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Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors

Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors

Item # HM43385
Our Price: $39.12
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Custom Fit Vehicle Wiring

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Quickly and easily install a 4-way and 7-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into OEM tow package wiring harness - no cutting or splicing required. 1-636-306-4830 to order Hopkins custom fit vehicle wiring part number HM43385 or order online at Free expert support on all Hopkins products. Guaranteed Lowest Price and Fastest Shipping for Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors. Custom Fit Vehicle Wiring reviews from real customers.
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  • Reviews (186)
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  • Why etrailer?

Hopkins Custom Fit Vehicle Wiring - HM43385

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

Quickly and easily install a 4-way and 7-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into OEM tow package wiring harness - no cutting or splicing required.


  • Provides both a 7-way RV-style and a 4-pole flat connector at the back of your vehicle to power your trailer's signal lights
    • Designed for use with a factory tow package
    • Compatible with 5-pole and 6-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing
    • Locate connection points at the rear of your vehicle
    • Plug in connector
  • Includes mounting bracket
  • Protective connection terminals resist corrosion
  • Comes with dust cap for connector and terminal grease packet for electrical connections
  • 90-Day limited warranty


This custom-fit T-connector plugs into your vehicle's factory tow package wiring harness, which is located at the rear of your vehicle, slightly toward the driver's side.

Once installation is complete, the connectors will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket is included to keep the connectors secure.

It is recommended that you use a small amount of grease on all electrical connections - the plugs on your automobile and the 7-pole and 4-pole connectors - to help prevent corrosion.

Vehicle Wiring

Note:Refer to the diagram above to determine if this harness will fit your application. The plugs on your vehicle must have 3 terminals on one side and 4 on the other. If your vehicle has 2 terminals on one side and 5 on the other, you will need wiring harness HM11143395 instead.

43385 Plug-in Simple Hopkins Multi-Tow T-Connector with 4-Pole and 7-Way Trailer Connector

Installation Details HM43385 Installation instructionsAlternate Instructions HM43385 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors - HM43385

Average Customer Rating:  4.7 out of 5 stars   (186 Customer Reviews)

Quickly and easily install a 4-way and 7-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into OEM tow package wiring harness - no cutting or splicing required.


This item was on back order. Their sales representative called me communicated when it was going to arrive. This item arrived yesterday. I just installed it, works great easy to install.


I received the wrong item initially BUT etrailer was awesome at addressing the issue and quick follow up. Will use them exclusively for future items because of that, good prices and quick delivery.


Great product. I don't need my adapter anymore. Wiring harness was a perfect fit for the Toyota OEM plugs.


Really quick shipping and provided me with both 4 pin and 7 pin connections. Better than factory.


The plug-in wiring harness was just like the factory one , that was on my truck. It plugged into the electrical connectors with no problem. I am glad that I found this website and order it.

2006 Toyota Tundra

After damaging my existing 7-way connector on my 2006 Tundra I decided to take on the task of replacing myself. After some reviews I chose the Hopkins 7-way with 4-way connector. Super easy install as it was just plug and go. One needs to make sure of your current wiring especially on the 3 wires (12-v, electric brake, backup). One minor inconvenience was that I had to drill out the holes in the bracket which connects to the bumper. Not a big deal. Excellent product and look and the added 4-way is a nice bonus. Will definitely recommend the product and etrailer.


03/17/22 my order was spot on trailer harness worked perfectly easy install and great price!! Toyota wanted $307 where i live have not used yet but sure it will be fine thanks will order from you again when needed

2006 Toyota Tundra

This is a perfect replacement for the stock Toyota 2006 Tundra, it is higher quality than the original, and at a fraction of Toyota's price. Replacing the old part was trivial. Etrailer's service was exceptional: it was shipped within hours, I received tracking information promptly, and the shipping cost was very modest.

