FITS 2003 Jeep Liberty
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 # 42475

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Custom Fit Vehicle Wiring
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2003 Jeep Liberty

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Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector Custom Fit 42475
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  • Custom Fit
  • Trailer Hitch Wiring
  • Hopkins
  • 4 Flat
  • Converter
Hopkins custom fit vehicle wiring for your 2003 Jeep Liberty are available from etrailer.com. Installation instructions and reviews for your Jeep custom fit vehicle wiring. Expert service, and cheapest custom fit vehicle wiring price guarantee. etrailer.com carries a complete line of Hopkins products. Order your Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part number 42475 online at etrailer.com or call 800-298-8924 for expert service.


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  • Reviews (55)
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2003 Jeep Liberty - Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

Quickly and easily install a 4-way trailer connector on your Jeep Liberty 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 Jeep Liberty 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 points in rear cargo area
    • Plug in connector
  • Includes a tail light converter to ensure that your Jeep Liberty's wiring matches that of your trailer
  • Protective connection terminals resist corrosion
  • Comes with dust cap for 4-way flat connector, cable ties, and terminal grease packet for electrical connections


Specs:

  • Maximum amperage:
    • Turn lights: 2 amps per circuit
  • 90-Day limited warranty


Installation

This custom-fit T-connector plugs into your Jeep Liberty's wiring harness, which is located in your rear cargo area on the driver's side. You will have to remove the cargo strap and some interior paneling to access this harness.


Once installation is complete, the 4-way flat connector will be stowed beneath your Jeep Liberty, 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.


Tail Light Converter

A tail light converter is built into this T-connector. Because most trailers run on a two-wire system - wherein the brake and turn signals are carried on one wire - the separate brake and turn signals from your Jeep Liberty's three-wire system need to be combined so they are compatible with the wiring system of the trailer. This converter combines the brake and turn signal functions of your automobile so that they run on one wire to properly activate your trailer's tail lights. Note: This will not affect how the tail lights on your Jeep Liberty operate.



42475 Plug-in Simple Hopkins T-Connector with 4-Pole Trailer Connector



42475 Installation InstructionsInstallation Details 42475 Installation instructions

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


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




Video Transcript for Hopkins Custom Fit Vehicle Wiring - Trailer Hitch Wiring - 42475 Review

Today we're going to take a look at the Hopkins plug-in simple vehicle wiring harness with the four-way trailer connector. Now, this part is a custom fit part. It is designed to fit the 2002 to 2007 Jeep Liberty vehicles, and on any custom fit part I always like to recommend to go to our website, use our fit guide. Put in your year and model vehicle and it'll show you if this will work for your application. Now, this plug-in simple wiring connector will provide a no hassle, quick and easy way to wire your vehicle. It provides this four-way flat trailer connector at the back of your vehicle to power your trailer's signal lights.

All this connects very quickly and easily. There's no cutting or splicing of wires. Basically you just locate your connection points in the rear of the vehicle, plug in this T connector, attach your converter to a nice flat surface, and then run the wire out the back to connect to your trailer. Now, it does include this taillight converter, and this is to ensure that your vehicle's wiring will match that of your trailer. If you notice on the four-way, it does come with this nice dust cap, so when you're not plugged into your trailer, you can just put this on over the four-way, just like that, and it'll protect those terminals from any damage or from the elements themselves. Now, it does also come with a grounding screw, because on installation you do need to ground the white wire, and it comes with some terminal grease that you want to put on all your electrical connections to prevent any corrosion. Basically, on the installation on this on the Jeep Liberties, the OEM plug that this plugs into is usually located behind the paneling in the back of the vehicle, and it's on the passenger side.

Basically you'll just unplug it, plug this into its place, one on one end, one on the other, take your white wire with the eyelet on it, connect this to a nice clean ground. If you can't find one, you can drill a hole and make your own clean ground. Then, what you want to do is take a piece of double-faced tape or a wire tire, and attach this down to a nice, flat surface so it doesn't bounce around, and then run this out the back. Basically there's a grommet that's located in the floor of the Jeep Liberty, and this is to allow for you to run this four-way flat connector out down by the trailer hitch. Once you do that, we would recommend to get a mounting bracket so you can mount his fully to the vehicle. We do sell those on our website, and they are listed on this product page as a related product.

