from the area first, then secure the white wire using the eyelet and screw provided.
Drill a 3/32" hole on the driver's side near the connector to secure the white ground wire. Before drilling, verify what is behind the surface to avoid damage to the vehicle and personal injury, and do not drill into exposed surfaces.
The T-One® Connector uses a 15 amp fuse. The fuse is installed in the yellow fuse holder provided with the kit after the black 12 gauge power wire is connected to the positive battery terminal.
Locate the black 12 gauge power wire from the T-Connector box on the driver's side. Attach the black 12 gauge wire provided. Route the black wire along the exterior frame or follow existing wiring along the thresholds into the engine compartment up to the battery, avoiding areas that may pinch or break the wire. After disconnecting the negative battery cable, remove the fuse from the yellow fuse holder, 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 provided. Reconnect the negative battery cable and install the 15 amp fuse.
The T-One® Connector uses yellow wire (driver's side connector), green wire (passenger's side connector), black 12 gauge wire (power from battery), and white wire (ground). The yellow fuse holder and yellow butt connector are also part of the electrical assembly.
Mount the black box module on a flat surface in an out-of-the-way place to prevent damage or rattling. The location should be accessible but protected from impact.
Secure the remainder of the T-One® 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.
Route the 4-Flat harness underneath and to the center of the vehicle. Mount the 4-Flat end in an accessible location with a bracket or electrical box (not included). This connector is not supplied with a mounting bracket, so you must provide your own.
All connections must be complete for the T-One® 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.
Do not exceed the lower of the towing manufacturer rating (including in your vehicle owner's manual) or the specific amperage ratings stated on the product. Overloading circuits can cause fires. The kit includes a 15 amp fuse, which is the circuit protection rating.
Always wear safety glasses and use all safety precautions during installation. Read and follow all warnings and instructions included with the product before beginning installation. Read and follow all warnings and cautions printed on the tow vehicle's battery. Verify what is behind any surface prior to drilling to avoid damage to the vehicle and personal injury. Route wiring carefully to avoid hot pipes, heat shields, the fuel tank, or any other points that may pinch or break the wire.
Yes. Before separating and connecting the vehicle's taillight wiring connectors, ensure all connector surfaces are clean and free of dirt. This ensures proper electrical contact.
On the driver's side, locate a suitable grounding point near the connector. Clean dirt and rustproofing from the area before drilling the 3/32" hole. Secure the white wire using the eyelet and screw provided.
Yes, it fits both models. Wrangler and Gladiator have different taillight removal procedures, but the connector works on both.
Trim panel remover, 10 mm and 8 mm sockets/wrenches, drill with 3/32" bit, 1/4" socket, wire crimpers, wire cutters, Phillips screwdriver, and test probe.
Yes, you must drill a 3/32" hole on the driver's side for the ground wire. Verify what is behind the surface before drilling.
Yes, disconnect the negative battery cable before connecting the power wire to the positive terminal. Reconnect it after the fuse holder is installed.
15 amp fuse. It is installed in the yellow fuse holder provided after the power wire is connected to the positive battery terminal.
Do not exceed the lower of the towing manufacturer rating or the specific amperage ratings on the product. The 15 amp fuse provides circuit protection.
Yes, you must provide a bracket or electrical box (not included) to mount the 4-Flat connector in an accessible location.
Verify that all connections are complete and fully seated. Check that the yellow connector on the driver's side and green connector on the passenger's side are both fully inserted with locking tabs in place. Ensure the black power wire is properly connected to the positive battery terminal through the fuse holder, and the white ground wire is securely fastened. Test with a test light or trailer. Reset the vehicle electrical system by temporarily removing the ignition key. If the issue persists, verify that the 15 amp fuse is installed in the fuse holder.
Matt
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
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