bing tracking image
  1. Custom Fit Vehicle Wiring
  2. Hopkins
  3. Custom Fit
  4. Trailer Hitch Wiring
  5. 4 Flat
  6. No Converter
Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Item # HM42635
lowest price pledge
Retail:$38.62
Our Price: $27.94
You Save: 28%
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: 0.45 lbs
Quantity: 
In Stock
HM42635 - Custom Fit Hopkins 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

Customer Photos

Need help with installation?
Locate installers near me
Quickly and easily install a 4-way trailer connector on your vehicle with this custom harness. T-connector plugs directly into existing wiring - no cutting or splicing required. 1-800-496-5010 to order Hopkins custom fit vehicle wiring part number HM42635 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 with 4-Pole Flat Trailer Connector. Custom Fit Vehicle Wiring reviews from real customers.
  • All Info
  • Reviews (63)
  • Q & A (0)
  • Photos
  • Why etrailer?

Hopkins Custom Fit Vehicle Wiring - HM42635

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

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


Features:

  • Provides a 4-way flat trailer connector at the back of your vehicle to power your trailer's signal lights
    • Compatible with 5-pole, 6-pole and 7-pole adapters (sold separately)
  • Connects quickly and easily - no cutting or splicing
    • Locate connection point behind driver's-side tail light
    • Plug in connector
  • Protective connection terminals resist corrosion
  • Comes with dust cap for 4-way flat connector, cable ties, and terminal grease packet for electrical connections
  • 90-Day limited warranty


Installation

This custom-fit T-connector plugs into your vehicle's wiring harness, which is located behind the driver's-side tail light. You will have to remove the tail light assembly to access this harness.


T-One Connection Location Points Behind Tail Lights

Once installation is complete, the 4-way flat connector will be stowed beneath your vehicle, near the trailer hitch. A mounting bracket (sold separately) is recommended to keep the connector secure.


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



42635 Plug-in Simple Hopkins T-Connector with 4-Pole Trailer Connector

Installation Details HM42635 Installation instructions

This Product Fits The Following Vehicles



California residents: click here



Customer Reviews

Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - HM42635

Average Customer Rating:  4.9 out of 5 stars   (63 Customer Reviews)

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

by:

Very simple plug connection. Just disconnect jeeps left tail light plug. Install this plug between factory plugs. Done. Routed wires along framerail in order to hide as best as possible.




by:

Knocking one star because it was a pain to get into the etrailer mount that I bought with this harness. See picture. Not sure if it was the mount or the harness being thicker. Wound up chewing the crap out of it as I pushed and struggled to get it through the hole. Not happy with it being all chewed up.

The connection to the Jeep tail light (driver side) was super easy and best install in that regard I’ve ever done.


Comments
No issues after a year, works great.
James - 02/08/2021


by:
2010 Jeep Wrangler Unlimited

im always shocked how fast i get my things from etrailer. got it in 2 days.. incredible. the parts are alst top of the line.


Comments
Still perfect
Edward L - 10/07/2021


by:

This company have been nothing but understanding and professional. I ordered my parts for my new RV and they came through without a hitch. I liked that I could track the package along the way. Keep up the good work y’all




by:

Well I haven't got home yet to put it in yet but it arrived a day Early which is fantastic. Thank you so mucb




by:
2014 Jeep Wrangler

Simple concept and design. Should come with a matched plug bracket.




by:
2012 Jeep Wrangler

The Hopkins wiring harness I purchased along with my hitch could not have been any easier to install. I’m totally satisfied with it and would recommend this item to anyone who,like me doesn’t like to be splicing into factory wiring on my vehicles. In my opinion cutting into wiring should be avoided whenever another option is available.




by:

Great transaction my new place to buy trailer supplies




by:

was easy to install and works fine as usual etrailer was great to work with

i also instilled the plug in wiring harness

DIY saved $200-400




by:

Worked perfectly as a 4 pin. I have been chasing a possible ground (loop?)issue when used as part of a 7 pin, and think that this could potentially (ha!) be related to the lack of a local ground at this location. This has nothing to do with the product... more with the vehicle wiring design. I've provided a local ground to the frame and will take the camper out next week to see if it repeats.




by:

This wiring harness is the best and easiest I've ever bought for a vehicle anybody can install this and it works first time




by:

Works great as designed




by:
2007 jeep Wrangler

Perfect fit on my 2007 jku wrangler.




by:
2007 Jeep Wrangler

Plug and play, how could it get any easier? Installed behind tail light in less than 10 minutes. Took another 15 to figure out a mount to make it secure. Hopkins made my life much easier with plug and play.


