Our in-house experts typically reply within one business day.
Tekonsha
Verify Fitment
Select your vehicle to confirm this part fits.
2008 - 2014 Ford E-150 Econoline
Confirmed to Fit
2008 - 2014 Ford E-250 Econoline
Confirmed to Fit
2008 - 2014 Ford E-350 Econoline Super Duty
Confirmed to Fit
2007 - 2010 Ford Edge
Confirmed to Fit
2008 - 2012 Ford Escape
Confirmed to Fit
2007 - 2010 Lincoln MKX
Confirmed to Fit
2008 - 2011 Mazda Tribute
Confirmed to Fit
2005 - 2011 Mercury Mariner
Confirmed to Fit
Always the correct part
We know our products
Always the correct part
We know our products
Quality Products
Free Shipping!
Quality Products
Free Shipping!
On Sale Today
Original price was $117.50. Current price is $103.99.You save $13.51 (11%)
Free Shipping
Ships free on all orders
Authorized Dealer
Quick Ship
In stock and ready to ship — order now!
FREE ShippingFREE SHIPPING
Estimated delivery Mon, Aug 10 - Thu, Aug 13
Order before 2 PM EST Monday–Friday for same-day processing
Guaranteed safe & secure checkout
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: | 118551 |
| 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.
Experts available to answer your questions
Call 888-634-94941 Year
8 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2008 - 2014 | Ford E-150 Econoline | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2008 - 2014 | Ford E-250 Econoline | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2008 - 2014 | Ford E-350 Econoline Super Duty | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2007 - 2010 | Ford Edge | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2008 - 2012 | Ford Escape | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2007 - 2010 | Lincoln MKX | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2008 - 2011 | Mazda Tribute | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
| 2005 - 2011 | Mercury Mariner | Tow Harness T: Connector Assembly Drilling Required Install Time is 60 minutes |
The Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Circuit Protected ModuLite HD Module TK118551 (Part #TK118551) fits the following vehicles: 2008-2014 Ford E-150 Econoline; 2008-2014 Ford E-250 Econoline; 2008-2014 Ford E-350 Econoline Super Duty; 2007-2010 Ford Edge; 2008-2012 Ford Escape; 2007-2010 Lincoln MKX; 2008-2011 Mazda Tribute; 2005-2011 Mercury Mariner. Always verify your specific year, make, and model before ordering.
Yes, the Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Circuit Protected ModuLite HD Module TK118551 (Part #TK118551) is designed to fit the 2008-2014 Ford E-150 Econoline.
The Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Circuit Protected ModuLite HD Module TK118551 (Part #TK118551) fits 2008-2014 Ford E-150 Econoline models. The 2014 model year is the last year covered by this part number. For newer models, check for an updated version.
The Tekonsha T-One T-Connector Harness, 4-Way Flat, w/Circuit Protected ModuLite HD Module TK118551 (Part #TK118551) Drilling is required for installation. Basic hand tools are typically all you need.
Yes. The T-Connector is designed for Ford Edge and Lincoln MKX. Installation procedures for these models differ from other supported vehicles and require removal of bolts holding the taillights, access to the rear cargo area, and routing of wiring through the side trim panels.
Yes. The T-Connector fits these vehicles. Installation for these models differs from Ford Edge/Lincoln MKX and uses screws (not bolts) to remove taillights. The wiring is routed through the opening between the bumper and body rather than through side trim panels.
For Ford Edge and Lincoln MKX: Trim Panel Remover, 10mm Socket & Ratchet or 10mm Wrench, 20mm Socket & Ratchet or 20mm Wrench, Drill with 3/32" Drill Bit, 1/4" socket, Wire Crimpers, Wire Cutters, Philips Head Screwdriver, and Test-probe.
For these vehicles: Drill with 3/32" Drill Bit, 1/4" socket, Wire Crimpers, Wire Cutters, Philips Head Screwdriver, and Test-probe. These vehicles require fewer tools than Ford Edge/Lincoln MKX because trim panel removal and socket wrenches are not needed.
Yes. The vehicle's Negative (-) battery cable must be disconnected before connecting the fuse holder to the Positive (+) battery cable. The battery is disconnected in step 11 (Ford Edge/Lincoln MKX) or step 5 (other vehicles) and reconnected after the fuse holder is installed.
Yes. For Ford Edge and Lincoln MKX, remove two bolts and carefully pry the taillight housings rearward. For Mercury Mariner, Ford Escape, Mazda Tribute, and Ford Econoline, remove the screws holding the taillights and carefully pry the housings rearward. Be careful not to break the alignment tabs.
Yes. A 3/32" hole must be drilled to secure the white ground wire using the supplied eyelet and screw. The manual cautions to verify what is behind any surface before drilling to avoid damage to the vehicle or personal injury, and prohibits drilling into the vehicle floor, bed, or any exposed surfaces.
Yes, for Ford Edge and Lincoln MKX only. In step 14, slit the grommet on both the driver's and passenger's side to allow the T-Connector's wiring to pass through, then reseat the grommet. This step is not required for other supported vehicles.
