bing tracking image
  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Universal Fit
  4. Trailer Hitch Wiring
  5. 7 Round - Blade
  6. Powered Converter
Universal Wiring Harness w/ ModuLite and Brake Controller Harness - 7-Way Trailer Connector

Universal Wiring Harness w/ ModuLite and Brake Controller Harness - 7-Way Trailer Connector

Retail:$299.51
Our Price: $156.37
You Save: $143.14
Custom Fit Vehicle Wiring
This item qualifies for Free Shipping
Shipping Weight: 7 lbs
Quantity: 
22551 - Powered Converter Tekonsha Custom Fit Vehicle Wiring
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Need help with installation?
Locate installers near me
Install this splice-in 7-way, RV-style trailer connector on your vehicle with a multiplex or PWM wiring system. ModuLite draws power directly from the battery to avoid overloading your vehicle's circuits. Brake controller wiring harness included. 1-800-496-5010 to order Tekonsha custom fit vehicle wiring part number 22551 or order online at etrailer.com. Free expert support on all Tekonsha products. Guaranteed Lowest Price and Fastest Shipping for Universal Wiring Harness w/ ModuLite and Brake Controller Harness - 7-Way Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (7)
  • Q & A (0)
  • Photos
  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring

  • Universal Fit
  • Trailer Hitch Wiring
  • 7 Round - Blade
  • Powered Converter
  • Tekonsha

Install this splice-in 7-way, RV-style trailer connector on your vehicle with a multiplex or PWM wiring system. ModuLite draws power directly from the battery to avoid overloading your vehicle's circuits. Brake controller wiring harness included.


Features:

  • Provides a 7-way, blade-style trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 4-pole, 5-pole, and 6-pole adapters (sold separately)
  • Splices into vehicle wiring
    • Run body harness up to car battery
  • Included ModuLite ensures that your vehicle's wiring matches that of your trailer
    • Powered module connects directly to battery to avoid overloading vehicle's electrical system
  • Works with 2-wire, 3-wire, PWM, and multiplex wiring systems
  • Includes harness with 4-pin connection point for plugging in a brake controller wiring adapter (sold separately)
    • Protective cable sleeving is durable and insulated
  • Supplies required fuses, circuit breakers, wire taps, and additional hardware


Specs:

  • Maximum amperage:
    • Stop/turn lights: 4.2 amps per circuit
    • Reverse lights: 4.2 amps per circuit
    • Tail lights: 12 amps per circuit
  • 1-Year limited warranty


ModuLite Powered Tail Light Converter

A ModuLite power module is built into this wiring harness. Depending on the wiring system of your vehicle, its wiring may need to be converted to be compatible with the wiring system of your trailer. This power module functions as a tail light converter to combine the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your vehicle operate.


With a ModuLite, your trailer's lights will be powered without overloading your vehicle's electrical system. Because the module draws power directly from your car's battery and bypasses the electrical routes that are used by a basic wiring harness, there is virtually no draw on your tail light circuits.



22551 Tekonsha Universal Tow Harness with Brake Control Adapter - 7 Pole - Modu-Lite

Item # 22551

Installation Details 22551 Installation instructions


California residents: click here


Customer Satisfaction Score:


Customer Reviews

Universal Wiring Harness w/ ModuLite and Brake Controller Harness - 7-Way Trailer Connector - 22551

Average Customer Rating:  4.6 out of 5 stars   (7 Customer Reviews)

Install this splice-in 7-way, RV-style trailer connector on your vehicle with a multiplex or PWM wiring system. ModuLite draws power directly from the battery to avoid overloading your vehicle's circuits. Brake controller wiring harness included.

by:

My only issue was the installation, due to the complexity of the kit my installation fees were very high. This is not a plug and go item!




by:

I installed this kit in my '69 F-100 about a year ago and is still working well with no issues. The components are high quality and the directions are reasonably clear.
My only complaint is that the main harness running to the rear bumper was WAY too short. I had to purchase separately about 10 feet of heavy duty 7 way electrical trailer wire and splice it in (14 connections total). This was time consuming since I soldered and heat shrunk the connections. What would've worked better would be to supply the harness in two segments with about 20 feet of wire and let the installer cut to length and have the single splice be inside the cab. They also supplied far too much cable to go to the battery - not sure what vehicle they based their wire lengths on but it couldn't have been a truck (maybe a motorcycle with a remote mounted battery in a trailer LOL).
Anyway - like the product and would install this again if needed.




by:

