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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 # HM11143910
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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 HM11143910 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.
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Hopkins Custom Fit Vehicle Wiring - HM11143910

  • 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.


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
  • 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, 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.



11143910 Plug-in Simple Hopkins Multi-Tow T-Connector with 4-Pole and 7-Way Trailer Connector

Installation Details HM11143910 Installation instructionsAlternate Instructions HM11143910 Installation instructions

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 - HM11143910

Average Customer Rating:  3.6 out of 5 stars   (19 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.

- HM11143910
by:
2013 Lexus LX 570

2013 LX570, plug into DRIVER'S side, the instructions say this, as do plenty of posts on IH8MUD, also drop your spare tire when you do this to enable more room. On my SUV there are the appropriate 2 mating connectors on the passenger side connected to a bracket with dummy caps on them. I plugged this into them just to try, and the pinouts are not correct. I did not try to check which wire was which, only that I did not have turn/brake/trailer brakes. If you follow this wire harness to the driver's side you will see 2 identical connectors that are plugged into the harness, you need to unplug these and plug this Hopkins HM11143910 into it. What is a bit frustrating, but not a deal breaker, is that this adapter is too short to enable the routing all the way to the passenger side of the vehicle so you can mount the bracket to the factory mounting point, there is a bracket with 2 M8X1.25 holes about 12-18" away from the receiver. I have not yet figured out a permanent mounting spot (as of now it is zip tied away from the muffler), but whatever I go with it will be ideal to get a 7 way and/or 4 way extension harness as the wiring is fairly far from the receiver and may cause an issue depending on the length of your trailer wiring.



- HM11143910
by:
2013 Lexus LX 570

Extremely disappointed in the quality control. Well built product but the pin-outs were completely wrong. I had been using the 4pin output up until now which was good, and the first time I used the 7-pin, it was completely mis-wired. There was no power to the trailer and it blew a fuse on my vehicle. Bought a tester and only the right turn signal was correct. Was in the field and had to resort to cutting the harness to temporarily remap the socket. A search of the web shows a few more frustrated users likely experiencing the same issue.


Comments
PK, thank you for your review. We reached out to the engineers at hopkins and they let us know there are two sets of plugs on the the Lexus LX 570. The Lexus has two connectors on the drivers side and two connectors on the passenger side. The harness will plug into both sets of connectors but the connectors on the passenger side are not pinned for this part. This part HM11143910 plugs into the plugs on the drivers side.
-- Etrailer Expert Heather A - 05/17/2018


- HM11143910
by:
2008 Toyota Land Cruiser

This product works on LC200 (200 series Toyota Land Cruiser) in the same mounting location as listed for the LX570. It MUST be placed on the driver side, not on the passenger side hook ups. I recommend moving the spare tire out of the way prior to install, it just gives a bit more room to work. Product installed quickly and had all the needed components. it did not have a "self tapping" screw/bolt, which would have helped with the mounting, but it only needed one which I had laying around. I liked that the mounting bracket had different possible configurations, as I mounted mine so that the 7 pin cap opened sideways, which is easier to deal with.


Comments
So far so good, Ive pulled trailers with both 4 and 7 pin connectors and they work. No signs of wear or corrosion, mounting location still works.
Andrew D - 04/01/2020



- HM11143910
by:
2008 Lexus LX 570

At first I thought the wiring was incorrect as stated by other reviews, but when I reached out to Hopkins they provided the attached diagram and pointed out that it is required to be connected on the plugs found on the drivers side (highlighted in yellow), not the open plugs on the passenger side. After I made this change everything worked


Comments
Great
Ryan H - 05/13/2019



- HM11143910
by:
Lexus LX 570

Did not fit my LX570 as stated. Well made but miss wired. Plugged right into my cars wiring harness and nothing worked. Turned out I had to cut and splice each wire in the pig-tail to get all the lights to work. I still don't have trailer brakes but I'm sure that is wired backwards also. I got frustrated and gave up, almost a year later I got around to trouble shooting it (I really needed it for a trip with my car trailer and my truck was down) Works fine now that it's re-wired, I like the dual plugs, both flat and round. Very handy. I guess I would try again with a different make/model vehicle when I have the need.


Comments
Looft, thank you for your review. We reached out to the engineers at Hopkins and they let us know there are two sets of plugs on the the Lexus LX 570. Two connectors on the drivers side and two connectors on the passenger side. This part # HM11143910 plugs into the plugs on the drivers side.
-- Etrailer Expert Heather A - 05/17/2018


- HM11143910
by:
2013 Lexus LX 570

Defective plug. Checked > juice @ car plugs...juice from connectors to plug (wires good)...no juice at he master plug, either one. U-Haul had to install their own plug!!!