Then you're all ready to plug this into the trailer, just apply the lights on your trailer. That should do it for the review of the Hopkins plug-in simple vehicle wiring harness with the four-way trailer connector.


Customer Reviews

Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector - 42475

Average Customer Rating:  4.8 out of 5 stars   (55 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.

- 42475
by:
2006 Jeep Liberty

After ordering this my shipping was upgraded and my part shipped out the next day. My part was securely packed within the shipping box with all parts included. Installation time on this was around 10 minutes, and made easier by the videos. I would recommend these guys. 214899



- 42475
by:
2003 Jeep Liberty

The instructiosn did not match my car, there was no way to get to the plug from the inside, so I had to take off the whole inside panel off. The yellow slide switch on the plug did not release the plug lock, I figured out with a flat head screw driver stuck in-between releases the lock. Them to top it off, after everything was assembled, the trailer lights did not work!!!! I hope your customer service is up for a challenge. 191624



- 42475
by:
2004 Jeep Liberty

Simple Installation, No modifications needed. Note: On the Jeep Liberty the floor plug for the wire run is above the tailpipe. Secure the wiring far away from the tailpipe. 527200



- 42475
by:
2006 Jeep Liberty

Purchased for 2006 Jeep Liberty. Installation was a snap. I pull my utility trailer alot and this unit has been trouble free. In the old days I would cut into my vehicle wire harness to add a trailer connection. Not anymore! This Hopkins adaptor is deffinetly the way to go. 365123


Comments

The hopkins wiring kit was installed on our jeep liberty and has performed flawlessly since. I tow both a boat trailer and often pull a utility trailer, so it has been used quite a bit. And, it says alot about your company that you take time a year later to follow up with your customers!

John s - 04/10/2018

37154

- 42475
by:
Jeep Liberty

The service by E-Trailer staff is unsurpassed. I had several questions prior to purchase and they were all answered quickly and succinctly. Also my Jeep Liberty didn't "fit the description" of how to access the connection behind the passenger side rear panel; but they didn't pass it off, still tried to assist even though my vehicle was different (in case others run into this: my Liberty had no cargo bracket to remove; just take off the weatherstripping, and pry the panel off towards the center of cargo area). Job was very easy and had my wiring done in about 40 minutes. Longest part of job was being sure I kept wire away from exhaust, but it was no problem. I will definitely recommend and use E-Trailer again, Thanks 24623



- 42475
by:

This product works. We replaced the exact same brand/harness that we had previously installed years ago. It had quit working. We assume it was the wires at the plug that had broken as they are not protected. I would recommend buying the optional bracket to permanently install this on the hitch or at minimum use some electric tape and maybe plastic to protect the wires better. But still a good harness. I used some dielectric grease on all connection points. It comes with a small packet. U may want to buy some extra. 366877



- 42475
by:
2003 Jeep Liberty

Ordered the required wiring harness with converter for use with trailer hook up. It arrived when it was supposed to and installation was a snap. instruction were included which made the job even simpler. When I took the trailer for the required state inspection it passed with flying colors. So once again great job from 1AAuto on the timely shipping and the correct part. Thanks folks 198929



- 42475
by:

Works great easy to install 565408



- 42475
by:

Great quality. Easy to install plugs into factory plugs behind the plastic panel in the cargo area and through the floor through the factory grommet. Took me about an hour. No problems. 603193



- 42475
by:

Nice product very clean design and clear instructions. 599232



- 42475
by:
2007 Jeep Liberty

Excellent products, high quality 591873



- 42475
by:
2002 Jeep Liberty

So far so good. Directions we absolutely accurate. Plugged in and worked perfectly. 550545



