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Hopkins Powered Tail Light Converter w/ 4-Way Flat Trailer Connector and Install Kit

Hopkins Powered Tail Light Converter w/ 4-Way Flat Trailer Connector and Install Kit

Item # 46365
Our Price: $76.74
Custom Fit Vehicle Wiring

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This kit converts your vehicle's lighting system to match that of your trailer's. Includes a 4-way flat, 57" harness, wire taps, and a power wire that pulls power directly from your battery. 1-800-940-8924 to order Hopkins custom fit vehicle wiring part number 46365 or order online at Free expert support on all Hopkins products. Great prices and Fastest Shipping for Hopkins Powered Tail Light Converter w/ 4-Way Flat Trailer Connector and Install Kit. Custom Fit Vehicle Wiring reviews from real customers.
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Hopkins Custom Fit Vehicle Wiring - 46365

  • Trailer Hitch Wiring
  • 4 Flat
  • Universal Fit
  • Converter
  • Hopkins

This kit converts your vehicle's lighting system to match that of your trailer's. Includes a 4-way flat, 57" harness, wire taps, and a power wire that pulls power directly from your battery.


  • 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)
  • Ensures that your vehicle's wiring matches that of your trailer
  • Avoids overloading your vehicle's electrical system by connecting directly to your battery
    • Power wire and fuse kit included
  • Designed with safety in mind
    • Guards against electrical shorts and mis-wire situations
  • Splices into your vehicle's wiring with the included quick-splice connectors
    • Color-coded wires ease installation
  • Includes durable, molded-rubber, female output socket with protective dust cover


  • Application: vehicles with 2-wire or 3-wire electrical systems
  • 4-Way harness length: 57"
  • Splice-in wire length:
    • Brown, red, yellow: 11"
    • Green: 72"
  • Ground wire length: 11"
  • Power wire length: 20'
  • Maximum amperage: 8 amps per circuit
  • Wire gauge: 14
  • 90-Day limited warranty

Do I Need A Tail Light Converter?

Difference between 2 wire systems and 3 wire systems

Some vehicles operate on a 3-wire system, wherein the brake signal and the turn signals run on separate wires to illuminate different lights. (Typically, these vehicles have amber turn signals.) But most trailers run on a 2-wire system, which means the brake and turn signals travel along a single wire. You'll notice that, on your trailer, the brake light will flash for the turn signals.

If your vehicle operates on a 3-wire system, it will need to be converted so it will be compatible with the wiring system of your trailer. This is where a tail light converter comes into play. This converter lets you combine the brake and turn signal functions of your vehicle so they run on a single wire to properly activate your trailer's tail lights.

Powered by Your Battery

This converter won't overload or cause damage to your system because it pulls power straight from your vehicle's battery. So you can be sure that your trailer lights will activate no matter what type of bulbs your vehicle has - or your trailer, for that matter.

Converter Wiring Configuration

Wire Color Wire Function
Green Right turn
Brown Tail lights and parking
Red (small) Brake
Red (large) Battery power
White Ground
Yellow Left turn

Powered Tail Light Converter Installation

This kit comes with all the wiring you'll need to convert your vehicle's lighting system to match your trailer's. The powered converter box has splice-in wires on one end and a harness with a 4-way flat vehicle-end connector on the other. It also comes with a power wire that will connect to your battery so your electrical system doesn't get overloaded.

To begin the installation, use a circuit tester (sold separately) to double-check the function of each wire on your vehicle's tail light wiring harness. The color/function of the splice-in wires on this converter may not match the color/function of those on your vehicle, so you'll want to be sure to check all of the wire functions first. Once you've figured out the functions of your vehicle's wiring, use the included quick-splice connectors to connect the corresponding wires on the trailer connector. Quick-splices, or "wire taps," offer a quick way to make connections without you having to strip and twist wires. Just place the wires in one of the taps and snap the cover down.

Using double-sided tape, stick the converter box to a flat surface inside your vehicle near the tail lights. It's helpful to clean the surface first so the tape can adhere fully.

Once the converter box is spliced in, you need to run the power wire up to your battery. Be sure to remove the fuse before connecting anything so you don't blow it! You can put it back in once everything has been installed. To hook up to your battery, you'll need to disconnect the negative cable from your battery and attach the power wire to the positive terminal with the included ring terminal.