Comments
According to Hopkins, this vehicle has a set of plugs on both the drivers and passenger side. The trailer connector will NOT work if plugged into the passenger side, use the plugs on the drivers side only and it should work fine for you.
-- Etrailer Expert Mike L - 04/23/2019


- HM11143910
by:
2013 Lexus LX 570

This item did not work properly. It did fit the factory connections. But when I used the four pin connection for trailer lights it did not work properly. I had to spice up the wires on my trailer four pin to make is partially work and complete my trip. I have not used the 2013 Lexus LX 570 to tow anymore. Perhaps it was just a faulty product and I need to order another one an retry.


Comments
Steve, thank you for your review. We reached out to the engineers at hopkins and they let us know there are two sets of plugs on the the Lexus LX 570 one set on the drivers side and one set on the passenger side. The harness will plug into both sets of connectors but the connectors on the passenger side are not pinned for this part so it will not work. This part # HM11143910 plugs into the connectors on the drivers side.
-- Etrailer Expert Heather A - 05/17/2018


- HM11143910
by: 04/25/2021
2017 Lexus LX 570

Does not work the connections fit but it blows fuse as soon as you hook the trailer to it.


Comments
Thank you for your review. I recommend to make sure you have the two connections from the wiring harness fully seated with the two connectors from the drivers side of the Lexus not the passenger side. If you are still having issues then you may want to check the trailer wiring for any shorts or frayed wiring. It is also a good idea to make sure you have a secure ground to a clean bare metal surface of the trailer.
-- Etrailer Expert Heather A - 05/13/2021


- HM11143910
by:
2013 Lexus LX 570

I have tried it but it didn’t work and i have fix it on driver side socket


Comments
As you have realized, the 2013 LX570 has connectors on both the drivers and passenger side. Make sure that the connector is plugged all the way into the connectors on the drivers side until its fully seated. If the trailer connector is already fully seated into the connectors on the drivers side, you might have a missing or blown fuse. The fuses that protect the vehicles tow package are located in the fuse box under the hood, in position # 10,16,17,23 and 44. Please check those fuses and let us know what you find.
-- Etrailer Expert Mike L - 12/27/2018


- HM11143910
by:
2013 Lexus LX 570

Not sure who screwed up wiring on the passenger side, the Lexus or Hopkins engineers. Why doesn't it just work on the passenger side? Hence, 4 stars. I had to ask a mechanic to hook it up on the driver side that required placing the harness closer to the driver side.



- HM11143910
by:
2011 Toyota Tacoma

I just received the shipment and everything looks good. I haven't installed anything yet but I expect no issues. Shipping, while perhaps not as fast as say that big box website, is consistently fast enough with excellent communications from etrailer and predictable tracking info. This is our second order from etrailer and almost certainly will not be our last. Very good people to work with.



- HM11143910
by:

The electrical wiring harness was an easy install. I just needed to unplug the factory wiring and plug the harness in.



- HM11143910
by:

I took some pics this morning of the product laid out on my kitchen counter. I remembered your email and then when I opened the packaging up, I said this looks like a well-made product; thus, I will be happy to take some pictures of it installed. I was impressed by the detail of receiver cover in that even the 4-prong receptacle cover is hinged, which is something unusual for a rubber lanyard to a plug cover. I only hope that the hardware is stainless steel. If not, I will be switching it out for stainless.



- HM11143910
by:
1997 Ford F-250 and F-350 Heavy Duty

Excellent customer service. Product delivered as promised. I will be a future customer as well



- HM11143910
by:

Great service- highly recommend



- HM11143910
by:



- HM11143910
by:
2013 Lexus LX 570

Quick and easy to find what I needed and to get it shipped to my door. Great job.



- HM11143910
by:

Great experience, the product arrived on time. I would highly recommend using this company.



- HM11143910
by:


