
Ask a Question About This Product
Our in-house experts typically reply within one business day.
Our in-house experts typically reply within one business day.
Tekonsha
Free Shipping
Ships free on all orders
Verify Fitment
Select your vehicle to confirm this part fits.
2009 - 2014 Ford E-150 Econoline
Confirmed to Fit
2009 - 2014 Ford E-250 Econoline
Confirmed to Fit
2009 - 2014 Ford E-350 Econoline Super Duty
Confirmed to Fit
2009 - 2011 Ford E-450 Econoline Super Duty
Confirmed to Fit
2013 - 2014 Ford Expedition
Confirmed to Fit
2008 - 2016 Ford F-250 Super Duty
Confirmed to Fit
2008 - 2016 Ford F-350 Super Duty
Confirmed to Fit
2008 - 2016 Ford F-450 Super Duty
Confirmed to Fit
2008 - 2016 Ford F-550 Super Duty
Confirmed to Fit
2013 - 2014 Lincoln Navigator
Confirmed to Fit







Always the correct part
We know our products
Quality Products
Free Shipping!


Always the correct part
We know our products
Quality Products
Free Shipping!
FREE ShippingFREE SHIPPING
Estimated delivery Sat, Aug 29 - Tue, Sep 1
Order before 2 PM EST Monday–Friday for same-day processing
Guaranteed safe & secure checkout
Tekonsha trailer brake controller harnesses exist to make connecting your brake controller to your vehicle as easy as possible. These custom two-plug units are specifically designed to be used with any Tekonsha brake controller. The Plug & Play feature on the Tekonsha wiring harnesses makes them easy to install. Simply plug one end of the harness into the back of your desired Tekonsha brake controller and the other end into the port in your vehicle. No cutting, splicing, or taping required.
Each wiring harness is made up of four copper wires wrapped with a braided nylon thread to insulate the wires and protect them against nicks, punctures, and elevated temperatures. The four-pin Plug & Play connectors on each end of the harness are uniquely designed, with one end to fit each vehicle based on make and model year specifications, while the other end plugs easily into any Tekonsha brake controller.
Tekonsha trailer brake controller harnesses are custom designed, giving you plenty of wire to reach between where it is connected to the vehicle and where it connects to the brake controller without stretching or straining the wires. And because Tekonsha is the leader in wiring and electrical, you can relax knowing your connections will be safe and secure, so you can hit the road with confidence! With Tekonsha, Lifes a Journey. Stop Often.
| BRAND: | TEKONSHA |
| PART NUMBER: | 303400 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 0.25 LBS |
| WIRE COLORS: | BLACK, RED, BLUE WHITE |
| CONNECTOR GENDER: | FEMALE |
| CONNECTOR SHAPE: | SQUARE |
| CONNECTOR QUANTITY: | 2 |
| TERMINAL QUANTITY: | 4 |
| TERMINAL TYPE: | BLADE |