How to find a grounding point

Find a raw, unpainted metal surface to use as a grounding point and secure the white ground wire using the self-tapping screw. Cleaning the surface before securing the white wire will ensure the converter is fully grounded. If you have a 2-wire system, the red brake wire will need to be grounded as well. You can do that in the same way, using an extra ring terminal (sold separately). Finally, secure the converter wires to your vehicle using included cable ties.

Quick Tip:

  • Butt connectors - especially heat-shrink ones - provide the most secure, longest-lasting connection, so we'd recommend you grab a few and swap them out for the quick-splices in this kit.
  • Use a circuit tester on the plug terminals once the harness is installed to make sure everything's working. There's nothing worse than figuring out that you have a bad ground or a faulty connection right before you're about to hit the road.
  • Be sure to put a little bit of dielectric grease on the 4-way plug to protect the terminals from dirt, grime, and corrosion.

46365 Hopkins Vehicle Wiring Harness with Vehicle End 4-Pole Connector and Powered Converter - 57" Long

Installation Details 46365 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Hopkins Powered Tail Light Converter w/ 4-Way Flat Trailer Connector and Install Kit - 46365

Average Customer Rating:  4.7 out of 5 stars   (17 Customer Reviews)

This kit converts your vehicle's lighting system to match that of your trailer's. Includes a 4-way flat, 57" harness, wire taps, and a power wire that pulls power directly from your battery.


Works PERFECTLY! Plenty of wire. everything I needed to convert my trailer hookup for LED lights. Beats paying $109.00 for the other guys converter! This is my 3rd purchase from Etrailer & I can't say enough about their quality service! I'd buy here before anywhere else!

Frankie A.


Hi Installed my converter on a 98 Valkyrie w a CSC Trike kit on it. Ive converted ALL the lights to LED and connected to a Harbor Freight trailer w/ LEDS. Works GREAT! Im having a small problem with trailer turn signals at the moment, but that is a wiring problem on MY part! I WILL continue to purchase product from etrailer! Fast response, shipping and product assistance! Wonderful!

Mercedes-Benz Sprinter

I bought the converter box with a hitch for my Sprinter. It was easy to install and works fine. It did not interfere with the MB lighting system monitor, and functions flawlessly. Highly recommend the Converter and etrailer.

Bill B.


Everything is still working as it should. So glad I saved the money and went with your product.


This product worked perfect for one day. The second day we used it connected to a trailer it melted and almost caught on fire. I have not found any of these light adapters that work for more than a week but this one almost caught on fire.

Etrailer Expert

Victoria B.


If you are consistently having issues with tail light converters, it sounds like there may be a short somewhere on your trailer or vehicle that is overloading the system. To check for a short, it is a good idea to check all of the wires running from your lights to the converter. Make sure they are not frayed or damaged and allowing the wires to touch bare metal on your trailer or vehicle. If you find any damage, replace or repair the wire to stop this wire short. Also, this converter does have a comparatively high amp rating at 8 amps per function. This amp rating would allow for more heat to build up in the unit before melting the circuits inside the converter.


For years I had trouble with my trailer lights working properly until I installed this wiring harness kit. Having the hot wire come from the battery all the way back to the converter made all the difference. Now I can confidently plug in any variety of trailers and know that the lights will work the first time without any fussing around. This was definitely a great investment for my vehicle.

2008 Audi A3

I did this install at the same time with the hitch. Several steps are worth doing only once since a couple of panel and turn signals are out already. Goggle helped with some steps that were specific to my Audi A-3.

1999 Toyota 4Runner

Purchased this product for my 99 Toyota 4runner after the stock unit quit working.
I have towed a trailer many times and unit still works perfectly.

Mercedes-Benz Sprinter

I appreciate your prompt shipping as I needed the product failrly quickly. I especially like the videos that are available on YouTube that demonstrate the installation from start to finish. It works and works well !


It's great to have a company like etrailer .
I will be telling all my friends about etrailer
Charlie B


etrailer is a great company! My orders always arrive on time, and I've never had a problem with items I've ordered.


Was easy to install and is working well so far


Customer support was very helpful in specifying all the components needed for our project.After the order was placed all the items were received quickly!


fast service excellant product

2000 Mercury Grand Marquis

all in time thanks


Very good service and quick to make sure i would get it when i needed it.