The T-Connector uses a 15 amp fuse. The fuse is installed into the yellow fuse holder after the battery is reconnected.
The T-Connector uses yellow/brown wires, green wire, black wire, and white wire. The yellow/brown wires connect to the driver's side taillight, the green wire connects to the passenger's side taillight, the black wire connects to the battery positive terminal via a fuse holder, and the white wire is grounded.
The black wire is 12 gauge (12 ga.). This wire connects from the fuse holder to the T-Connector's black box and carries power from the vehicle's battery.
The T-Connector includes yellow butt connectors (used to connect the black wires and to connect the fuse holder to the black 12 ga. wire), a yellow fuse holder with a ring terminal, an eyelet and screw for grounding the white wire, cable ties for securing the harness, double-sided tape for mounting the black box, and a 4-Flat connector. The manual notes to store the 4-Flat connector in the rear cargo area when not in use.
Separate the vehicle's taillight wiring connectors carefully without breaking the locking tabs. Verify that the mating surfaces match and are clean and free of dirt. Plug the T-Connector harness between the vehicle's mating connectors, ensuring the connectors are fully inserted with locking tabs in place. This is done separately for the driver's side (yellow/brown wires) and passenger's side (green wire).
For Ford Edge/Lincoln MKX: Route the black wire from the T-Connector's black box through the opening in the taillight pocket, down behind the bumper, along the exterior frame or existing wiring along the thresholds, into the engine compartment, and up to the battery. For other vehicles: Route the black 12 ga. wire from the front of the vehicle rearward along the frame rail, then to the rear driver's side, up through the opening between the bumper and body, and connect to the T-Connector's black box. Avoid hot pipes, heat shields, fuel tank, and pinch points.
For Ford Edge/Lincoln MKX: Mount the black box in the driver's side storage area using the supplied double-sided tape. First, clean a flat area using a mixture of rubbing alcohol and water. For other vehicles: Mount the black box using the supplied double-sided tape. The manual warns that the module must be mounted with the epoxy side pointing toward the ground to prevent water buildup.
Use the supplied cable ties to secure the remainder of the T-Connector harness. Be careful to avoid areas that would cut or pinch the wire. For Ford Edge/Lincoln MKX, secure the harness in the driver's side storage area. For other vehicles, secure the harness under the bumper.
After reconnecting the battery and installing the 15 amp fuse, reset the vehicle's electrical system by temporarily removing the key from the ignition. Then test and verify the installation with a test light or trailer. All connections must be complete for the T-Connector to function properly.
Overloading circuits can cause fires. Do not exceed the stated product ratings or the towing manufacturer rating listed in your vehicle's owner's manual. Always wear safety glasses and use all safety precautions during installation. Read and follow all warnings and instructions printed on the tow vehicle's battery.
Route wires carefully to avoid hot pipes, heat shields, the fuel tank, and any other points that may pinch or break the wire. Do not route wires through areas where they could be cut or damaged. Secure wires with the supplied cable ties. Verify what is behind any surface before drilling.
The T-Connector is a trailer wiring harness that allows you to connect a trailer to your vehicle. It intercepts the vehicle's taillight wiring and provides a connection point for a trailer's lighting system via a 4-Flat connector.
Yes, the T-Connector (118551-037) is designed for Ford Edge and Lincoln MKX vehicles. Installation requires taillight removal, trim panel access, and battery disconnection.
Yes. The T-Connector fits these vehicles with a different installation procedure than Ford Edge/Lincoln MKX. Taillights are removed via screws, and wiring is routed through the bumper opening.
For Ford Edge/Lincoln MKX: Trim Panel Remover, 10mm and 20mm sockets/wrenches, 3/32" drill bit, 1/4" socket, wire crimpers, wire cutters, Philips screwdriver, and test-probe. For other vehicles: 3/32" drill bit, 1/4" socket, wire crimpers, wire cutters, Philips screwdriver, and test-probe.
Yes. Disconnect the vehicle's Negative (-) battery cable before connecting the fuse holder to the Positive (+) battery cable. Reconnect after the fuse holder is installed.
The T-Connector uses a 15 amp fuse installed in the supplied yellow fuse holder.
Yellow/brown wires (driver's side taillight), green wire (passenger's side taillight), black wire (12 ga., battery positive via fuse), and white wire (ground).
Verify that all connections are complete. Ensure the 15 amp fuse is installed in the yellow fuse holder. Reset the vehicle's electrical system by temporarily removing the key from the ignition. Check that all T-Connector harness connections to the taillight wiring are fully inserted with locking tabs in place. Test the installation with a test light or trailer. If the issue persists, verify that the mating surfaces of all connectors are clean and free of dirt.
The T-Connector black box must be mounted with the epoxy side pointing toward the ground to prevent water buildup. If water is accumulating, remount the module in the correct orientation using the supplied double-sided tape.
Total for 4 items:
$179.94$193.45
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