2005 Toyota Tundra

I had some damage to my original trailer wiring on my truck, I worked on it for hours trying to repair the damaged wiring, working overhead crimping wires cutting back damage etc. and still not fixing the problem,
This unit I was done in 20 minutes, and it works perfect.


perfect fit.Easy installation


Great product and fit!!! Needed to drill new holes for mounting bracket, but easy enough to do. After that was done, everything went perfect. Simple plug in connection on truck if you have factory towing package. I had done in about 30 mins.

2006 Toyota Tundra

easy install, everything fits


Great service, quick shipping, plugged right in like OEM, the pictures on the site helped me decide it was a match, I used 2 - M6 Rivnuts and screws to mount the harness to my new hitch.


It was good at first but doesn’t work a nymore


Great product! But it was not for exact my model… I did some custom connections myself!
Call to company before you make another order…

2006 Toyota Tundra

My original connector was damaged. I was looking for a replacement at a good price - Toyota wants $300 for this part.

I love that etrailer was a good price, but especially like how they have pictures that are different than the stock photos other online retailers use. I was able to see that the bracket was included in this - no need to buy anything else.

The price here was fantastic, not only did it beat [the other online retailers], but it was one of the least expensive around.

After placing my product I was notified quickly that it shipped - and I even got tracking information. My recent purchases online seem to think that extra step isn't necessary - and only give me info if I asked for it.

The product installation was easy. Several reviewers said I'd need to make the holes in the brackets larger. Yes, I needed to. I just got my drill out and used a slightly larger diameter bit to widen the holes. I then used the OEM holes and bolts. It fits well, plugged in just fine. It looks solid and has weather resistant covers for the two plugs. It's also super that both plug types are included - I no longer need that bulky 4->7 wire plug adapter.

Great product, easy installation, great price, perfect shipping! Thank you etrailer!

The trailer harness is working very well. I just used it last month for towing a car home. I like the fact that it’s a single connection and stays closed and out of the weather. I appreciate you following up with me. I’m glad I did business with you.
Erik T - 04/08/2019

2007 Toyota Tundra

5 star services. An incorrect part came in, with no questions asked they shipped me another within two days! Customer service was top notch as well!! I'll be making more purchases in the future


Did not fit.

Would you be able to give me more details as to how this did not work for you?
-- Etrailer Expert Brooke M - 06/07/2022
Yes, I have a o seven tundra. I have a five prong and a two prong. I look up another one thought maybe this would be the part # HM11143395. Could u send me the right one ? And could I return this one as exchange. Do u have a return label so I can send this one back?
-- comment by: Lisa - 06/10/2022
Yes, it looks like # HM11143395 is right one for you. I will let our customer service team know about all this and they will have someone reach out to you soon.
-- comment by: Brooke M - 06/15/2022

2010 Toyota Tundra

Mounted on my 2003 tundra as a direct replacement for the original receptacle. plugs snap in to the harness as good as they would be expected. The bracket has drill holes in the correct place, just needed to be drilled out to fit the oem bolts. It comes with smaller screws to replace the bolt hardware, if your threads are stripped out. took me 30 minutes to install, I reused the old plastic snap on pieces. If I didn't you could do the job in 10 minutes.

great product, although we havent towed a trailer the connector has withstood winter snow by staying in one piece.
mike f - 02/25/2018


Wrong one. What part do I need? The pic shows my truck end plugs. ??


This is absolutely a great product at a fair price. In fact, it is better than the OEM in that it has the 4 - wire adapter on the side, so no need to carry the plug in adapter when pulling a smaller trailer without brakes. Installed in minutes with the factory connectors. Been using it for a year now and happy with it.

The harness has worked very well for me! Happy to say I dont have to worry about it... was very well made and performs its job without any trouble. Thanks for marketing a fine product.
Tom - 02/25/2019


This connector and harness matched up perfectly with my 05 tundra wiring and connectors. Very happy with the quick delivery as well. Thanks etrailer!!

2006 Toyota Tundra

My 2006 Tundra’s factory harness kicked the bucket so this seemed like a great alternative. Installation was the exact reverse of removal of the OEM harness. I did have to drill out the mounting holes a bit to match the original bolts on the truck, but that only took a couple minutes. The separate 4-pin is very convenient and keeps me from needing an adapter. It’s not quite the factory look, but still very neat and clean (maybe it’s just because the rest of the truck isn’t as new and shiny anymore). Overall I’m very happy with the connector!

