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

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

Part Number: 42475
In Stock
$48.89
Custom Fit Vehicle Wiring

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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. 1-800-940-8924 to order Hopkins custom fit vehicle wiring part number 42475 or order online at etrailer.com. Free expert support on all Hopkins products. Great prices 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.
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  • Reviews (94)
  • Q & A (0)
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Hopkins Custom Fit Vehicle Wiring - 42475

  • 4 Flat
  • No Tow Package
  • Trailer Hitch Wiring
  • Vehicle End Connector
  • Plug-In
  • Hopkins
  • Plug and Lead
  • Converter
  • Visible

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 points in rear cargo area
    • Plug in connector
  • Includes a tail light converter to ensure that your vehicle'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 vehicle'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 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.


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 vehicle'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 vehicle operate.



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

Installation Details 42475 Installation instructions

This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.8

94 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:

Was able to install in 20 min.



by:
2004 Jeep Liberty

Product arrived very fast and was extremely easy to install



by:
2006 Jeep Liberty

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



by:

Works great just plug-n-play olny one screw to drive.



by:

Easy to install,instruction could be more clear



by:
2004 Jeep Liberty

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



by:
2004 Jeep Liberty

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



by:

Installs easy, directions are helpfull but are made to cater to all trim styles so the step by step do verey a little depending on year and trim.



by:

Simple to install and worked with no problems. I towed a trailer 300 miles the day after the installation.

Best part was that the item was quickly delivered to allow for me to help out a family member in moving.



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.



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



by:
2004 Jeep Liberty

Installation it was real easy. The hardest part was trying to find out where the harness plugs in at ( in the interior panel behind the passenger tail light),over an hour trying to Google the exact correct words to get the information I needed. It only took 15 minutes to install after that. I wish that the harness had come with even just a note of where the harness plug in was located hence only 4 stars. I can't figure out how to give 4 1/2 stars. Great product real quick delivery reasonabley priced and would do business with them again.



by:
2007 Jeep Liberty

Every part of this transaction was great.Quick delivery and easy installation



by:
2007 Jeep Liberty

Super easy to install. Perfect fit and length of wire to the hitch.



by:

George was a great help. Got me to right part and installation went well.



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.



by:

The wiring kit was easy to use. Installation was easy, the car was bit harder to work with. :)



by:

Quick shipping
Easy install
Right
part
Righteous company
Many Thanks



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.

John S. profile picture

John S.

4/10/2018

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!



by:

Recieved the hitch and writing promptly. Wiring was easy to install and works like a charm. Wish it came with some mounts for clamping it up as you pretty much have to depend on zip ties and all the vehicles structure. Took about 20-30 min to install and maybe an hour for non-mechanics.
Hitch took about half hour to install and works great. Very rugged. Was able to handle a small wreck while towing with no evidence of cracking.



by:
2007 Jeep Liberty

Pretty straight forward installation on my 07 Liberty. The hardest part was getting to the right plug in, as on my vehicle there was little slack wire, but it wasn't brain surgery.
Follow the directions, which were pretty good, and you'll be wired up in half an hour, and 25 minutes of that time is removing the plastic trim panels and re-installing them. Next vehicle I need to set up for trailering, I'll be checking etrailer first to see if a ready to go system is available.
2 months of frustration in trying to wire it stopped right here!



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.



by:

Very easy to set up and start towing. Much happier that I decided to buy the kit rather than buying the trailer plug and trying to wire it into the vehicle wiring myself.



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.



by:
2006 Jeep Liberty

Simple and easy. Takes minutes.


