bing tracking image
  1. Custom Fit Vehicle Wiring
  2. Tekonsha
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. 7 Round - Blade
Multi-Plug T-One Connector Assembly for 7-Way & 4 Pole Trailer Connector

Multi-Plug T-One Connector Assembly for 7-Way & 4 Pole Trailer Connector

Item # 20135
Our Price: $41.00
You Save: 42%
Custom Fit Vehicle Wiring

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

Orders above $50 qualify for Free Shipping
Shipping Weight: 1.36 lbs
In Stock
Custom Fit Vehicle Wiring 20135 - No Converter - Tekonsha
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

Customer Photos

Need help with installation?
Locate installers near me
1-636-306-4830 to order Tekonsha custom fit vehicle wiring part number 20135 or order online at Free expert support on all Tekonsha products. Great prices and Fastest Shipping for Multi-Plug T-One Connector Assembly for 7-Way & 4 Pole Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (63)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

Tekonsha Custom Fit Vehicle Wiring - 20135

  • Custom Fit
  • Trailer Hitch Wiring
  • 4 Flat
  • 7 Round - Blade
  • No Converter
  • Tekonsha

Tow Ready Replacement 7-Way Flat Pin and 4-flat Combo Adapter Harness for Vehicles with a Factory Socket

  • Ability to tow trailers with different style trailer connectors
  • Durable plastic shell
  • Provides both a 7-Way and a 4-Way covered trailer connector
  • Mounting bracket included
  • Replacement socket for vehicles with a factory 7-way

20135 Multi-Plug T-One Connector Assembly for 7-Way & 4 Pole Trailer Connector

Installation Details 20135 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Video of Multi-Plug T-One Connector Assembly for 7-Way & 4 Pole Trailer Connector

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Tekonsha Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 20135 Review

Today, we're going to review part number 20135. This is the Tow Ready multi-plug OEM replacement harness. This kit will let you add a 7 way RV style trailer connector and a 4 way connector to your vehicle. It has the factory tow package. This is a custom fit part number. It is designed to plug into a Dodge, Chrysler, Jeep, and Mitsubishi vehicles, starting in the year 2000, that have the factory 7 way connector.

I would recommend this to go to our fit guide on our website, and you can put in your year and model of those vehicles, and it would tell you if this would be the correct part number for your application. This is a plug in, simple installation. There's no cutting or splicing required. This wiring harness, basically, will plug into your factor wiring at the back of the vehicle. The plug right here is extremely durable ABS plastic construction. It has a nice, oversized lid hinge right up here.

It helps keep out any dirt and moisture from getting to the terminals. It also has nice, enhanced weatherproofing. They do use seals on the cap itself, and the terminals are corrosion resistant. It does include the mounting bracket and the screws. They're all included. Basically, what you would do is, before you go and plug this in to the back of your vehicle, I would take your mounting bracket, slide it on.

Slide the four way also through there. Bring it all the way up, and you can see that it will line up. The holes on the mounting bracket will line up with the holes right there. At the very top, you'll see the holes for mounting it to the vehicle. Then, what's nice is, you'll see this little cutout on the side.

Basically, that's where you can just slide in your 4 way just like that. Then, plug this in and with this plugged in, this would be at the back of your vehicle. You have access to the 7 way, and then the 4 way, just like that. That should do it for the review on part number 20135, the Tow Ready multi-plug OEM replacement harness. .

Customer Satisfaction Score:

Customer Reviews

Multi-Plug T-One Connector Assembly for 7-Way & 4 Pole Trailer Connector - 20135

Average Customer Rating:  4.8 out of 5 stars   (63 Customer Reviews)

1998 Dodge Ram Pickup

Exact same product that was in the picture arrived at my door, so the item was exactly as described. It plugged directly into my factory wiring harness on my 1998.5 Dodge Ram 2500 with a 24v Cummins. It did not fit on the factory mounting position, but mine was very bent anyway. So I cut it off and used the included mount. The self tapping screws that were supplied were not very strong, so I had to use rivets to secure the mount. But I was mounting it on the hitch receiver which is very thick steel, so it was expected. Overall, great product and works as it should.