Connector is still working perfectly. I trailer about every two weeks and just hit it with some grease now and again to keep the connection clean.
Kevin S - 08/30/2020

2006 Toyota Tundra

Nice product. Fast shipping. Plug looks like a factory OEM part. Installation was super easy.

2006 Toyota Tundra

This Hopkins unit is the second I am buying, for a different truck. Like it much better than the competition due to durability of the unit construction and solid electrical connections.

Show More Reviews

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

  • Tips for Seperating Connectors of Hopkins 7-Way Wiring Harness # HM43385
    The latches of the # HM43385 are reverse cam latches. Basically you will have to press down on the latch on the male side of the connector while pulling out at the same time. Sometimes connectors can be difficult to separate. I have found that if you press down on the release and then use a wide flat screwdriver between the two connectors to pry them apart that usually does the trick. A twisting motion with the screwdriver should do the trick.
    view full answer...
  • How to Identify and Order a Replacement Trailer Connector
    We can help you select a replacement trailer connector, and yes, you can submit a photo if you like. You can also use our Fit Guide to enter your vehicle information to see the trailer wiring items we offer. Since I do not know if you need vehicle-side or trailer-side connectors, or what type of connector, I have linked our main page for wiring where you can enter your vehicle information (if you need a vehicle harness) or select the type of trailer wiring you need. Please feel free...
    view full answer...
  • Are the 7-Way and 4-Way Next to Each Other on the Hopkins Connector HM11143395
    The 7-way and the 4-way on the Hopkins Multi-Tow 7-Way Blade and 4-Way Flat Trailer Connector # HM43385 that you referenced are right next each other. If you check out the picture I attached you will see how close they are. You should have no problem fitting a 7-way and a 4-way connector next to each other.
    view full answer...
    Image 1 for
  • Tips for Getting Connectors Apart For Installing # HM43385 Wiring Harness
    The latches of the # HM43385 are reverse cam latches. Basically you will have to press down on the latch on the male side of the connector while pulling out at the same time. Sometimes connectors can be difficult to separate. I have found that if you press down on the release and then use a wide flat screwdriver between the two connectors to pry them apart that usually does the trick. A twisting motion with the screwdriver should do the trick.
    view full answer...
  • Can 12 Volt Power Circuit be Used for Powered 30 Amp Trailer Winch
    For a 30 amp circuit you need at least 10 gauge wire like what the Hopkins Toyota 7-Way part # HM43385 has for the 12 volt power circuit. So this will work fine to power your trailer winch.
    view full answer...
  • Replacement Hopkins 7 and 4-Way for 2006 Toyota Tundra
    There isn't a replacement housing for the # HM43385 that you have so you'll have to replace the entire thing since yours has been damaged. It's easier than you'd think to break them while backing up for sure since they typically hang down lower than the bumper. For a backup camera you can use the purple wire of this adapter as that carries the reverse light circuit.
    view full answer...
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  • Which Replacement 4-Way and 7-Way Trailer Wiring Harness for a 2007 Toyota Tundra
    The part you have selected, the Hopkins Tow Package Wiring Kit for Toyota Tundra, part # HM11143395, is specified for 2008 - 2010 Toyota Tundra trucks. This part has two grey connectors to couple with the factory wiring; one is a 2-wire rectangular connector and the other a 5-wire square connector. It will be a good idea to inspect the existing connectors on your Tundra to confirm the number of wires going to each so that you are certain of the replacement. Toyota did make some running...
    view full answer...
    Image 1 for
  • Will Hopkins Plug-In Simple Vehicle Wiring Harness # HM43385 Replace Factory Toyota 7-Way
    If you have a 2003-2006 Toyota Tundra the 7-way wiring harness part # HM43385 that you referenced would essentially be the exact same thing as going with the Toyota brand connector. Most likely the Toyota connector does not have the 4-way option that comes with this as well. This will most likely be less expensive too.