19
19

Ask the Experts about this Hopkins Custom Fit Vehicle Wiring



  • Replacement 7-Way Recommendation for 2012 Toyota Tacoma
    The harness you referenced is for a Lexus vehicle and would not be correct for your 2012 Toyota Tacoma. For a replacement that does fit your vehicle you would want the part # 74682. As long as the harness is in tact this will work fine. It comes with a new bracket as well.
    view full answer...
    Image 1 for
  • Will the Prodigy RF Brake Controller Fit a 2011 Lexus LX 570
    Yes, you can use the Prodigy RF brake controller # TK94FR on your 2011 Lexus LX 570. The Prodigy RF only needs a functioning 7-Way trailer connector (specifically the 12 volt circuit and brake signal circuits) to work with a vehicle. It looks like your vehicle comes with a factory 7-Way connector so you will be good to go! Should you ever need to replace the 7-Way I recommend # HM11143910 because it will just plug right into the vehicle wiring where the original 7-Way plugged in.
    view full answer...
  • Running and Mounting a Trailer Wiring Harness to the Outside of a 2004 Honda Element
    There may be a way to have an exterior mounted trailer wiring harness for your 2004 Honda Element but # HM11143910 is not a fit. What you can do is look for a grommet in the rear cargo area that you can route the wiring through. You will need to pull up the flooring to get to the bare metal of the cargo area. If there is no grommet you would have to drill a hole in the floor, careful of what is on the opposite side of where you are drilling, route the wiring through, then seal up the hole...
    view full answer...
  • Wiring Needed for a 4-Way and 7-Way on a 2015 Toyota Tacoma
    It sounds like you don't have the factory 7-Way on your 2015 Toyota Tacoma. We do have some parts that you can install that will give you a 4-Way and 7-Way combination on your Tacoma. To start off I recommend going with the Tekonsha T-One # 118496 which plugs in behind your tail light housing just like the Hopkins # HM11143910 that you referenced installs. This will give you a 4-Way for basic trailer lighting functions. If you are needing a 7-Way as well then you will need to install...
    view full answer...
  • Newly Installed Trailer Connector Not Working on a 2013 Lexus LX 570
    Hopkins trailer connector # HM11143910 is designed as a replacement for 2013 Lexus LX 570 models that came with a factory tow package and 7-Way connector. It sounds like yours did not come with the factory tow package or it is not connected in the right place and that would be why it isn't working. If you have it plugged into the connectors on the passenger's side of the vehicle then try plugging the harness into the same connectors on the driver's side. Or it could be that the dealer has...
    view full answer...
  • Adding 7-Way Connector to 2018 Subaru Forester with Existing 4-Way
    You can absolutely install a 7-Way connector on your 2018 Subaru Forester that is already equipped with a 4-Way. If you will only need to power the basic signal lights on the trailer that is equipped with a 7-Way then you can use the Hopkins Adapter # 37185. This will plug right into the existing 4-Way on your Forester to provide both a 7-Way and 4-Way on the other end. After attaching the white ground wire to a bare metal surface the additional wires can simply be tied off as they won't...
    view full answer...
  • Recommended Wiring Harness for 2011 Lexus LX570
    We have exactly what you're looking for. For a 4 way trailer connector you can use the Curt # C55245 or if you need both a 4 way and 7 way, you can use the Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors # HM11143910. Both of these harnesses will plug into the vehicle's existing towing package harness and provide you with the plugs you need to power your trailer's lights. If you'll be towing a trailer with brakes when using the 7 way...
    view full answer...
  • Brake Controller Installation for 2020 Subaru Forester
    The 2020 Subaru Forester isn't pre-wired for a brake controller, so you'll need to do a hardwire install. For starters, you'll need a 4-pole trailer wiring harness, part # 118467 which will gain electrically protected access to the taillight circuits. Then, you'll need out brake controller install kit, part # ETBC7. The install kit includes everything needed to complete the install of the Tekonsha Prodigy P2, which we offer as part # 90885, including all the necessary wire, hardware,...
    view full answer...
  • Recommended Trailer Wiring for 2009 Toyota Highlander Hybrid
    The Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package - 7-Way and 4-Flat Connectors # HM11143910 is not a fit for your 2009 Toyota Highlander Hybrid. It is a custom fit for 2008 to 2013 Lexus LX 570 models only. For your Highlander, there are only 4 way options available with the tow package. You can use the Hopkins Plug-In Simple Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector # HM11141825 which is a confirmed fit. If you do not have the...
    view full answer...
  • Installing a 7-Way Trailer Connector on a 2005 Toyota Tacoma
    I'm not sure why but I can tell you that the part you're looking at, Hopkins Plug-In Simple Vehicle Wiring Harness # HM11143910, is a fit for the Lexus 570 but not your 2005 Toyota Tacoma. To install a 7-way trailer connector on your truck you need to first start by adding a 4-way if you don't already have one. I recommend using the Tekonsha part # 118496. It plugs in either behind the tail lights or along the truck's frame rail on both sides. Once the 4-way is installed, or if you...
    view full answer...
    Image 1 for
  • How To Mount 7-Way Trailer Connector On 2017 Lexus LX 570
    In order to mount the Hopkins Plug-In Simple Vehicle Wiring Harness for Factory Tow Package part # HM11143910 on a 2017 Lexus LX 570 you'll need the Mounting Bracket and Installation Hardware part # PK12711U. If you can' find anywhere to mount this bracket you can purchase the Curt No-Drill Bracket part # C57202 and secure it to the hitch. It may be necessary to bend the bracket as needed.
    view full answer...




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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Jeff D
Installed by:
Jeff D
Employee Laura H
Written by:
Laura H
Employee Alan C
Video by:
Alan C
Employee Alexander C
Updated by:
Alexander C
Employee Sabrina W
Updated by:
Sabrina W

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