- 42475
by:
2007 Jeep Liberty

Easy to hook up and use. Highly recommend this product and Company. 529413



- 42475
by:
2007 Jeep Liberty

Easy to install and no problems after i nstallation 511947



- 42475
by:
2007 Jeep Liberty

Good product, easy installation. 511376



- 42475
by:
2002 Jeep Liberty

This wire harness was an easy install and it was a plug n play , no splicing so made it easy. 495125



- 42475
by:
2003 Jeep Liberty

Very Happy For The Order Thank You. 484054



- 42475
by:

Very simple plug and play. Worked great and no problems with the trailer lights. 457046



- 42475
by:

Product performs perfectly. Would buy again. Fits Great!!! 456720



- 42475
by:
2007 Jeep Liberty

The wiring harness works fine and was easy to install. Good product. Thanks. Bill 439407



- 42475
by:
2007 Jeep Liberty

Product seems to work so far. Easy Install if you haven't had an idiot mastermind make and and onto a squirrel nest of wire. Wow what a mess I hope nobody seems has this previous owner problem should have been 10 minute job. 403368



- 42475
by:
2003 Jeep Liberty

Fit perfectly, easy to install, instructions were great 395247



- 42475
by:
2004 Jeep Liberty

Great product, easy to install. 377798



- 42475
by:
2005 Jeep Liberty

Great product, no tools required. Great customer service . 376861



- 42475
by:
2005 Jeep Liberty

Great product and easy to install. The instructions were accurate and well written. 365903



- 42475
by:

Just what I needed, simple to install and route. 361898



- 42475
by:
2007 Honda CR-V

The plug in wiring connection for my 2007 CR-V was easy to install and is working great. No issues at all. 341369



- 42475
by:

Is a quality product made to OEM spec's. Was easy to install, pricing was and delivery were great! I'll order again as the need arises. Thanks 319030


Comments

Product functioning as stated when purchased. Looking for years of continued great service, thanks again.

Chuck K - 12/11/2017

31724

- 42475
by:
2002 Jeep Liberty

Very easy install, pleased with my purc hase! 318004



- 42475
by:
2002 Jeep Liberty

The part worked perfect, the installation was done in 15 minutes. I like the fact that I can keep the plug connector inside the Jeep, in Michigan the road salt tears up trailer connections. 313994



- 42475
by:
2004 Jeep Liberty

Great service and prompt delivery. Part was exactly what I needed. 275913



- 42475
by:

Excellent product. Installed quickly and has worked very well. I would recommend this to a friend. 251145



- 42475
by:
2003 Jeep Liberty

Fast shipping, easy installation and it performs it's intended use couldn't ask for much more. 248206



- 42475
by:
2006 Jeep Liberty

Worked great on my 2006 Jeep Liberty. 236815


Comments

Still working great in my 2006 Jeep Liberty after a year. Great product.

Charlie B - 02/09/2017

22428

- 42475
by:
2005 Jeep Liberty

Works great, fairly priced, quickly shipped. Thanks! 218152



- 42475
by:
2003 Jeep Liberty

Great communication from the seller. Good, quality product as well. Nice doing business with them. 199251



- 42475
by:
2004 Jeep Liberty

Wow, not used to something being this easy! Pulling the plastic off the wheel well is the only pain and make sure you have a drill for the ground wire, left mine somewhere else. So I just bolted it to a hole in the wheel well instead with a spare bolt and lock nut. 173197



- 42475
by:
2004 Jeep Liberty

Item arrived on time, installed exactly according to the inclosed directions, works perfectly. And, best of all, the price was right. 170450



- 42475
by:

Just like the information states,simple installation. 151200



- 42475
by:
2002 Jeep Liberty

Received harness quickly and was easy to wire. 140017



- 42475
by:

The directions were perfect! Couldn't have been any easier to install 125922



- 42475
by:
2003 Jeep Liberty

The receiver and harness for my 2003 jeep liberty fit great and no issues. Had it done in 30mins. 120090