Has held up really well. My vehicle had an aftermarket harness already installed, but the video on the etrailer site made fitting the new one in much easier. The instructional videos on this site are really fantastic.

2006 Dodge Ram Pickup

Yes, this product works great. It plugged into the factory harness. I would recommend this product


Product worked great as advertised. Simple install.


little problem hooking up to trucks wiring harness due to plastic square
connector being bent out of shape on bottom a little able to reshape and hookup,connector is a lot better quality than original one that was on truck and has 7-way & 4 pole connections makes towing different trailers easier awesome! fast shipping great price! helped me avoid dealing with dealerships high prices and delays on shipping and getting wrong product, website was easy to order from and great description of connector with good quality photos will save on my favorites and pass on to friends thank you Ross

Does this assemble connect to the wiring behind the left light assemble on the durango? want to make sure Im looking at the right thing. I need the entire assemble.
-- comment by: Jim D - 07/21/2013

2008 Jeep Liberty

This is a nice quality part I'm using to replace the OEM connector on a 2008 Jeep Liberty. I really like the way it has a four pole connector in addition to the 7 way connector which saves time and the hassle of finding the four pole adapter to plug into the 7 way socket. The OEM part that came with the Jeep was 7 way only. This is a great improvement. Fast shipping and super communication. Thanks!

nicely thanks
Rex G - 06/08/2016


These people understand customer service. I volunteer with SCORE as a small business counselor / mentor and the people at eTrailer epitomize how customer services should be handled. I requested confirmation that the part would work for my truck even though it listed several years beginning with the year after mine. They researched and determined that only the bracket would not be the same which was not a problem for me. Excellent product. Excellent service. Excellent company.

2000 Dodge Ram Pickup

Wonderful product. All I had to do was pop out the old wiring harness and plug in the new. Easy as that. Bought a travel trailer so need the 7 way, but have a boat which uses the 4 flat wire so problem solved. Happy camper and boater. Great price as well. As a ebay person I couldn't find a better deal. Now etrailer is bookmarked on my PC..

2005 Jeep Grand Cherokee

Great customer service experience! The notification and follow-up was excellent regarding receiving my order, shipping my order and delivery of my order. This particular connector was exactly as advertised and plugged directly into my 2005 Jeep Grand Cherokee Laredo's factory wiring harness. I had to make a few minor modifications installing the bracket but it worked out just fine.


Had a small trailer I would always pull my dirt bikes never had trailer lights hooked up, which is illegal, I saw a product at etrailer for Only $29 bucks ,one two three clicks ,works imperfect. Avoid getting a ticket and for safety literally takes 5 minutes I would recommend hooking up your trailer lights

2003 Dodge Ram Pickup

Shipping was fast. Got the product in good condition. Plugged right in to the factory plug like it was supposed to. Should send some dielectric grease with it but overall very pleased.

2001 Dodge Ram Pickup

This product is genius! I no longer have to carry around an adapter for my utility trailer. It perfectly connected to my 2001 Dodge Ram and installed in less than 5 minutes. I have made several purchases from and I am more than satisfied.


The trailer adapter that I received is the EXACT Factory replacement item at a very reasonable price. Much less than the dealer was charging for the exact same item. Thank You!

1999 Dodge Ram Pickup

Bought this for my 1999 Dodge Ram 2500 and it was a perfect fit. The website made it easy to find the right part for my vehicle and the delivery was quick and without delay. I would purchase again from

2003 Dodge Ram Pickup

I have not installed the product yet but I am hoping that the installation is simple

2003 Dodge Ram Pickup

Product was easy to install and a valuable addition to my truck. A well deserved upgrade to my trailer towing ability.


Easy install in my OEM footprint. Makes it easy to use either kind of trailer connector. Can't lose an adapter you do not need to use!


I don't know how to post a picture, but trust me, this thing fit my jeep perfect. it was easy to install, no hassles at all. the young lady on the phone was very helpful and was very familiar with the product. it was delivered in a couple days, and was half the price the jeep dealer quoted. this was my third order. I'm very happy with price, service, products. I give them my highest recommendation.