    view full answer...
  • Needing to Wire a 7-Way Connector to a 2004 Toyota Tundra
    On your 2004 Toyota Tundra, there are two possible 7-way connectors that could work on your vehicle. Up under the rear of your truck there should be two plugs that you will need to plug in the 7-way. One plug will be connected to your current 4-flat plug. This plug have 4 wires going into the plug. the other plug will have either a 2 wire or a 3 wire plug. This plug will run from the brake control wiring to the 7-way. If you have the 2 wire plug, then you will need # HM11143395. If your...
    view full answer...
  • 4-Way And 7-Way Adapter For 2014 Toyota Tundra
    If you have a 7-way connector on your 2014 Toyota Tundra, the harness I recommend is the Hopkins Custom Fit Vehicle Wiring, part # HM11143395. Both the 4-way and the 7-way connector are active at the same time on the harness. You may want to check your Tundra owner's manual for any information as to its wiring capacity to avoid any potential for overloading the vehicle circuit.
    view full answer...
  • Compatibility Of Hopkins Smart Hitch Camera And Factory Tow Package 7-Way Connector # HM43385
    The Hopkins Smart Hitch Backup Camera and Hitch Aligner System # HM50002 is not directly compatible with the Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors # HM43385. By this, I mean that the T-connectors will not work because the back of the 7-way is molded. To make them easily compatible, you can simply splice into the reverse wire function and ground to hardwire these two harnesses. This will make them compatible with each other...
    view full answer...
  • Correct Replacement Trailer Wiring Harness for a 2007 Toyota Tundra
    The correct replacement trailer wiring harness for your 2007 Toyota Tundra is the Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package part # HM11143395. This harness is designed for the models with a 5-pin and 2-pin connector. If you had the 3-pin and 4-pin connectors you'd use part # HM43385 instead.
    view full answer...
  • Replacement Trailer Wiring 7-Way Recommendation For A 2007 Toyota Tundra
    For your 2007 Toyota Tundra the direct replacement for Toyotas part 82169-0C040 is The Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat # HM11143395. This harness connects quickly and easily with no cutting or splicing. It includes the mounting bracket. I attached an installation video link below.
    view full answer...
  • Replacement 7-Way Trailer Connector for a 2004 Toyota Tundra with Factory Tow Package
    I have included a picture for you that will help. On your 2004 Toyota Tundra, find the connector under the truck that # HM43385 would plug into. Then use a circuit tester, # PTW2993 if you do not have one, to test the pins on the 3-pin part. The pins should be a mirror opposite of what you see in the picture. If they are not you would need to use # 20137 instead. The wiring harness part of either of these connectors should be plenty long enough to mount the connector where you need to....
    view full answer...
    Image 1 for
  • Replacement 7-Way Recommendation for 2007 Toyota Tundra
    Sounds like you are in need of a replacement 7-way for your 2007 Toyota Tundra. For that all you'd need is the part # HM43385 and you'd be set. This will plug into the square connectors your current trailer wiring has and you'd just need to mount in and you'd be set.
    view full answer...
  • How to Install a 7-Way on a 2010 Ford F150 with a Factory 4-Way
    To install a 7-way in your 2010 Ford F-150 with a factory 4-way all you would need is the # 37185. This will plug into the 4-way you currently have and will give you both a 4-way and a 7-way at the rear of your truck. To complete the 7-way wiring you will need to tap into a couple wires under the rear of your truck. Follow the 4-way trailer connector wires from the trailer connector to the front of the vehicle. These wires connect to a factory plug along the frame rail, usually on the...
    view full answer...
    Image 1 for Image 2 for
  • 7-Way and 4-Way Recommendation for a 2001 Toyota 4Runner with a 4-Way for Trailer Lights