- 42475
by:
2006 Jeep Liberty

The Hopkins Harness was recommended by an auto/truck service manager as well as Jeep owner forums. Your price was nice and delivery time was faster than I expected! 100676



- 42475
by:

Plug in and play, very easy to use. After plastic pulled back just plug it in and you are done. Spent more time looking for a drill to connect ground than the entire install. Robust product. 75569



- 42475
by:
2003 Jeep Liberty

Installed in minutes on my 2003 Jeep Liberty Renegade. Highly recommended. etrailer provided outstanding service. 67007



- 42475
by:
2006 Jeep Liberty

Just like thay say. . . .Just plug it line and its good to go. Works great took only 10 min. 55661



- 42475
by:
2004 Jeep Liberty

High quality and great fit with the mounting holes provided on the vehicle. 54990



- 42475
by:
2004 Jeep Liberty

High quality and great fit with the mounting holes provided on the vehicle. 54989



- 42475
by:
2007 Jeep Liberty

This is an excellent product that is every bit as good as the Jeep OEM part. Installation was a breeze and the directions were spot-on. I am glad I did some research before purchasing anything. This product is everything I expected and then some. Yes, it is THAT good. 53249



- 42475
by:
2004 Jeep Liberty

Product arrived very fast and was extremely easy to install 33784


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Ask the Experts about this Hopkins Custom Fit Vehicle Wiring
Do you have a question about this Custom Fit Vehicle Wiring?


  • How to Determine if a 2004 Jeep Liberty has a Tow Package to Pick Out Trailer Wiring
  • The most efficient way to determine if your vehicle has the tow package is to take your VIN number to a Jeep dealer and have them run it. They will be able to tell whether or not you have the tow package with that information. Or you could check the wiring in your vehicle to see if the correct connectors are present on your vehicle. Check out the installation instructions I attached that will show you how to access the area. If you have the tow package, or if you find the harness...
    view full answer...

  • Wiring Harness Recommendation for a 2004 Jeep Liberty Without a Tow Package
  • I verified with my contact at Hopkins that the Hopkins Plug-in Wiring Harness, # 42475, will work on your 2004 Jeep Liberty if it did not come with a tow package. He also stated that the factory connection is typically on the passenger side, but it may be possible that the manufacturer routed the connection to the driver side. I would recommend checking the passenger side for a connector before attempting to connect it to the connector on the driver side. One thing that you will...
    view full answer...

  • Trailer Wiring Harness Options for a 2002 Jeep Liberty
  • Oddly enough a tow package will not necessarily include a trailer hitch. Evey vehicle manufacturer has a different set of components that make up a towing package. The only definitive way to determine if your 2002 Jeep Liberty has a tow package is to have a dealer run the VIN number of the vehicle to tell you what options it has. f you find that your Liberty did not come with the tow package, then it will not be set up from the factory to accept the # 42475 harness. You will instead...
    view full answer...

  • Difference Between Curt and Hopkins Trailer Wiring for a 2005 Jeep Liberty
  • The biggest difference will be price. The two harnesses are basically the same harness made by two different companies. The Curt part # C55382 would be what I would go with over the Hopkins # 42475 because the price is better and because we seem to have better luck with Curt wiring than Hopkins. I attached an install video for this harness for you to check out as well.
    view full answer...

  • Wiring 4-Way And 7-Way Connector On 2004 Jeep Liberty To Tow Popup Camper
  • If you are wanting a 7-way connector at the back of your 2004 Jeep Liberty and you have brakes on your pop-up trailer, and you currently have no connector installed, part # C56175, and part # ETBC7, will do just that. I have attached a helpful article that explains how to install the # ETBC7 you can check out. You will also need a brake controller. I recommend the Tekonsha Prodigy P2 Brake Controller, part # 90885. This is our more popular brake controller because it is easy to install...
    view full answer...

