1. Custom Fit Vehicle Wiring
  2. Hopkins
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 7 Blade
  6. 4 Flat
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 # HM43374
lowest price pledge
Retail:$45.36
Our Price: $34.35
You Save: 24%
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 $99 qualify for Free Shipping
Shipping Weight: 1.11 lbs
Quantity: 
In Stock
Hopkins 7 Blade,4 Flat Custom Fit Vehicle Wiring - HM43374
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

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. Call 800-298-8924 to order Hopkins custom fit vehicle wiring part number HM43374 or order online at etrailer.com. 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.
  • All Info
  • Reviews (67)
  • Q & A (16)
  • Photos
  • Why etrailer?

Hopkins Custom Fit Vehicle Wiring - HM43374

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

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.


Features:

  • 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


Specs:

  • Distance between mounting holes connecting bracket to vehicle (center to center): 2-1/16"
  • Distance between mounting holes connecting plug to bracket (center to center): 1-1/2"
  • Overall harness length: 25"
  • 90-Day limited warranty


Installation

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


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.



11143374 Plug-in Simple Hopkins Multi-Tow T-Connector with 4-Pole and 7-Way Trailer Connector



This Product Fits The Following Vehicles



California residents: click here



Customer Reviews

Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors - HM43374

Average Customer Rating:  4.7 out of 5 stars   (67 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.

- HM43374
by:
2008 Toyota 4Runner

Awesome likes always when ever I order from etrailer.com I will be ordering lots more 487503



- HM43374
by:
2006 Lexus GX 470

Simple plug & play for my vehicle, a 2006 Lexus GX470, with factory-installed wiring. Two cautions for my fellow GX owners: 1. Check your exiting connections before purchasing. I have a male 3-way and female 4-way harness on mine, and the Hopkins harness fits it PERFECTLY, but the Tekonsha Tow Ready harness that also fits SOME first-gen GX's, has male connectors on both of it's pigtails and is WIRED DIFFERENTLY. 2. Now having been through this twice, if you don't have access to a lift, I've found that by first removing your spare tire and getting it out from under the vehicle (yes, it's a PITA), you have PLENTY of room to work under the vehicle without jacking it up. You also gain PLENTY of room to see what you're doing and for routing the harness. This harness is far longer than the Tekonsha, so your options for mounting the interface are enhanced. A BIG THANK YOU to CSR Leeza, who took care of an error that I made immediately and shipped me the correct part, which arrived a day earlier than expected. Etrailer's CS team is first-rate!! 446109



- HM43374
by:
2007 Toyota 4Runner

Whenever it rained or got wet from snow it shorted until it dries out so I only put it on when I use it. 556567


Comments
If you use some dielectric grease like part # 11755
Dielectric Grease for Electrical Connectors, 2 oz.
$11.27
in both the plugs that connect to the vehicle and the connector where the trailer plugs in, moisture would be excluded from the connection,which would prevent anything from shorting out.
-- Mike L - 08/23/2018

42721

- HM43374
by:
2007 Toyota 4Runner

Installed and used maybe 6 times, used protective cover every time. 4 way connector melted 5 months later, only warrantied for 3 months. Very disappointing. 568650


Comments
If the 4-pole portion of the trailer connector melted, this would typically be caused by a short circuit in the lighting circuits on the trailer. I spoke with the Tech Department at Hopkins, who agrees. Id recommend closely examining the lighting circuits on the trailer, beginning at the trailer connector, working your way rearward to each lamp. Look for pinched wires, loose connections or cracked or worn wire insulation. Once you locate the short, repair that section of wire and you should be okay going forward. Ill link you to a trailer wiring troubleshooting article that you might find helpful as well.
-- Mike L - 09/25/2018

44007

- HM43374
by:
2005 Lexus GX 470

Ordered a replacement trailer light wiring harness for a 2005 Lexus GX 470 factory tow package. Arrived in 3 business days. Replacement worked perfectly. Just unplugged the existing wiring harness tucked up by the spare tire and plugged in the new one. Harness was long enough to work with and is a nice sealed unit. 4 stars because the mounting holes do not line up with the existing bracket. There is a bracket included, however disassembling a rusted bracket under the vehicle was not my first choice. Ended up drilling out new holes in the old bracket to mount the assembly. 270868



- HM43374
by:
2006 Lexus GX 470

I needed to replace the trailer wiring receptacle on my Lexus GX470 and I was pleased to find this one. Since it has connectors I didn't have to lie under the car splicing wires. Another benefit was that the wire harness was longer than stock so I was able to install it in a more convenient location on the bumper. 883857



- HM43374
by:

Easy to install, connections snapped right together, works perfectly! 806387



- HM43374
by:
Lexus GX 470

Overall it is very well made with solid components. However, the mounting bracket holes do not line up with the GX470 OEM hitch holes as advertised. 764362



- HM43374
by:

It has been working fine. Also easy to install. 762634



- HM43374
by:

Fantastic replacement for the stock harness that did not include the 4-flat. Works great. High quality execution. I had to fabricate a mount for it for my custom steel bumper and it handles the mud and the elements well. Mine is tucked away so it's not susceptible to direct hits but it has held up well to the abuse of rock crawling. 740147