This kit was a great way for me to install a 7 pin set-up on my Sienna minivan that didn't have a custom kit available for it. At the time of purchase it was a relatively new kit to etrailer, and I had been told by etrailer that the only way to get a 7 pin on my sienna was to install a 4 pin first then an adapter (the etrailer rep. had no previous experience with this kit). By using this kit I avoided having to install the 4 pin harness first followed by the 7 pin adapter. It took me a while to find, but this kit did the trick. It's probably a little more difficult to install due to it not having custom, vehicle specific, fittings, but it's doable. I was able to find on line diagrams from toyota describing how to run a wiring harness inside of the vehicle (under the panels so there are no lines run under the body of the car). This worked out really well, and I was even able to figure out where a reverse light wire was to get that signal (seems to be commonly left out when wiring harnesses and trailers). Overall, this kit is what I needed at the time, and worked out really well (also, just checked, and there is still no custom 7 pin adapter for the Sienna on etrailer)

My only complaint with the harness kit is that the wiring supplied doesn't include a thick enough 12v trailer positive line to support vehicle charging of a trailer battery when driving. If I remember correctly, 8 gauge is what was recommended for a vehicle battery to trailer run. The harness ships with a length of 12/3 wire which I swapped for 12/2 plus 8/1 wires.
That combination, combined with CTEK40186 meant that my battery was typically charged whenever we arrived at the next spot we were going to.

One other concern I had with this kit was that my vehicle would draw power from my trailer through the 12v trailer power line, blowing the fuse any time I started my van with the trailer hooked up. I ended up adding a solenoid switch to the line so that the line wouldn't be connected during ignition. Apparently, CTEK40186, will also prevent this, but I wasn't positive, and the solenoid was a relatively easy addition - not to mention it keeps my trailer battery from charging when the van is connected to the trailer, but off.


Comments
Still working like a charm.
Dan G - 12/31/2020


by:

Thank you Steve at etrailer! Your expert knowledge and timely service exceeded all my expectations. I will recommend etrailer and all the products offered to everyone I know. Thanks again!




by:




by:




by:



7
7

See what our Experts say about this Tekonsha Custom Fit Vehicle Wiring

  • How Long is the Wiring of the Truck Bed 7-way Harness # 22551
    I spoke with my contact at Tekonsha and he said that the part # 22551 has plenty of wire for your long bed 2003 Dodge Ram 3500 long bed. This harness has 25 feet of wire from module to lead of wire to battery, 7 feet of wire from module to 7 pin connector, 6 feet of wiring from module to passenger side wiring and 14 feet of wire to go from module to driver side.
    view full answer...
  • Can Factory Tow Package Wiring and TIPM Error be Bypassed on a 2006 Dodge Ram 2500
    Since the Modulite included with hardwire kit # 22551 connects to the vehicle tail light wiring it would bypass any issues related to the tow package wiring from the factory on your 2006 Dodge Ram.
    view full answer...
  • How To Install a 7-Way Trailer Connector On a Service Body Truck with Separate Brake/Turn Lights
    In order to install a standard trailer connector on a vehicle that uses a separate lighting system you will indeed need to use a converter box to convert the wiring from separate to combined. The Universal Wiring Harness w/ ModuLite and Brake Controller Harness part # 22551 would be a great option for the hazmat trucks as this is an all inclusive kit with everything needed to not only combined the tail light circuits for the trailer connector but also install a brake controller as well...
    view full answer...
  • Can You Add A Wire Harness To A Travel Trailer To Make It Tow Another Trailer.
    You will have to use a universal fit wire harness like the Universal Wiring Harness w/ ModuLite and Brake Controller Harness - 7-Way Trailer Connector # 22551. This will only work if both trailers have LED lights. Also if your second trailer has electric brakes its going to be very hard to get power back to them to operate them. I also recommend checking local laws and regulations about towing doubles and making sure it is safe and accepted in the areas you will be in. The more length...
    view full answer...
  • Replacement for Universal Wiring Harness w/ ModuLite and Brake Controller Harness 22550
    The Universal Wiring Harness w/ ModuLite and Brake Controller Harness 22550 you purchased back in 2017 was replaced by Tekonsha with the kit # 22551. If you can test the wiring going into and coming out of the converter box then you might be able to cut and splice your connections to avoid running the new wiring but even then it might not be a bad idea to just upgrade everything while you're at it so you know you won't have to think about it for a while. Unfortunately the converter box...
    view full answer...
  • Recommended 7-way Trailer Connector Wiring and Brake Controller for 2017 Isuzu NRP HD Box Truck
    For your 2017 Isuzu NRP HD box truck, I recommend the Universal Wiring Harness w/ ModuLite and Brake Controller Harness - 7-Way Trailer Connector # 22551. This harness will give you all the wiring you need and then you will simply need to add the brake controller. I recommend the Tekonsha Prodigy P3 # 90195 which will connect directly to this wiring harness. I've attached the installation details to assist.
    view full answer...
  • Universal Trailer Wiring Harness For 1998 Range Rover
    The Universal Wiring Harness w/ ModuLite and Brake Controller Harness, part # 22551 is designed as a hardwire kit that pretty much includes everything you need to install a 7-way trailer connector on your Range Rover. The module protects your vehicle wiring and gets its power right from the battery instead of drawing power through the vehicle wiring which means no stress on the vehicle wiring. I recommend using a circuit tester like part # 40376 and test the wires on your vehicle to attach...
    view full answer...
    Image 1 for
  • 7-Way Wiring Harness for 1996 Dodge Ram
    The Universal Wiring Harness w/ ModuLite and Brake Controller Harness part # 22551 will work to add a 7-way to a 1996 Dodge Ram. This kit comes with everything you need for the above and you should not have to extend any wires. In order to have both 4 and 7-way trailer connection points, you'll also need part # HM40975.
    view full answer...
  • Hitch And Wiring For A 2007 Chevy Kodiak C4500 Bus
    For your 2007 Chevy Kodiak C4500 Bus I recommend the Curt Adjustable Trailer Hitch Receiver - 18"-51" Wide - 2" Drop - Class III - 2" Item # C13701. This hitch is a universal hitch for RVs. It is bolt on or weld on and fits frames spans between 18" and 51". For wiring I recommend the Universal Wiring Harness w/ ModuLite and Brake Controller Harness - 7-Way Trailer Connector Item # 22551. This wiring harness is a universal kit that provides the 7 pole plug plus all the wiring if you wanted...
    view full answer...
  • Can 7-Way Be Added to Freightliner Semi Truck
    We can help with a basic 7-way and wiring but we do not have anything that's going to actuate ABS brakes. You can hardwire in a 7-Way, # HM47210 though. For this 7-Way the white wire is ground, yellow is left turn signal and brake lights, green is right turn signal and brake lights, brown is the tail light wire, red is auxiliary power, blue is output to electric brakes, and purple is reverse lights. If the turn signals and brake lights are not combined on the same circuits then instead...
    view full answer...
  • Troubleshooting Blinker Changes Direction When Brakes are Applied
    It may be a bad converter box but you can check some other things before coming to that conclusion. The first thing I would check here is the 7-way connection at the back of the vehicle. Make sure no corrosion or debris is present and clean as needed. If that doesn't solve the problem, try checking the ground connection. Make sure it is secure on a clean, bare-metal surface. If need be you can move it to a new location. If that doesn't stop it, I would use a circuit tester like the #...
    view full answer...
  • Recommended Trailer Hitch Receiver, 7-Way Wiring And Trailer Brake Controller For 2015 Isuzu NPR XD
    A hitch like the Class V Universal Weld-on Receiver Hitch # 15903 is going to be what I recommend for your 2015 Isuzu NPR XD, since there are no custom fit receivers. This universal hitch will weld in place on your frame and can support up to 1,500lbs of tongue weight and a trailer up to 15,000lbs. The weld brackets are 18-1/2" long and the frame can be between 18" and 61" wide. The Tekonsha Universal Wiring Harness w/ ModuLite and Brake Controller Harness # 22551 will give you the wiring...
    view full answer...
  • Recommended Trailer Wiring Harness For A 2022 Ford E-450 RV
