Tekonsha Tow Harness, 7 Way Complete Kit TK22125TekonshaOriginal price was $316.25. Current price is $243.88.Out of Stock
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2014 - 2018 Freightliner Sprinter 2500
Confirmed to Fit
2014 - 2018 Freightliner Sprinter 3500
Confirmed to Fit
2014 - 2018 Mercedes-Benz Sprinter 2500
Confirmed to Fit
2014 - 2018 Mercedes-Benz Sprinter 3500
Confirmed to Fit
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Tekonsha Tow Harnesses are the replacement for your factory electrical connector to the back of your vehicle. These harnesses are used to link the wiring from your vehicle to the trailer when towing. Tekonsha Tow Harnesses 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 Replacement Tow Harnesses. Hit the road with the peace of mind only Tekonsha can provide. Life's a Journey. Stop Often.
| BRAND: | TEKONSHA |
| PART NUMBER: | 22115 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 6.95 LBS |
| UNIVERSAL OR SPECIFIC FIT: | SPECIFIC |
| CIRCUIT PROTECTED: | NO |
| HARNESS TYPE: | MALE FEMALE |
| TERMINAL QUANTITY: | 7 |
| WIRE COLORS: | BROWN, GREEN, YELLOW, WHITE |
| WIRE QUANTITY: | 7 |
| WIRE GAUGE: | 18 AWG, .85 AVSS |
| POWER LEAD REQUIRED: | YES |
| ELECTRICAL SYSTEM TYPE: | MULTIPLEXED SYSTEM |
| HARDWARE INCLUDED: | YES |
| AMPERAGE: | 30 A |
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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4 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2014 - 2018 | Freightliner Sprinter 2500 | Tow Harness Wiring Package Drilling Required Install Time is 90 minutes |
| 2014 - 2018 | Freightliner Sprinter 3500 | Tow Harness Wiring Package Drilling Required Install Time is 90 minutes |
| 2014 - 2018 | Mercedes-Benz Sprinter 2500 | Tow Harness Wiring Package Drilling Required Install Time is 90 minutes |
| 2014 - 2018 | Mercedes-Benz Sprinter 3500 | Tow Harness Wiring Package Drilling Required Install Time is 90 minutes |
Yes, the Tekonsha Tow Harness, 7-Way Complete Kit TK22115 (Part #TK22115) is designed to fit the 2014-2018 Freightliner Sprinter 2500.
The Tekonsha Tow Harness, 7-Way Complete Kit TK22115 (Part #TK22115) fits 2014-2018 Freightliner Sprinter 2500 models. The 2018 model year is the last year covered by this part number. For newer models, check for an updated version.
The Tekonsha Tow Harness, 7-Way Complete Kit TK22115 (Part #TK22115) fits the following vehicles: 2014-2018 Freightliner Sprinter 2500; 2014-2018 Freightliner Sprinter 3500; 2014-2018 Mercedes-Benz Sprinter 2500; 2014-2018 Mercedes-Benz Sprinter 3500. Always verify your specific year, make, and model before ordering.
The Tekonsha Tow Harness, 7-Way Complete Kit TK22115 (Part #TK22115) Drilling is required for installation. Basic hand tools are typically all you need.
The 22115-037 is a 7-way tow harness kit designed to connect a towing vehicle to a trailer with electric brakes. It includes a body harness, brake control harness, 7-way connector, power modules, fuses, circuit breakers, wiring, and all necessary connectors and hardware. The kit requires a separate brake control unit (such as Tekonsha models 90195, 90885, or 90160) to function. Approximate installation time is 120 minutes.
Required tools include: 7-mm, 10-mm, and 15-mm sockets; ratchet; Torx T-25 and T-30 bits; trim panel puller; Phillips head #2 screwdriver; wire strippers and crimpers; wire cutters; 2-inch hole saw and drill; heat gun; and a tester or volt meter. You will also need metal primer paint to coat bare metal after drilling.
The kit includes: 24 cable ties (8.5 inch), 1 cable tie (14.5 inch), 1 wire tap, 1 fuse (25 AMP), 2 fuses (30 AMP), 4 ring terminals, 2 fuse holders, 4 yellow butt connectors, 2 blue butt connectors, 1 wire tap, 2 wire assemblies, 1 circuit breaker (25 AMP), 1 circuit breaker (30 AMP), 1 breaker boot, 1 grommet, 1 double-sided tape, 1 T-ONE connector, 1 7-way connector, 1 7-way socket, and 1 ModuLite power module.
Yes. You must disconnect and isolate the vehicle's negative battery terminal before beginning installation. The battery is accessed by removing the metal plate under the driver's side floor mats. Reconnect the negative battery cable only after all other installation steps are complete.
The manual does not state whether professional installation is required. However, it does recommend contacting a Tekonsha-approved installer for professional installation if you encounter difficulties. A list of approved installers is available at www.tekonsha.com by entering your zip code in the 'Where to buy' section.
Yes. You must drill a 2-inch hole at the bottom of the bumper on the driver's side using a 2-inch hole saw and drill. Be sure to avoid drilling through additional materials beyond the intended hole. After drilling, deburr the hole and coat the bare metal with primer paint.
You must remove: the foam corner piece behind the driver's headrest (partially), the interior trim piece behind the driver's side door, the driver's side bumper fascia and air baffle below it, the snap-in air vent covers on the left and right vertical columns inside the cargo area, and the trim piece along the driver's side ceiling to expose existing wires.