Comments
Works every time I plug in my trailer. I keep th pigtail hidden inside my trunk so it stays clean and dry.
Nick - 09/04/2019


by:
Jeep

This product was fabulous. It could not have been easier. I can't believe that it was this easy to get my jeep wired to pull my trailer with lights.




by:

I ordered these items and I no time at all they arrived at my front door! I was able to track the items, time, place, arrival and departures. As far as the quality of the equipment, extremely well made and top notch functionality. Some of the parts were heavy, but well packaged for safety. I highly recommend this company.




by:

Excellent! Easy to install and works perfectly. Hundreds of dollars saved instead of getting a new factory wire harness installed.




by:
2012 Jeep Wrangler Unlimited

Definitely happy that I was able to buy a plug in harness. Search lots of local stores but couldn't find any then Google showed me a link for the site. Shipping was quick, and pleased with the results.




by:

This was a plug and play. Very good quality. The wiring has heat tape around the wires to prevent cutting and heat from the exhaust. With only a screw driver it was installed in about 5 minutes. No splicing.




by:

Easy installation and great fit




by:

MY WIRING KIT WAS DELIVERED PROMPTLY, AND WAS THE PERFECT FIT FOR MY VEHICLE.
THANX Y-ALL


Comments
Very Happy with the product.Thank You
David W - 10/17/2017


by:

I tried a set of your submersible LEDs they were ruined in less than a year. I bought the other ones put them up out of the water level they were great.




by:

Quick delivery, just what I needed…works like it’s supposed to




by:
2012 Jeep Wrangler

Great wire harness. I’m an aircraft technician, I don’t get this kind of ease and quality in aviation lol. A person (man or woman) has plenty of time to drink a beer and still install the wire harness in under 30 minutes.




by:
2011 Jeep Wrangler Unlimited

Easiest harness install ever, no ground wire or anything to run, 2 screws and 2 connectors then done!