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
The Tekonsha Trailer Brake Controller Custom Harness, Vehicle & Brake Control Ends 303400 (Part #TK303400) fits 2009-2014 Ford E-150 Econoline models. The 2016 model year is the last year covered by this part number. For newer models, check for an updated version.
The Tekonsha Trailer Brake Controller Custom Harness, Vehicle & Brake Control Ends 303400 (Part #TK303400) fits the following vehicles: 2009-2014 Ford E-150 Econoline; 2009-2014 Ford E-250 Econoline; 2009-2014 Ford E-350 Econoline Super Duty; 2009-2011 Ford E-450 Econoline Super Duty; 2013-2014 Ford Expedition; 2008-2016 Ford F-250 Super Duty; 2008-2016 Ford F-350 Super Duty; 2008-2016 Ford F-450 Super Duty; 2008-2016 Ford F-550 Super Duty; 2013-2014 Lincoln Navigator. Always verify your specific year, make, and model before ordering.
Yes, the Tekonsha Trailer Brake Controller Custom Harness, Vehicle & Brake Control Ends 303400 (Part #TK303400) is designed to fit the 2009-2014 Ford E-150 Econoline.
The Tekonsha Trailer Brake Controller Custom Harness, Vehicle & Brake Control Ends 303400 (Part #TK303400) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The 22290-037 is a wiring adapter that connects an electric trailer brake controller to your vehicle's electrical system. It interfaces between the vehicle's brake system and the brake controller unit, allowing you to control trailer brakes from your vehicle. The adapter contains male terminals and connects via grey housings to either the factory brake controller (if equipped) or the vehicle's electrical system.
Yes. On vehicles equipped with a factory brake controller, the adapter connects to the large grey housing on the back of the brake controller unit. You will need to locate this housing and plug in the mating grey housing from the brake control adapter. Note that disconnecting the factory brake control will display a fault code on your vehicle's message center display.
Yes. On vehicles without a factory brake controller, the adapter connects to a grey housing located on the back of the trim panel directly to the left of the center dash access panel on the passenger side.
Yes. Vehicles not equipped with an OEM trailer tow package may require fuses and relays to complete the output and battery feed circuits. These are sold separately. Consult your vehicle's owner's manual for the specific locations where these components should be installed.
You will need a trim panel puller to remove the center dash access panel on the passenger side. A flashlight is also recommended to help locate the routing path for the adapter to exit the bottom of the dash.
Make sure the vehicle is off with the keys removed from the ignition. Wear safety glasses and use all safety precautions during installation. Read and follow all vehicle warnings and installation instructions before beginning.
Locate the access panel in the center of the dash on the passenger side. Using a trim panel puller, locate the notch in the panel and carefully pry it out and away from the dash, being careful not to damage the trim or panel. Unplug the housings attaching the panel, being careful not to damage the locking tabs, and set the panel aside.
Carefully pull the grey housing towards the access panel and plug in the mating grey housing from the brake control adapter. The specific housing location depends on your vehicle: on vehicles with a factory brake controller, it is on the back of the controller unit; on vehicles without one, it is on the back of the trim panel directly left of the access panel.
Locate a routing path for the adapter to exit the bottom of the dash. Use a flashlight to shine light up through the bottom of the dash to locate a hole to exit the dash. This will help you determine the best path for running the adapter wiring.
Complete the installation per the electric brake control manufacturer's instructions and mount the unit as directed. Perform test procedures as instructed by the brake controller manufacturer. After the brake controller is installed, plug in all connectors that were not used back into the original housings and snap the access panel back into place.
Do not exceed the lower of your towing manufacturer's rating or: maximum 3 axles with 6 brakes (18 amps). Overloading the circuit can cause fires. Consult your vehicle's owner's manual and the brake controller instruction sheet for additional information.
Yes. When disconnecting the factory installed brake control, you will get a fault code displayed on the message center of the dash. This is normal and expected during the installation process.
Yes, the adapter works on both. On vehicles with a factory brake controller, it connects to the grey housing on the back of the controller. On vehicles without one, it connects to a grey housing on the trim panel left of the dash access panel.
You need a trim panel puller to remove the dash access panel and a flashlight to locate the routing path for the adapter. A trim panel puller is essential; the flashlight is recommended.
Yes, vehicles without an OEM trailer tow package may require fuses and relays (sold separately) to complete the output and battery feed circuits. Check your vehicle's owner's manual for locations.
Maximum 3 axles with 6 brakes (18 amps). Do not exceed the lower of your towing manufacturer's rating or this limit, as overloading can cause fires.
Turn off the vehicle and remove the keys from the ignition. Wear safety glasses and follow all vehicle warnings and installation instructions.
10 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2009 - 2014 | Ford E-150 Econoline | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 20 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2009 - 2014 | Ford E-250 Econoline | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 20 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2009 - 2014 | Ford E-350 Econoline Super Duty | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 20 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2009 - 2011 | Ford E-450 Econoline Super Duty | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 20 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2013 - 2014 | Ford Expedition | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 20 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2008 - 2016 | Ford F-250 Super Duty | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 20 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2008 - 2016 | Ford F-350 Super Duty | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 20 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2008 - 2016 | Ford F-450 Super Duty | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 20 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
| 2008 - 2016 | Ford F-550 Super Duty | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 20 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf Cab & Chassis Only |
| 2013 - 2014 | Lincoln Navigator | Trailer Brake Control Harness Uses all existing holes. No Drilling required Install Time is 20 minutes Custom 2: plug harness designed to plug directly into your vehicle and brake control Comes in attractive packaging for retail shelf |
No reviews have been added for this product.