  • Trailer Wiring Harness Recommendation for a 2005 Jeep Liberty
  • If your 2005 Jeep Liberty has a factory tow package, you could use either the Hopkins harness, # 42475, or the Tow Ready harness, # 118381. The vehicles with a tow package have a factory connector made to add a wiring harness. Both products will perform equally as well. But if your Liberty did not come with a tow package, you will need to use Tow Ready Custom Fit Vehicle Wiring, # 118524. This is a circuit protected powered converter which is required to protect the sensitive electrical...
    view full answer...

  • Is A Separate Power Wire Needed When Installing Hopkins Wiring Harness # 42475 On 2003 Jeep Liberty
  • The Hopkins Plug in Simple Vehicle Wiring Harness, part # 42475, is the wiring harness you will need for your 2003 Jeep Liberty. You are correct that the # 42475 wiring harness no longer requires a separate lead to the vehicles battery. I spoke with my contact at Hopkins and he said that the Jeep Liberty never really needed the separate power wire originally, but they decided to be on the safe side and to recommend it. They did further testing and found out that the Jeeps wiring harness...
    view full answer...

  • Connection Point For a Hopkins Trailer Wiring Harness on a 2006 Jeep Liberty without Tow Package
  • For a 2006 Jeep Liberty, the OEM plug is located behind the paneling in the back of the vehicle on the passenger side. There is a grommet located in the floor to allow for the 4-flat connector to be run down by the trailer hitch. I have included a link to the installation instructions for you.
    view full answer...

  • How to Select Correct Wiring Harness for 2006 Jeep Liberty
  • A local Jeep dealership can run your Liberty's VIN through their computer to tell you if it was equipped with a factory tow package, but you can also just check under the rear bumper to see if there is a wiring connector that looks similar to the one shown in the linked photo. This image shows male/female connectors included with 4-pole harness part # 42475. The 7-way harness # HM42190 also uses a rectangular OEM connector. Both of these harnesses are for tow-package-equipped vehicles. If...
    view full answer...

  • Wiring Harness Recommendation For 2006 Jeep Liberty Without Factory Tow Harness
  • The Hopkins Plug in Adapter, part # 42475, is not designed to work with your 2006 Jeep Liberty, but we do have a solution that will work for you. For your Liberty, you will need to check to see if your vehicle has the necessary connector and if it is active. You would need to locate the connector at the rear of the vehicle that should be near the drivers side frame rail by the spare tire. You can use a circuit tester like part # 3808 to test the pins of the connector for the various...
    view full answer...

  • Recommended Trailer Hitch for a 2004 Jeep Liberty
  • All of the hitches we currently offer for a Jeep Liberty will fit years 2002-2007 and no other vehicles. The trailer hitch I recommend for your 2004 Jeep Liberty is the Draw-Tite part # 75128. It's a Class-III with a 2-inch receiver. The maximum gross trailer weight is 5,000 pounds and tongue weight capacity is 500 pounds. If you plan on doing any towing, the wiring harness kit you need is the Tow Ready # 118524. Or if you already have a factory tow package then go with Hopkins custom...
    view full answer...

  • Easy to Install Wiring Harness on 2004 Jeep Liberty
  • Since your 2004 Jeep Liberty does not seem to have the factory 7-way, the easiest to install 4-way that fits your Jeep is the Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 42475. You'll only need to plug this into your Jeep's harness, and getting to that is likely going to be the most difficult part as you'll have to remove some interior paneling to find it. Then for lights, I recommend going with LED marker lights. Ten marker lights is quite a bit...
    view full answer...

  • Missing Red Power Wire for Hopkins Wiring Harness # 42475 on 2006 Jeep Liberty
  • The Hopkins Wiring Harness # 42475, does not require a wire be ran to the battery for a power source, this is why there is not a Red wire included in the packaging. In the original design of the wiring harness Hopkins recommended the separate power wire be ran to the battery. Later, Hopkins found that the Jeeps wiring harness supplies enough power for trailer lights, so the wiring harness was redesigned, and the separate power lead is not required or included. Hopkins has just not updated...
    view full answer...