    Since you have a 4-way currently installed on your 2001 Toyota 4Runner, need a 7-way that will also retain a functional 4-way, and don't need to operate trailer brakes your best option would be the part # 37185. Your 4-Way will plug into this adapter and it will give you a 7-way and a 4-way that will operate the trailer taillights.
    view full answer...
  • 7-Way and 4-Way Trailer Connector for a 2004 Toyota Sequoia with 7-Way and Different Pin Out
    For your 2004 Toyota Sequoia you would want the part # 20137 to give it a 7-way and a 4-way. We have heard of the pin outs on the connectors being different so what you would need to do is cut the wires of the connector so that they match what your vehicle has. I wish we had a separate connector for the different pin outs but at this time we do not.
    view full answer...
  • Using Hopkins # HM43385 or Tow Ready # 20137 Replacement 7-Way Connector on 2006 Toyota Tundra
    There is a difference between the Tow Ready # 20137 and the Hopkins # HM43385. Each trailer connector uses two plugs that insert into the factory connections, but the 3 pin plug on each is wired DIFFERENTLY. For some unknown reason, Toyota wired the plugs differently on some vehicles. If you look at the photo I've edited for you, you can see the difference. The replacement 7-way you use will depend on how your 3-pin plug on your Tundra is wired. Use a circuit tester like # 40376, and...
    view full answer...
    Image 1 for
  • Can a Gooseneck Wiring Harness Tee Into the Back of a 7-Way Connector on a 2006 Toyota Tundra
    I went out to the warehouse to examine 2006 Toyota Tundra Hopkins Multi-Tow 7-Way Blade and 4-Way Flat Trailer Connector # HM43385. The back of the 7-Way part is molded and all one piece so it cannot be disconnected to allow a gooseneck wiring harness to be Teed in. This is common on the 7-Ways available for this truck. There is a possible solution though. You could mount the 7-Way part of extension # 20027 in the truck bed, route the cable and connector over near the factory 7-Way connector...
    view full answer...
  • Replacement 7-Way and 4-Way Trailer Connector for a 2007 Toyota Tundra
    We do have a replacement 7-way and 4-way trailer connector for the 2007 Toyota Tundra, but before we can determine which harness will work for your truck, we will need to know what type of plugs your trucks tow package wiring requires and how the connectors are wired. Unfortunately, Toyota decided to wire this truck a number of different ways. The Tundra had a generation change between 2006 and 2007 and this caused some discrepancies in the wiring. Your factory 4-way and 7-way trailer...
    view full answer...
    Image 1 for Image 2 for
  • Replacement 4-Way Connector for 2006 Toyota Tundra
    I may have a solution for you, but we do not have a standard factory replacement 4-Way available for your 2006 Toyota Tundra. We do have the Hopkins Plug-In Simple Vehicle Wiring Harness # HM43385 for your Tundra that will work if you have the correct factory ports at the rear of your truck. I have attached an image that shows the mating connectors on this harness. If the factory plugs under your vehicle match this image, then this will work great and provide you with both a 7-Way and...
    view full answer...
    Image 1 for
  • Trailer Wiring Recommendation for a 2011 Toyota Tacoma
    The picture you submitted looks like a connector for an intermediate harness for a 7-way on your 2011 Toyota Tacoma. Most likely he went to take the 7-way off of his truck and instead of just removing the connector he went further up the wiring and removed an OEM Toyota harness. We can't get that harness, but if you go to a Toyota dealer they will be able to get you the harness. From there you could their 7-way or get ours part # 74682 that also has a 4-way built into the side of it. Be...
    view full answer...
    Image 1 for
  • Replacement 7-Way Trailer Socket for 2006 Toyota Tundra
    If your 2006 Toyota Tundra had a factory-installed 7-way trailer socket that needs replacement I recommend the Hopkins Multi-Tow 7-Way Blade and 4-Way Flat Trailer Connector # HM43385. This plugs in to the factory wiring using two connectors; the mating connectors on the Hopkins part are shown in the linked photo. If your truck instead happens to have a round U.S. Car Connector at the rear bumper then I suggest instead Pollak part # PK11893 which will plug in to that connector.
    view full answer...
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