- HM43374
by:
2006 Lexus GX 470

It’s a wiring harness that works. Plug and play at a great price. 688275



- HM43374
by:

Thank you for the great Service, and product. i will use your service again soon. Regards 675346



- HM43374
by:

Still works as intended but had to be mounted to the bumper as holes did not match original bracket. 661574


Comments
The ground pin on the 4-flat connection broke off. I had to get a adapter to use the five pin connection.
J - 06/23/2020

81835

- HM43374
by:

Perfect replacement for OEM setup. 660806



- HM43374
by:

Perfect solution for LexusGX470, plugged right into the factory rear light harness on the left rear and mounted perfectly into the draw bar. Highly recommended.. 641308



- HM43374
by:

I like it. Thanks 637053



- HM43374
by:

Good fit. No problems after a year. 634969



- HM43374
by:

Very easy to install, fits great 605821


Comments
Still great, no problems
Brian H - 02/18/2020

69923

- HM43374
by:
2003 Lexus GX 470

Works as advertised. I purchased it for my 03 Lexus GX470. Easy to install. 600914



- HM43374
by:

Easy to install and works great. What more is there to say? 583704



- HM43374
by:
2005 Lexus GX 470

Plugs were spot on I wasnt too impressed w the bracket or tiny screws and nuts All in all replaced what was there 562937



- HM43374
by:
2005 Toyota 4Runner

I haven't yet installed the part, but it looks well made. However, my understanding was that dialectric grease was included, which was not. Disappointed about that. 560644



- HM43374
by:
2004 Toyota 4Runner

Works perfect. 560264



- HM43374
by:
2006 Toyota 4Runner

Perfect fit for my 4runner. Easy installation and works great. Thanks 525897



- HM43374
by:
2005 Lexus GX 470

Bracket provided with kit will not work with Drawtite hitch for a Lexus GX 470 517508