    Since there currently aren't any custom fit trailer wiring harnesses for your 2022 Ford E-450 RV you will have to use a universal wiring harness like the Universal Wiring Harness w/ ModuLite and Brake Controller Harness # 22551. To get both a 7-way and 4-way in one you can swap the 7-way connector from the # 22551 with the connector from the # HM40920.
    view full answer...
  • Parts Needed for Installing Trailer Hitch Wiring On a 2010 Ford Shuttle Bus Built On E-450 Chassis
    The Universal Wiring Harness w/ ModuLite and Brake Controller Harness # 22551 will allow you to install a functioning 7-way connector on your 2010 Ford E-450 shuttle bus. Since the wiring from the chassis will have been modified by the company that outfit it with the bus cab this will allow you to tap into the tail light wiring. A Test Light # PTW2993 will help you to identify the wiring to your tail lights so you tap into the correct wiring.
    view full answer...
  • Can I Add A Wire Harness To My Camper To Make It Tow Another Utility Trailer
    We highly recommend against double towing and many states either don't allow double towing or have numerous restrictions. There are some states that limit the total length of all 3 units, some only allow certain types of trailers behind the 5th wheel trailer, and some require a special endorsement on your license to be allowed to double/triple tow. I recommend checking the laws for any state you plan on double or triple towing in. You will have to use a universal fit wiring harness like...
    view full answer...
  • Replacement 7-Way Wiring and Breakaway Kit for Hurst Trailer
    If you just want to replace the trailer's 7-way blade-type wiring (but not all of its lights) you can do this most easily with a 7-way junction box like # e99011, which includes a 7-way plug and cord. Kit # e99011 also includes the necessary butt connectors and ring terminals, and wire loom too, so this will be the easier option. We also offer complete trailer breakaway systems, like the Hopkins Engager # 20099, that will activate your electric brakes in the event of an accidental disconnect....
    view full answer...
  • Towing a Trailer with 7-Way RV Style Connector with a Semi-Truck with a Semi Style 7-Way
    The 7-Way on a semi-truck is not the same as an RV style 7-Way and there isn't an adapter. What I recommend, instead of replacing the connector on the trailer, is to add the correct mating 7-Way on the truck. To do that you can hardwire in a 7-Way, # HM47210. For this 7-Way the white wire is ground, yellow is left turn signal and brake lights, green is right turn signal and brake lights, brown is the tail light wire, red is auxiliary power, blue is output to electric brakes, and purple...
    view full answer...
  • Connecting RV Style 7-Way to Semi Truck
    The connector in the picture you sent in shows a standard 7-way RV style connector which is most likely not what you have on your semi truck. The 7-Way on a semi-truck is not the same as an RV style 7-Way and there isn't an adapter. What I recommend, instead of replacing the connector on the trailer, is to add the correct mating 7-Way on the truck. To do that you can hard wire in a 7-Way, # HM47210. For this 7-Way the white wire is ground, yellow is left turn signal and brake lights,...
    view full answer...
    Image 1 for Image 2 for
  • Is Universal 7-Way Kit 22550 Compatible with Redarc Tow Pro Elite Brake Controller
    Yes the universal 7-way kit part # 22551 that you referenced is compatible with the Redarc Tow Pro Elite Brake Controller # RED44FR that you referenced as well.
    view full answer...
  • Wiring Harness and Junction Box for a DIY Trailer
    We do have a great wiring harness for DIY trailers. It is the 7-Way Molded Trailer Wire Connector, 4' Long item # H20043. The Pre-wired 7-Way Trailer Connector measures four feet long including the connector. To secure and consolidate all of your wiring connects you will want to use the Trailer Wiring Junction Box - 7 Terminal item # 3375601100. The weatherproof, heavy-duty plastic protects wires and terminals from the elements.
    view full answer...
  • Adding a 7-Way Trailer Connector and Brake Controller on a 2002 Toyota Tundra
    Universal trailer wiring harness with brake controller harness # 22551 is a universal fit type of item so there are no vehicle specific installation instructions. I have included a link to the instructions that it does have for you. Another option is to install a 4-Way first, # 118378, on your 2002 Toyota Tundra. Then you can install 4 and 7-Way installation kit # ETBC7 which will allow you to hardwire in a brake controller. I have included some links that explain and show the ETBC7 installation...
    view full answer...
  • Will the Universal Wiring Harness # 22551 Fit on a 1985 Ford F-250
    It sounds like you have a short somewhere on your trailer stop/turn circuits on your 1985 Ford F-250. The Universal Wiring Harness # 22551 will fit your pickup and provide you with the connector needed for a brake controller like the Prodigy P2 # 90885 if that is the route you are wanting to take. You can also check to make sure your current 7-Way connector is clean and free of debris as well as making sure your turn/stop circuits on your pickup don't have any shorts. By searching along...
    view full answer...
  • What is Needed to Install a Brake Controller on a 2007 Ford F-150
    The best wiring harness we have for your 2007 Ford F-150 that will allow for you to install a brake controller is the Universal Wiring Harness w/ ModuLite and Brake Controller Harness part # 22551. For a more cost effective installation kit, I recommend the Universal Installation Kit for Trailer Brake Controller part # ETBC7. Both of the above kits come with everything you'll need to install a brake controller on your truck. Regardless of which options your truck came equipped with, there...
    view full answer...
  • Comparing the Different Harnesses To Install a 7-Way On a 1999 Toyota Land Cruiser
    In order to install a 7-way trailer connector and brake controller on your 1999 Toyota Land Cruiser I recommend going with option one that consists of the T-One Vehicle Wiring Harness part # 118365 and the Universal Installation Kit for Trailer Brake Controllers part # ETBC7. This option will be easier to install and it is will be more cost effective. In regards to Universal Wiring Harness w/ ModuLite and Brake Controller Harness part # 22551, the ModuLite is really no different than...
    view full answer...


< Previous
12



Do you have a question about this Custom Fit Vehicle Wiring?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate custom fit vehicle wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B
Employee Alexander C
Written by:
Alexander C
Employee Michael B
Installed by:
Michael B

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.