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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
$54.12
Custom Fit Vehicle Wiring

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Hopkins Custom Fit Custom Fit Vehicle Wiring - 42475
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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 (89)
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Hopkins Custom Fit Vehicle Wiring - 42475

  • 4 Flat
  • Custom Fit
  • Trailer Hitch Wiring
  • 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 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:


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   (89 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:

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:

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



by:

This is a true plug and play. It is so nice to get something that does what it should.



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:
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:

Quick shipping
Easy install
Right
part
Righteous company
Many Thanks



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:
2006 Jeep Liberty

Simple and easy. Takes minutes.



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:
2003 Jeep Liberty

I installed Hopkins Plug-In Simple Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
Item # 42475 this morning and the harness went in without any problems and it functional checked as well. Sorry about not having pics, as I was in a hurry to get it done and forgot . I did find it easiest to pull the plastic panel behind the back seat on the passenger side out in order to access the plug for the tail lighting.



by:
Jeep Liberty

The wiring harness was easy to install, and it worked perfectly fine. I am happy to be able to hitch the trailer to the Jeep Liberty.



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


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

  • 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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  • 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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  • 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 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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  • 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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  • 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 Wiring...
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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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    Image 1 for
  • 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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    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. I...
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  • Trailer Wiring Recommendation for a 2015 Ford Fusion Titanium
    The Curt Wiring Harness part # C56351 that you referenced has been confirmed as a fit for your 2015 Ford Fusion Titanium. The part number # 42475 that you also referenced is for Jeep vehicles and would not work.
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  • Compatibility of T-1 Connector with Brake Controller on 2003 Jeep Liberty.
    The Brake Controller will be compatible with your T-1 Connector. You will need part # ETBC7, which is our Brake Controller Install Kit. The Kit comes with everything needed to install your brake controller, including a 7-way trailer connector adapter that will plug directly into your existing 4-pole trailer connector. If you have not yet decided on a brake controller, check out the Tekonsha Prodigy P2, part # 90885. The P2 is our best selling controller, primarily because it is so...
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  • Recommended Wiring Harness for 2003 Jeep Liberty
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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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  • 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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  • Trailer Wiring Harness Options for a 2002 Jeep Liberty
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  • Connection Point For a Hopkins Trailer Wiring Harness on a 2006 Jeep Liberty without Tow Package
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  • Trailer Wiring Harness Recommendation for a 2005 Jeep Liberty
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  • Recommended Wiring For Trailer When Tow Bar Wiring Is Present At Tail Lights
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  • Troubleshooting Hopkins Plug and Play 4-Pole Trailer Wiring Harness 42475 for 2003 Jeep Liberty
    A 4-pole wiring harness like Hopkins # 42475 combines the stop and turn light signals from the Liberty onto one wire for each side of the trailer. The green wire carries passenger side brake and turn signals and the yellow carries the same two signals for the driver side of the trailer. If you have a left brake light signal but you are finding that you do not have a left turn signal this could mean that one of the pins inside the vehicle or harness connectors is not making proper contact...
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  • Hopkins Trailer Wiring Harness for a 2003 Jeep Liberty
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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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    Image 1 for
  • 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...
    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...
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