The 7-way connector uses the following wire colors: Black (ground), Red (left stop/brake), Brown (right stop/brake), White (ground), Yellow (backup), Green (tail lights), and Blue (trailer brakes). Each wire connects to specific vehicle lights or functions as detailed in the wiring diagram on page 1 of the manual.
The kit uses three fuses: one 25 AMP fuse for the Tow Harness Power Module, and two 30 AMP fuses—one for the 7-Way Harness Power and one for the Brake Control Power. The 25 AMP fuse is inserted into the Tow Harness Power Module fuse holder. The 30 AMP fuses are inserted into separate fuse holders for the 7-Way and Brake Control circuits. All fuses must be fully inserted with no breaks.
Route the brake control harness white wire to an existing vehicle chassis ground point and mount using the provided ring terminal. Route the black wire to the vehicle's positive post underneath the floor using a 30 AMP circuit breaker, butt connector, and wire assembly. Connect the blue wire (electric brake output) to the body harness blue wire using a butt connector. Connect the red wire to the 18-gauge red wire on the body harness using a blue butt connector. When towing trailers with 1-3 axles, use the included 20 AMP circuit breaker instead of the 30 AMP.
Route the body harness black wire to the vehicle's positive post underneath the floor using a 30 AMP fuse holder (7-Way), butt connector, and ring terminal. Route the 12-gauge red wire to the vehicle's positive post using a 25 AMP fuse holder (Tow Harness), butt connector, and ring terminal. Route the 18-gauge red wire to the brake control harness. All wires must be routed carefully to avoid hot pipes, heat shields, fuel tanks, or pinch points.
Locate the wires connected to the CHIMSL. Using a test light, determine the +12V wire by pressing the brake—the test light will illuminate when the brake is pressed. Using the provided wire tap, connect the 18-gauge red wire to the +12V CHIMSL wire. Using the provided blue butt connector, connect the other end to the 18-gauge red wire of the body harness.
Apply heat directly to the butt connectors using a heat gun or other heat source, working from the center out toward the edges, until the tubing recovers and the adhesive flows. Allow the connectors to cool completely before inspecting the splice and checking its integrity.
Do not exceed the following circuit loads: maximum 2 stop/turn/backup lights per side (4.2 amps total), maximum tail lights (7.5 amps), and maximum 7-way 12-volt positive (30 amps). Overloading the circuit can cause fires. Refer to your vehicle's owner's manual for additional information.
When using a volt meter or circuit tester, carefully probe one wire at a time. Do not probe across two wires or across the vehicle structure, as this can cause damage or incorrect readings.
When splicing, use wire splices that match the gauge of the wires being joined. The provided blue wire taps are designed for 16-18 gauge wire only and must not be used on wires of different gauges.
Test and verify the installation using a test light or by connecting an actual trailer once installed. Ensure all lights function correctly and that the 7-way connector is fully seated and locked. If any function does not work, refer to the troubleshooting guide.
Replace all coverings, grommets, and other components that were removed during installation. Some grommets may need to be altered to allow wires to pass through. Seal any altered grommets with silicone to prevent water intrusion.
Secure the harness with the cable ties provided (24 ties of 8.5 inches and 1 tie of 14.5 inches) to prevent damage or rattling. Be careful to avoid any areas that would pinch, cut, or melt the wire. Secure the brake harness connector near the desired brake control mounting location.
The manual does not list specific vehicle models or years. Contact Tekonsha at 800-632-3290 or www.tekonsha.com to confirm fitment before purchasing.
You must purchase a separate brake control unit (Tekonsha models 90195, 90885, or 90160 recommended). The kit includes all other connectors, fuses, and wiring. Metal primer paint is also needed to coat the drilled hole.
Yes. You must drill a 2-inch hole at the bottom of the driver's side bumper using a 2-inch hole saw. The hole must be deburred and the bare metal coated with primer.
The kit uses one 25 AMP fuse for the tow harness power module and two 30 AMP fuses for the 7-way and brake control circuits. When towing trailers with 1-3 axles, use the included 20 AMP circuit breaker for the brake control instead of the 30 AMP.
Do not exceed: 2 stop/turn/backup lights per side (4.2 amps), tail lights (7.5 amps), or 7-way 12V+ (30 amps). Overloading can cause fires.
Yes. Disconnect and isolate the vehicle's negative battery terminal before starting installation. Reconnect it only after all other steps are complete.
Test using a test light or by connecting an actual trailer. Verify all lights function and the 7-way connector is fully seated and locked. If functions fail, follow the troubleshooting guide.
First, ensure the T-ONE connector ends are fully inserted and locked in place. Remove the Tow Harness power module 25 AMP fuse for 10 seconds and repeat the test. If the problem persists, check the chassis grounds and ensure ring terminals are in full contact with the vehicle's chassis. Remove the 25 AMP fuse for 10 seconds and repeat the test.
The installation may have activated circuit protection. Start the vehicle and turn off all functions: tail (headlights), brake, and turns. Remove the Tow Harness power module 25 AMP fuse for 10 seconds and repeat the test. If power is still absent, verify the 25 AMP fuse is fully inserted with no breaks, the fuse holder is properly connected to the battery positive post, and the module is connected to B+. Use a tester or volt meter to check for voltage on either side of the yellow butt connector near the module. Remove the 25 AMP fuse for 10 seconds and repeat the test.
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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