1999 Dodge Ram Pickup

Hooked up in seconds and works great. I have the plug temporarily attached with zip ties until I decide on a permanent mount.


Product is superior, the best 7 way that can be found it hooks right up to the wire harness easy as that hardware included is great.
Works exceptionally great. Great people at etrailer, shipping was fast.

2004 Dodge Durango

Exact Dealer Replacement Item. 2004 Dodge Durango Trailer electrical connector.

2008 Dodge Sprinter

The best " plug n play " set up. The duo set up has made it easy to tow various types of trailers

2000 Chevrolet Silverado 3500

Shipping was extremely fast. Fit perfectly. Plug matched my 2000 Dodge 3500. I didn't want to strip and clamp wires and with this factory fit I didn't have to. ( and a flat 4way to boot. )

2006 Chevrolet Silverado 2500

This was another great part from etrailer I installed it in just a few minutes on a 2006 dodge 2500 4x4

2003 Jeep Grand Cherokee

Good. Wasn't an exact fit on my jeep. I already had a bracket for the part on my car. Had to modify this piece to make it fit on the bracket already on my jeep. The plug was a good fit though

Show More Reviews

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

  • Trailer Connector with 4-pole and 7-way, Part # HM40975 for 2003 Chevy Silverado 1500
    We have exactly what you are looking for. The 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket, part # HM40975 has both the 4-pole and the 7-way trailer connector. This item would plug in to the socket located above the spare tire, it is very easy to install.
    view full answer...
  • Replacement Wiring Harness for 2006 Jeep Commander With Factory 7-Way
    The best replacement wiring harness for your 2006 Jeep Commander with the factory 7-way is the Multi-Plug T-One Connector Assembly for 7-Way & 4 Pole Trailer Connector # 20135. This connector will give you both a 7-way and a 4-way for your '06 Jeep Commander and includes a mounting bracket; it will simply plug into your factory-equipped vehicle end socket, as per the accompanying photo. I have attached a link to a video review of this product for you to take a look at as well as a link...
    view full answer...
    Image 1 for
  • 7-Way Recommendation for a 2002 Jeep Grand Cherokee
    The trailer wiring harness part # 20135 that you referenced has been confirmed as a fit for your 2002 Jeep Grand Cherokee. You can check under the rear bumper of your vehicle to see if you can find the square connector that it is designed to plug into. This product is designed as a replacement 7-way, but if you have the square connector present then it would work as well.
    view full answer...
  • Replacement 7-Way For a 2007 Dodge Ram 1500
    To replace your 7-way on your 2007 Dodge Ram 1500 from the square connector to the 7-way you would want the part # 20135. This should replace the current 7-way you have plus eliminate the 4-way that was spliced in and would work well.
    view full answer...
  • 7-Way and 4-Way Trailer Wiring Harness Recommendation for a 1999 Dodge Ram
    Yes, the Multi-Plug T-One Connector Assembly # 20135 will work to replace the 7-way on your 1999 Dodge Ram to provide you with both a 7-way and a 4-way.
    view full answer...
  • 7-Way Recommendation for a 2001 Dodge Durango with Factory Wiring
    Check out the picture I attached, if what you have on your 2001 Dodge Durango looks like it will attach to that then the # 20135 would work well on your vehicle.
    view full answer...
    Image 1 for
  • Where Does 7-Way Trailer Wiring Install on 2006 Jeep Grand Cherokee
    If you had the 7-way wiring connector on your 2006 Jeep Grand Cherokee to install the wiring harness part # 20135 the connector would be under the rear of the vehicle near the rear bumper. It would be a square connector typically found right behind the bumper.
    view full answer...
    Image 1 for
  • Factory Tow Package Left Turn Signal/Brake Light Circuit Not Working on 2000 Ford F-250
    There are separate fuses for the tow package wiring on your 2000 ford F-250. Under the hood in the power distribution box you will need to check the fuse that is in location 1. There should be a 7.5 amp mini fuse in this location. That is the one for the trailer left turn signal and brake lights. You can find the locations of all fuses/relays and their functions in the truck owners manual should you ever run into this problem again!