25
63
Show More Reviews

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



  • Wiring Harness for 2012 Jeep Wrangler Without Tow Package
    The Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # HM42635 is the correct wiring harness for your 2012 Jeep Wrangler that does not have the factory tow package. It will give you a 4-flat in order to power your trailer's lights. I've added a link to a video review of this part for you to take a look at.
    view full answer...
  • Will Hopkins Wiring Harness # HM42635 Fit 2010 Jeep Wrangler
    Yes, the Hopkins Plug-In Simple Vehicle Wiring Harness # HM42635 referenced in your question is confirmed to fit your 2010 Jeep Wrangler that does not have the factory tow package. This custom-fit harness will install by connecting directly to the built-in ports located behind the driver's side tail lights. This will provide you with a 4-Way connector at the rear of your Jeep to connect with and power a trailer's basic signal lights. I have attached the installation instructions that...
    view full answer...
  • Trailer Wiring Recommendation for 2015 Jeep Cherokee
    We have a custom fit trailer wiring harness by Hopkins that does fit your 2015 Jeep Cherokee. For that you would want the part # HM11142464. We have confirmed this as a fit with Hopkins so we know it will work well. If you have something totally different in mind send me the picture you mentioned.
    view full answer...
    Image 1 for
  • Recommended Hopkins Wiring Harness for 2012 Jeep Liberty
    I do have a solution for you, however the Hopkins Plug-In Simple Vehicle Wiring Harness # HM42635 referenced in your question is designed to work on certain model year Jeep Wranglers and will not fit your Jeep Liberty. For your 2012 Jeep Liberty, you will instead want the Hopkins # HM11142485. This custom harness is confirmed to fit your vehicle and will install by connecting to the built-in ports located behind the driver and passenger side tail lights. Once those connections are made,...
    view full answer...
  • Comparing the Hopkins Flat-Tow and Trailer Wiring Harness for a 2013 Jeep JLU
    The Hopkins Custom Tail Light Wiring Kit for Towed Vehicles part # HM56200 is designed to take an input signal from the motorhome and apply that signal to the vehicle's taillights. The towed vehicle does not have to be running for this signal to be active. The Hopkins Plug-In Simple Vehicle Wiring Harness part # HM42635 on the other hand is designed to take an input from the vehicle and apply that signal to the trailer's taillights. The tow vehicle does need to be running for these signals...
    view full answer...
  • Can 4-Pole Trailer Wiring Harness and Flat Towing Harness Be Used at Same Time on 2012 Jeep Wrangler
    According to the folks at Hopkins, you can indeed use the # HM42635 trailer wiring harness and their # HM56200 flat towing wiring harness at the same time. I've linked to the installation video for the flat towing harness and instruction sheets for both parts. I've also linked to an article that runs through all the products needed to safely flat tow your Wrangler.
    view full answer...
  • Troubleshooting Hopkins Tow Wiring on 2014 Jeep Wrangler Unlimited Cause Motorhome Light Malfunction
    The only 2 things I can think of as to why the Hopkins Custom Tail Light Wiring Kit # HM56200 on your 2014 Jeep Wrangler Unlimited might be causing this to happen is if there is some corrosion and/or debris in between the tees you made behind your tail lights, or if for some reason you need to swap the order in which the tees are connected for this wring kit and the Hopkins Trailer Wiring Kit # HM42635 you also have installed. We've found that 2 of these tee-type wiring kits can be used...
    view full answer...
  • Trailer Wiring Recommendation for 2010 Jeep Liberty Sport
    I have a trailer wiring harness that would work well on your 2010 Jeep Liberty, but the part # HM42635 is only a fit for Wranglers. Instead you would want the part # 118554 which is a confirmed fit. I attached an install video for this for you to check out as well.
    view full answer...
  • Installing 4-Way Trailer Connector in 1987 Jeep Wrangler
    The Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # HM42635 is only a fit for 2007 to 2014 model of Jeep Wrangler and Wrangler Unlimited. For your 1987 Wrangler, I recommend the Tekonsha 4-Pole Hardwire Kit with Circuit Tester # 18252. This will be an easy install with the circuit tester and quick splice connectors to give you a working 4-way trailer connection. Your 1987 Jeep Wrangler did not have the factory wiring connection points to utilize, but...
    view full answer...
  • Hopkins Trailer Wiring Harness for a 2003 Jeep Liberty
    We do have a Hopkins trailer wiring harness that fits the 2003 Jeep Liberty but the part you looked at, part # HM42635, fit Wranglers from 2007 to 2014. Instead you need part # 42475 for your Liberty
    view full answer...
  • Will Hopkins Item # HM42635 Work For 2004 Jeep Wrangler
    The Hopkins Plug-In Harness, Item # HM42635, is not a confirmed fit for your 2004 Jeep Wrangler. What does fit is the Tekonsha T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector, Item # 118409. The Tekonsha wiring harness is a quick and easy install that plugs directly into your existing wiring. It will provide you with a 4-way flat trailer connector for your Jeep. It is also compatible with 5-pole, 6-pole, and 7-pole adapters which are sold separately. I have attached...
    view full answer...
  • Fitment of Wiring Harness for 2021 Jeep Wrangler Unlimited
    For a 2021 Jeep, I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector, # 118786. The T-One connector plugs directly into existing wiring and the powered ModuLite reduces strain on your Jeep's wiring system. We have an installation video available, linked below, walking through the steps of installing this on a 2021 model year Jeep. The Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector, # HM42635 is a great product and I highly...
    view full answer...
  • Hopkins Trailer Wiring Harness for a 2013 2-Door Jeep Wrangler
    The Hopkins trailer wiring harness, part # HM42635, does fit your 2-door 2013 Jeep Wrangler as long as you don't have the factory tow package. If you do have the tow package instead use part # HM40975-11933.
    view full answer...
  • Recommended Trailer Wiring Harness for a 2017 Jeep Wrangler Willys Wheeler Limited Edition