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Show More Reviews

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

  • 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.
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  • Recommended Trailer Wiring Harness For A 1995 Jeep Cherokee XJ
    Though we do have hardwire options available for your 1995 Jeep Cherokee XJ, there are no plug and play options currently available, unfortunately. If you decide to proceed with a hardwire kit, I highly recommend the Tekonsha # 119178KIT. This is a pretty quick and easy install and includes quick connectors, so no cutting will be needed. It's not plug and play, but it also isn't overly complicated either.
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  • 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.
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  • Where to Plug in Hopkins Vehicle Wiring Harness on 2007 Jeep Liberty
    You will plug the Hopkins Plug-In Simple Vehicle Wiring Harness # 42475 into your 2007 Jeep Liberty at the connectors which are behind the rear paneling on the passenger side. I have added a cut out which is from the linked directions that shows exactly where you will find the connectors. I have also added a link to a video review for you to check out of the Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 42475.
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  • Trailer Wiring Harness Fit For 2006 Jeep Liberty Without Factory Tow Package
    We have a wiring harness for your 2006 Jeep Liberty without the factory tow package but not the Hopkins # 42475 you mentioned. The correct trailer wiring harness for your '06 Liberty without the tow package is the following: - T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C55382
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  • 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...
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  • 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 need...
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  • 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 then...
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  • 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...
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  • 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 taillight...
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  • 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...
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  • Easy-Install 4-Pole Trailer Wiring Harness for Towing with 2004 Jeep Liberty
    Small utility trailers sometimes do not have lights and towing one of these naturally does not require the vehicle to have a trailer wiring harness, but larger trailers that are legally required to have lights will need the tow vehicle to have the appropriate type of wiring harness. Lighting requirements vary by trailer size and weight, and also by state; the linked article will help illustrate. It is easy to add a 4-pole wiring harness such as the USA-made Curt # C55382 that will provide...
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  • 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...
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  • 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 want...
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  • Recommended Trailer Wiring Harness for a 2006 Jeep Liberty
    The trailer wiring harness I recommend for a 2006 Jeep Liberty is the Curt T-Connector Vehicle Wiring Harness part # C55382 because it offers plug-play installation. It provides all the of the required lighting functions for a trailer and you don't even have to worry about running a power wire. Please note, in order to mount the trailer connector outside the vehicle you'll also need the Mounting Bracket 4-Pole Flat part # 18144. The Hopkins Plug-In Simple Vehicle Wiring Harness part #...
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  • 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 panel...
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  • Best 2 Kayak Carrier for a 2005 Jeep Liberty Renegade
    Your best bet in a 2005 Jeep Liberty Renegade is to obtain a hitch-mounted solution, such as a Malone EcoLight Trailer, part # MAL53FR According to my research, the 2005 Jeep Liberty Renegade is only rated for a maximum of 65lbs loaded on the roof, significantly limiting your options for carrying even one kayak because it can easily exceed your weight capacity from just the kayak alone. With a trailer like the Malone EcoLite, you open up a wealth of options for carrying multiple items...
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  • 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...
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  • Can I Install A Tow Bar Wiring Harness And A Trailer Wiring Harness At The Same Time?
    Hello Dean, good question. Yes, it is possible to install both a tow bar wiring harness and a trailer wiring harness at the same time. For your 2004 Jeep Liberty Sport, I recommend the Hopkins # HM56203 for the tow bar wiring, and the Tekonsha # 118524 for the trailer wiring. The two wiring harnesses will simply plug into each other. You will find install videos for both products linked below.
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  • Parts Needed to Add Brake Controller and 7-Way to 2002 Jeep Liberty & Trailer
    I can make a list for you of all the parts needed to add a brake controller and 7-way to your 2002 Jeep Liberty, and the prices can be found either on the product page or by scrolling down where the parts will be listed under "Products Referenced in This Question". So exactly what you will need for your 2002 Liberty is the following: - 4-Way (if your Jeep does NOT have the factory tow package): T-One Vehicle Wiring Harness # 118524 or (If your Jeep DOES have the factory tow package): Hopkins...
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  • 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.
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  • 4-Way Trailer Connector for 2002 Jeep LIberty
    We do have 4-way trailer connectors you can install on your 2002 Jeep Liberty, with the correct one depending on if you have the factory tow package or not. If you do have the factory tow package on your 2002 Liberty, the correct 4-way harness is the Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 42475. If you do NOT have the factory tow package on your Jeep, the correct 4-way harness is the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector...
    view full answer...
  • Does Hopkins Plug-In 4-way Connector 42475 For 2004 Jeep Liberty Require Additional Fuses?
    The Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 42475 you were looking at is confirmed to fit your 2004 Jeep Liberty Sport and will not require any additional fuses and does not require any upgrade to your blinker module. The # 42475 will plug into the existing factory connectors located behind the trim on the passenger side of the rear cargo area in your Jeep. Since the circuits are existing they are already fuse protected from the factory. I included...
    view full answer...
  • Recommended Wiring Harness for 2003 Jeep Liberty
    Yes, Hopkins 4-pole trailer wiring harness # 42475 is a confirmed fit on the 2003 Jeep Liberty and is one of the three such wiring products we offer for your Jeep. However, based on our experience with all the brands of wiring products we have for your Liberty I do recommend a different option, the T-One Vehicle Wiring Harness # 118524 from Tekonsha. I recommend this product over both other options (all are shown on the linked page) because we know Tekonsha products to be very reliable...
    view full answer...


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