26
68
Show More Reviews

Ask the Experts about this Hopkins Custom Fit Vehicle Wiring

  • Troubleshooting Hopkins Plug-In Connector Not Working on 2003 Lexus GX 470
    The Hopkins Plug-In Simple Vehicle Wiring Harness # HM43374 is the correct wiring if your 2003 Lexus GX 470 came with the factory 7-Way and should be used as a replacement. If your vehicle didn't come with the factory 7-Way then the only way that I know how to help you is to offer the Tekonsha Upgraded Modulite Vehicle Wiring Harness Kit # 119147KIT which comes with just the 4-Way but does require splicing for the installation. If your GX 470 did come with the factory 7-Way the only...
    view full answer...
  • Trailer Wiring Recommendation for 2007 Toyota 4Runner that Has Two Connectors
    Hey Anna, we have just what you need to activate the trailer wiring on your 2007 Toyota 4Runner and will plug right into the two connectors you have pictured (thanks for that by the way). What you need is the Hopkins part # HM43374 which gives you both a 7-way and a 4-way.
    view full answer...
  • Trailer Connector for 2004 Lexus GX 470 with Factory 7-Way
    From the picture you sent in it looks like you are needing the Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package # HM43374 for your 2004 Lexus GX 470. This gives you both a 4-Way and a 7-Way connector for various trailer applications.
    view full answer...
  • 7-Way and Brake Controller Recommendation for 2003 Lexus GX 470
    For your 2003 Lexus GX470 the Hopkins 7-way part # HM43374 is the correct fit and would plug right into the two connectors you sent in a picture of. No cutting or splicing required. Then to install a brake controller all you need is a quick install harness like the part # 3040-P with a Tekonsha controller like our best selling P3 part # 90195 and you'd be set.
    view full answer...
  • 7-Way Recommendation for a 2005 Lexus GX 470
    If your 2005 Lexus GX470 came with a factory 7-way the part # HM43374 that you referenced would plug into the same connectors that the factory one plugged into. If your vehicle didn't come with a trailer connector you would need to first start with a 4-way like part # 119179KIT. Now if your trailer does not have brakes all you would need is the part # 37185 as an adapter to convert the 4-way to a 7-way. If you do have trailer brakes you would need the # ETBC7 instead of the #...
    view full answer...
  • Replacement Trailer Wiring for 2006 Lexus GX470 with Factory Tow Package
    For your 2006 Lexus GX470, it sounds like you are looking for the trailer wiring. You mentioned the factory tow package so it likely had a factory 7-way. If that is the case, then you will simply need the Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors # HM43374 which connects to the factory wiring harness already present near the driver's side frame rail in the rear. This connector has the 4-way wiring connection you will use on the...
    view full answer...
  • Parts Needed To Tow a Trailer with Brakes Using a 2003 Toyota 4Runner
    The parts needed to tow a trailer with a 2003 Toyota 4Runner will vary based on options such as whether or not you have the factory tow package which would have came with a factory 7-way at the rear. I have attached a list of each option below but chances are you don't have the factory tow package. With Tow Package: Hopkins Plug-In Simple Vehicle Wiring Harness part # HM43374 Hopkins Agility Trailer Brake Controller part # HM47294 Hopkins Plug-in Simple Brake Wiring Adapter part #...
    view full answer...
  • Adding a 7-Way Trailer Connector to a 2008 Toyota 4Runner
    If your 2008 Toyota 4Runner did not come with a factory installed 7-Way at the back, you will have to hardwire one in. The first step though is to install a 4-Way flat trailer connector using # 119178KIT. I have linked the instructions for you. Then you can install a 7-Way and make it fully functional using # ETBC7. This comes with the 7-Way and all the wiring and accessories to install it. I have included some links that explain the ETBC7 installation.
    view full answer...
  • Trailer Lights Not Working with Hopkins Trailer Connector on 2004 Toyota 4Runner
    The Hopkins Multi-Tow 7-Way Blade and 4-Way Flat Trailer Connector # HM43374 referenced in your question is confirmed to fit your 2004 Toyota 4Runner as long as it is equipped with the factory tow package. Since the trailer lights work fine when connected to your wife's vehicle, the issue certainly seems to be on the vehicle side of your 4Runner. I recommend testing the wires just behind the connector with a circuit tester like # PTW2993. If you are receiving power at the wires, then...
    view full answer...
  • Mounting Bracket # PK12711U Recommendation for a 2008 Toyota 4Runner
    If you are looking for a mounting bracket for the Hopkins Trailer Connector # HM43374 that you referenced you could get a Mounting Bracket # PK12711U. This bracket is designed to attach to the rear bumper of a vehicle and should work well on your 2008 Toyota 4Runner.
    view full answer...
  • Will Hopkins Multi-Tow 7-Way/4-Way Flat Trailer Connector # HM43374 Fit 2010 Toyota 4Runner
    The wiring harness you referenced, Hopkins Multi-Tow 7-Way/4-Way Flat Trailer Connector # HM43374, will fit the 2003 - 2009 Toyota 4 Runner with the factory tow package, but it is not a specified fit for your 2010. The link provided will let you see all wiring harness options for your 2010 4Runner with factory 7-way. For a combination 7-way/4-way trailer connector similar to the Hopkins you can use # HM40975 from Curt. This plugs in under the vehicle on the driver's side.
    view full answer...
  • Mounting Bracket Adapter to Draw-Tite Hitch # 75155
    The Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors # HM43374 will use a standard bracket like the one that came with it. This is a standard fit if you use a bracket like # 18140 or # C57202. The mounting bracket on your trailer hitch receiver # 75155 is a fit for the factory wiring harness only as you can see in the attached video. Other options are the # C58000, # 18159, and # 18157.
    view full answer...
  • Recommended Draw-Tite Trailer Hitch for a 2007 Lexus GX470
    I have a solution for you, but unfortunately, The Draw-Tite Max-Frame Trailer Hitch Receiver, # 75685, you asked about is not a fit for your vehicle. That hitch is a fit for only 2010-2016 Lexus GX 460 models. For your 2007 Lexus GX 470, I would recommend the Draw-Tite Class III Max Frame Round Tube Receiver Hitch, # 75155. This trailer hitch is a custom fit, designed specifically for your vehicle and actually exceeds the weight ratings on the Draw-Tite Trailer Hitch # 75685 you asked...
    view full answer...
  • 4-Way Trailer Connector for a 2004 Lexus GX 470
    The T-One # 118245 that you referenced will fit a 2004 Lexus LX 470 or RX 300 but for your GX 470 you need the universal harness # 119179KIT or # 119147KIT if your vehicle didn't come with the tow package. If your Lexus is the GX 470 and it did come with the tow package and you are wanting to use a 4-Way instead of a 7-Way then you can use the Hopkins Plug-In Simple Vehicle Wiring Harness # HM43374 instead which has both a 4-Way and a 7-Way connector.
    view full answer...
  • Replacement 7-Way Trailer Socket for Factory Connector on 2008 Toyota 4Runner
    We do offer a replacement 7-way/4-pole trailer socket to replace the factory-installed part on your 2008 Toyota 4Runner. Hopkins offers their Connector with Mounting Bracket Kit, part # HM43374, which is a direct factory replacement. This socket installs using the two included connectors which match those on the vehicle. The linked photo illustrates those two connectors on the replacement 7-way.
    view full answer...
  • Recommended Trailer Wiring for 2003 Toyota 4Runner
    For your 2003 Toyota 4Runner, the Hopkins Plug-In Simple Wiring Harness for Factory Tow Package - 7-Way Trailer Connector # HM11141855 is not the correct fit as it only fits 2010-2014 model years. Instead you will want the Hopkins Multi-Tow 7-Way Blade and 4-Way Flat Trailer Connector w/ Mounting Bracket - Toyota # HM43374 which is a confirmed fit if you have the factory 7-way. If you do not have the factory 7-way, then you will need the Upgraded Modulite Vehicle Wiring Harness Kit...
    view full answer...

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




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality custom fit vehicle wiring for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • 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:

Expert Research:
Michael H
Expert Research:
Jameson C
Installed by:
Jeff D
Updated by:
Laura H
Updated by:
Sarah W
Updated by:
Alexander C
Video by:
Alan C

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.