    We do have trailer wiring to fit your 2017 2-door Jeep Wrangler Willys but the Hopkins, part # HM42635, you asked about is not a fit. It's for model years from 2007 to 2014. If your Jeep doesn't include the tow package I recommend the Tekonsha, part # 118416. It plugs in behind the driver's side tail light. If you do have the tow package instead use part # HM42190. See the picture I've attached. If you have this connector under the rear of your Jeep then you have the factory tow package.
    view full answer...
    Image 1 for
  • Recommended Trailer Wiring Harness for 2015 Honda Pilot EXL
    I do have a solution for you, however as you mentioned in your question, the Hopkins Plug-In Simple Vehicle Wiring Harness # HM42635 is designed to fit certain model year Jeep Wranglers. For your 2015 Honda Pilot EXL, I instead recommend the Tekonsha T-One Vehicle Wiring Harness # 118558. This custom harness will plug directly into factory ports behind the trim panel in the cargo area and under the vehicle on the driver side. This will provide you with a 4-Way connector that will connect...
    view full answer...
  • Comparing Trailer Wiring Harnesses For 2011 Jeep Wrangler Unlimited
    The # C55124 and # HM42635 trailer wiring harnesses we offer for your 2011 Jeep Wrangler Unlimited are installed the same way on your vehicle. Both provide you with the tail, turn, and brake light. The Curt harness has a 1-year warranty while the Hopkins wiring harness has a 90-day warranty. The harnesses plug into the vehicle wiring located behind the tail lights To install these harnesses you will need to remove the tail light assembly to get to the wiring. When working with electrical...
    view full answer...
  • Parts Needed to Install the Prodigy P2 # 90885 on a 2014 Jeep Wrangler w/o the Tow Package
    If you don't have the tow package on your 2014 Jeep Wrangler then the Hopkins part # HM42635 is a good start but that is not all you will need for your Prodigy P2 # 90885 to properly work in your Jeep. The Hopkins kit that you referenced will give you a 4-Way connector but you need a 7-Way connector. For that you need the Universal Wiring Kit # ETBC7. This includes everything needed to have a fully functional 7-Way on your Jeep. This will also allow you to use your P2 for towing your trailer. I...
    view full answer...
  • Trailer Hitch and Wiring for a 2013 Jeep Wrangler Unlimited
    I recommend going with the Draw-Tite Max-Frame Trailer Hitch Receiver # DT78MR for a trailer hitch on your 2013 Jeep Wrangler Unlimited. This trailer hitch is a Class III hitch with a 2" receiver like what you are needing. It installs on a standard rear bumper and has a Gross Towing Weight (GTW) of 4,500 lbs and a Tongue Weight (TW) of 675 lbs. Be sure to check your owner's manual to make sure you can safely reach those weight capacities. For wiring I recommend the Hopkins part # HM42635...
    view full answer...
  • Will Prodigy P3 Brake Controller Fit 2009 Jeep Wrangler JK Without Towing Package
    Yes, the Tekonsha Prodigy P3 Trailer Brake Controller # 90195 will absolutely fit your 2009 Jeep Wranlger JK without a factory connector (towing package). To install it you will need to start with a 4-way, if you do not already have one, the Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # HM42635. You will then need the Universal Installation Kit for Trailer Brake Controller # ETBC7, which will give you a 7-way connector, circuit breakers and the rest...
    view full answer...
  • Trailer Lights Wiring Harness 2014 Jeep Wrangler Unlimited with 5 Poles
    My advise is based on the assumption that your trailer with a 5-wire connector is a boat trailer and the extra wire is blue and locks out the trailer brakes when you are in reverse. The easiest way to determine if your 2014 Jeep Wrangler Unlimited has factory tow set up is to have the dealership run the VIN for you and let you know how it was equipped. The tow package would have at least included the tow hitch and tow wiring. It seems unlikely that someone took the hitch off of your...
    view full answer...
  • Adding a 7-Way Trailer Connector and Brake Controller to a 2008 Jeep Commander
    We can get you set up with a 7-Way trailer connector and a brake controller for your 2008 Jeep Commander, no problem. First, you will need to install # 118408 which will provide the light functions to the 7-Way. Once that is installed you can then install # ETBC7. This will add the 7-Way, retain a 4-Way connector as well, and include the necessary components to hardwire in a brake controller. For a controller I recommend the P2 # 90885 because it is easy to set up and use and it is reliable....
    view full answer...
  • Will the Hopkins # HM42635 Fit a 1995 Jeep Cherokee
    We do have an option for you to add a 4-Way flat wiring connector to your 1995 Jeep Cherokee, but the Hopkins # HM42635 that you referenced is not confirmed to fit. What you will want to use instead is the Tekonsha # 119178KIT which is a hardwire installation that uses quick-splices to make it easier. Installation instructions have been attached for you to reference. If you will be towing with your Cherokee but do not already have a trailer hitch then I recommend part # 75054 which I...
    view full answer...
  • Will Hopkins Plug-In Trailer Wiring Harness Fit a 2019 Jeep Wrangler
    The Hopkins Plug-In Simple Vehicle Wiring Harness # HM42635 that you referenced is a fit for 2007 - 2014 Jeep Wranglers so for your 2019 Wrangler you will want the Tekonsha T-One # 118786 instead. Hopkins currently doesn't have a wiring option for you (as of May 2019) and we have found the Tekonsha wiring to be the most reliable on the market. The T-One has the same type of plug-in connectors as the Hopkins that you referenced but it also has a hot lead that you route up to your battery...
    view full answer...
  • Recommended Wiring Connector for 5-Way Boat Trailer Connection with 2009 Jeep Wrangler Unlimited
    We do not carry a 5-pole wiring harness that is vehicle specific. For your 2009 Jeep Wrangler Unlimited, you can install the 4-way # HM42635 and then splice in the vehicle side 5-way flat # HM47900 using butt connectors like # DW05744-5 to give you the 5 way. This will give you the connection without the adapter # 47515 needed each time as a 5-way will still work with a 4-way connection without issue and be a better connection for your boat trailer's 5-way. Your other option is to use...
    view full answer...


< Previous
12



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:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Cole B
Installed by:
Cole B
Employee Chris R
Video Edited:
Chris R
Employee Alexander C
Written by:
Alexander 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.


Product Experts Available Now!
Call 1-800-496-5010