    view full answer...
  • Installing Brake Controller in a 2003 Dodge Ram 1500
    You are on the right track. Since your vehicle had a factory 4-way and you installed a 7-way the brake output circuit has been partially ran on your vehicle. It stops at the connector that is located under the driver's side wheel well. In order to finalize the installation you must splice into this wire and continue it back to the plug. I attached a picture that shows what the wire and connector you are looking for. I also attached a help article that details installing a brake controller...
    view full answer...
    Image 1 for
  • Trailer Tail Light Signal Not Working on 7-Way Connector on a 2002 Dodge Ram 2500
    If you have isolated the problem to the 7-Way connector on your 2002 Dodge Ram 2500 then you will want to start off by looking at the connector itself. Check to make sure that there is no corrosion built-up inside; if you find any (looks green or white) then you will want to go ahead and clean it out. If your Ram has the OEM tow package then you might need to replace your connector if you clean it out but the wiring still isn't working. Tekonsha has their Multi-Plug T-One Connector Assembly...
    view full answer...
  • 7-way Assembly Recommendation for a 2002 Dodge Ram 2500
    The Multi-Plug T-One Connector Assembly # 20135 that you referenced would be the correct part to add a 7-way and 4-way on your 2002 Dodge Ram 2500. It will simply plug into the port you found behind the rear bumper of your truck and you would be ready to go. If you have the factory tow package you should not need any additional relays unless the ones you have are damaged. We do not carry these.
    view full answer...
    Image 1 for
  • Multi-Plug T-One Connector Assembly Recommendation and Installation for a 2002 Dodge Dakota
    I attached a link to the installation instructions for the Multi-Plug T-One Connector Assembly # 20135, but installation is pretty simple as the old connector will unplug and this one will plug in it's place on your 2002 Dodge Dakota.
    view full answer...
  • Troubleshooting Right Turn Stop Signal Not Functioning on a 2000 Ford F350 7-Way
    The problem is somewhere between the 7-way connector and the wiring of your truck. You can try cleaning the pin on the inside of your 7-way. Corrosion or dirt on the pin can cause the circuit not to function. Even if it doesn't look that dirty try using some fine grit sandpaper to get the pin down to bare metal. Other places to check is the back of the 7-way. There might be corrosion there that needs to be cleaned. Also, check for exposed wire and fix as necessary. Aside from that you...
    view full answer...
  • Troubleshooting Left Turn/Stop Lights on Trailer Not Operating When Connected to 2002 Dodge Ram
    Thank you for all of the details. It sounds like the problem may be on your pickup still. You mentioned testing the pins in the 1, 3, 7, and 11 o'clock positions but if you reference the attached photo you can see that the left turn/stop pin on your 2002 Dodge Ram 1500 should be the pin in the 9 o'clock position of your 7-Way. If you test this pin and find that there is no signal then you likely have a bad fuse or relay. In the online owner's manual it looks like there is a "Trailer Tow...
    view full answer...
    Image 1 for
  • What is the Length of the T-One Connector Assembly # 20135
    I spoke with my contact at Tekonsha who said that from the back of the 7-Way connector to the tip of the plug is about 8" on the T-One # 20135.
    view full answer...
  • Replacement Trailer Wiring Connector for 2007 Ram with Factory Tow Package
    To replace the factory plug on a 2007 Ram with the factory tow package you can use the Multi-Plug T-One Connector Assembly for 7-Way & 4 Pole Trailer Connector # 20135. This is an easy to install plug and play connector and it comes with both a 4 way and 7 way to allow you to tow trailers with different connectors.
    view full answer...
  • 7-Way and 4-Way Replacement Connector for a 2003 Dodge Ram 1500
    I am sorry, but I am not showing that part Multi-Plug T-One Connector, part # 20135, is a fit for your 2003 Dodge Ram 1500. You need the 7-Way and 4-Way Replacement Connector for Dodge Trucks, part # 42145, for your truck. It will plug directly into a receptacle under the bumper on your Dodge. All you have to do is mount the connector, and you are ready!