  • Hopkins 5-Way Vehicle and Trailer Connectors # HM47890 Recommendation For Charging Trailer Battery
  • You will need to run a wire from the positive post of the battery on your 2005 Jeep Liberty to the black wire that runs to your trailer battery. This will charge the battery of your trailer while the wire is connected. I would recommend you cut off the the 4-ways that are on your vehicle and 1988 Jayco popup and then install 7-ways instead so you could have a designated trailer battery charging circuit that would charge your trailer battery when it was connected. For this, I would...
    view full answer...

  • Routing a Power Wire for a Trailer Wiring Harness on a 2002 Jeep Liberty
  • The only other trailer wiring harness available for a 2002 Jeep Liberty is # 42475 and it will only work if the vehicle came with a factory tow package. For all other models, you need to use the T-Connector harness, # 118524. Running a power wire to the battery is required because it provides the power to the trailer lights while at the same time protecting the wiring on the vehicle. The connection is required or the harness will not work. Routing the wire to the battery is not difficult...
    view full answer...

  • How Do you Access the Factory Light Connector for Part 42475 on a 2002 Jeep Liberty
  • If you look closely at Figure 1 of the instructions the hook should be to the right of the power port. You may have only a screw there. Remove the threshold panel first, Figure 2 part B. Then remove the screw and gently pull back the panel. The panel does run from the floor of the cargo area to the roof. Nothing should be separated. Just lift the panel up gently till you find the gray connector. It should be about 6 inches above the floor and 12 inches from the tail light.
    view full answer...

  • Installation of a Tekonsha PRIMUS IQ Electronic Brake Controller # TK90160 in a 2007 Jeep Liberty
  • If you do not have any trailer connectors at the rear of your vehicle you would first need a Hopkins Custom Fit Vehicle Wiring # 42475 to give you a 4-way connector at the rear of your vehicle. The plug you are looking for is located behind the paneling in the back of the vehicle on the passenger side. I attached installation instructions for you to check out. Next, you will need a Brake Controller 7 & 4 Way Installation Kit # ETBC7 so you can convert the 4-way to a 7-way connector....
    view full answer...

  • Comparison of Curt and Hopkins Wiring Harness for 2002 Jeep Liberty
  • The Curt Wiring Harness # C55382 connects behind the tail lights of your 2002 Jeep Liberty. So you need a connector on each side to power the 4-pole. However, the Hopkins Harness # 42475 connects behind a panel in the rear compartment on the passenger side of your Jeep and doesn't connect on both sides. It's really just a matter of the harnesses plugging in at different places. They're both correct. The catch is that you'll need to make sure your Jeep has the connector behind the...
    view full answer...

  • Recommended Wiring to Flat Tow A 2005 Jeep Liberty And Still Have 4-Way Trailer Wiring
  • Since you want to flat tow your 2005 Jeep Liberty and you want to be able to tow with it, I recommend the Roadmaster Diode 7-Wire to 6-Wire Flexo-Coil Wiring Kit # RM-15267. This will allow you to have a connection on the front of your Jeep for a motorhome wiring connection and will allow you to use diodes to protect and use your factory wiring. This wiring kit allows you to add a 4-way flat to the rear of the vehicle for towing your boat, using the Hopkins Plug-In Simple Vehicle...
    view full answer...

  • Recommended Wiring For Trailer When Tow Bar Wiring Is Present At Tail Lights
  • For your 2007 Jeep Liberty, if you have a t-connector harness like the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118524 which connects behind the driver and passenger side tail lights as you mentioned you will not be able to connect the trailer and the tow bar wiring simultaneously. I've attached a video that shows how we run the wiring behind the rear bumper from side to side and how we run the power to the battery through the frame. You do have another option...
    view full answer...

  • Fit of Hopkins # 42475 Trailer Wiring Harness on 2003 Jeep Liberty w/o Tow Package
  • The Hopkins # 42475 Trailer Wiring Harness is compatible with all models of the 2003 Jeep Liberty, regardless of whether it has the tow package or not. I've confirmed this with my contact in the Tech services department at Hopkins.
    view full answer...


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




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