    view full answer...
  • What Connector Is Needed To Get 7-Way And 4-Way On Back Of 2003 Chevy Silverado
    The Tow Ready Multi-Plug T-One Connector Assembly for 7-Way & 4 Pole Trailer Connector, # 20135, that you have referenced is not the correct part for your 2003 Chevy Silverado. It is for Chrysler/Dodge vehicles. The part you would need is the Hopkins Replacement Multi-Tow 7-Way and 4-Way Trailer Connectors for Ford, GM Trucks with Factory 7 Way, # 30955, that will connect to the OEM connector which is above the spare tire. That will give you a 7-Way and a 4-Way connector on the back of...
    view full answer...
  • Availability of an OEM Replacement 7-Way Trailer Connector and Wiring Harness for a 2003 Ford F-250
    While there is not a specific harness for the 2003 Ford F-250 that is an OEM replacement, I do have a solution for you. Since your truck came with a factory installed 7-Way trailer connector, you can use the Draw-Tite Fifth Wheel and Gooseneck Wiring Harness, # 20110. Instead of installing it in the bed of the truck, you would just route it to the back. I have included a video link that might help with installation.
    view full answer...
  • 7-Way Flat Pin and 4-flat Combo Adapter For 2008 Jeep Commander
    Yes, the Tow Ready Replacement 7-Way Flat Pin and 4-flat Combo Adapter Harness for Vehicles with a Factory Socket # 20135 will fit. We also recommend the # 90195 if you are in the market for a brake controller.
    view full answer...
  • Wiring 2007 Dodge Ram 3500 For Installation of Flat Bed
    We don't offer a direct part, but I know how you could fabricate a pigtail. You'd need part # 118381 that would plug inline with the harness that plugs into the rear of the 7-way. You could simply cut the 4-pole off and wire the yellow wire to the left turn, the green wire to the right turn, ground the white wire and run the brown wire to the running light and jumper it over to the running light on the other side. This set up would provide you with a quick disconnect. You'd need to wire...
    view full answer...
  • Can the Camco Quick Hose Connect Be Left On a Faucet in the Winter
    You could leave the quick hose connect # CAM20135 on the faucet in the winter. You would want to disconnect the hose from it and store the hose (with the hose end of the quick connect installed) inside. But to be on the safe side if it were me I would remove it from the faucet and then connect it to the hose end and store the hose inside.
    view full answer...
  • Recommended Trailer Wiring Harness for 2007 Jeep Liberty Sport
    For your 2007 Jeep Liberty, the wiring harness you have found in the photo is not the correct harness for your trailer wiring. The Multi-Plug T-One Connector Assembly for 7-Way & 4 Pole Trailer Connector # 20135 is the correct fit for your factory wiring if you have a factory tow package and has a rectangular shaped harness that it connects to with flat pin connections. Even without the factory 7-way the connectors will still be rectangular and have flat pin compatibility like # 118524....
    view full answer...
    Image 1 for
  • Will Wiring Harness from 2008 Jeep Liberty Work on 2005 Jeep Liberty
    I do have the wiring harness you need for your 2005 Jeep LIberty, however the harness you currently have that is designed for a 2008 Jeep Liberty will not work. This is because there was a generational change for the Liberty starting with the 2008 model year. There were enough changes with the electrical system on the vehicle that a new custom trailer wiring harness was required starting with the 2008 model, one that will not fit or work on previous model year vehicles. Your best option...
    view full answer...

< Previous
123. . .6

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

  • Why

    At 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 Mike L
Expert Research:
Mike L
Employee DeAnne T
Expert Research:
DeAnne T
Employee Robert G
Expert Research:
Robert G
Employee Patrick B
Expert Research:
Patrick B
Employee Michael H
Expert Research:
Michael H
Employee Jeff D
Expert Research:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Brandon M
Expert Research:
Brandon M
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Isabelle B
Updated by:
Isabelle B

At 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.