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

  • Troubleshooting No Brake Lights Working After Hopkins Wiring Install # 46365
    You will need to use a circuit tester like part # PTW2993 to find the circuit that only sees voltage when the brakes are applied and use it for the stoplight circuit for the # 46365. It sounds like maybe you haven't found the correct circuit to use yet and that is why the stoplights aren't working. You should note that the recommended trailer harness is the part # 118526 that is a custom fit harness that would be much easier to install than the # 46365. I attached an install video
    view full answer...
  • Recommended Trailer Wiring Harness for 2017 Toyota Tacoma
    The Plug-N-Tow (R) Short Proof Powered Taillight Converter - Heavy Duty # 46365 can be used on your 2017 Toyota Tacoma and will work fine. However, I recommend a wiring harness that makes installation easier and doesn't require splicing that also draws power from the battery to protect your vehicle's electrical components. I recommend the Curt T-Connector # C56349. This harness plugs into your factory wiring already present behind the tail lights with quick connects and then a hot lead...
    view full answer...
  • Adding a 7-Way Trailer Connector to a 2004 Toyota Sequoia without Factory 7-Way
    First, if your 2004 Toyota Sequoia did not come with a factory installed 7-Way trailer connector then replacement connector # 20137 is not going to fit. The connection points will not be present to plug it in. If no factory harness is present you will need to hardwire in a 7-Way. To hardwire in a 7-Way you will need 2 parts, 4-Way flat harness # 46365. Then to add a 7-Way you will need # ETBC7. I have included links that explain the ETBC7 installation for you. It is odd that your Sequoia...
    view full answer...
  • Trailer Hitch for a 2013 Honda Civic SI Sedan
    I did some digging and found that the Curt trailer hitch # C11391 does fit the 2013 Honda Civic Sedan si model so you can use it. I have included a link to the installation instructions for you. If you will be using the hitch for something like a bike rack or cargo carrier you will need to make sure that the accessory is rated for use on a Class I trailer hitch. Class I trailer hitches are limited to 2 bikes maximum. Curt recommends the use of a stabilization strap, # 18050, for all non-trailer...
    view full answer...
  • Trailer Wiring Harness for a 2013 Hyundai Sonata Hybrid
    I checked with the manufacturers we carry and there is an option from Hopkins, # 46365. But this is a hardwire wiring harness and not a plug and play type of harness. This means you will have to test the vehicle wiring with a circuit tester such as # 3808 and then splice in the harness wires accordingly. You will want to consult your vehicle owners manual for information on towing with the Sonata. Many hybrids are not rated for towing and the hitches for them should be used only for accessories...
    view full answer...
  • Adding a 4-Way Trailer Connector to a European Motorhome Towing an American Trailer
    In order to provide a compatible 4-Way at the rear of your 2008 National RV with European taillight system for use with an American trailer, you will need to hardwire the 4 Pole Harness and Hardwire Kit, # C59496. You will need access to the wiring behind each taillight on the RV. Use the included circuit tester to test the wires for function. On the harness, the yellow wire is left turn signal, the brown wire is running lights, the green wire is right turn signal, the red wire (ran to...
    view full answer...
  • Which Hopkins Trailer Wiring Kit Fits 2000 Honda Civic
    The Hopkins trailer wiring harness part # 46255 that you referenced is a confirmed fit for the 2000 Honda Civic coupe or sedan. If you happen to have a hatchback instead you would want the part # 46365 instead.
    view full answer...
  • Trailer Wiring Harness Recommendations for a 2004 Jeep Liberty
    I checked with Hopkins and they show # 46255 or # 46365 as the hardwire options for your 2004 Jeep Liberty. But you do not have to splice a harness into the vehicle wiring because there are options that plug in line with the vehicle tail light wiring such as # 118524. I have linked a video showing how it installs. If you are apprehensive about routing a power wire to the front of the vehicle it is actually easy, just time-consuming compared to the rest of the installation. I have linked...
    view full answer...
  • High Capacity Taillight Converter for Trailers With Multiple Lamps
    The Hopkins # 46365 has a pretty good 8 amp per function capacity, so it should work for you. Because they draw a fraction of the power of an incandescent lamp, you might consider switching to LED lamps on the trailers that have multiple lamps. I've linked to some product description videos for the items mentioned above.
    view full answer...
  • Trailer Wiring Recommendation for a 2013 Chevy Express Van
    What I would recommend you get is a Curt Custom Fit Vehicle Wiring # 55540. This wiring kit plugs inline with the tail lights of your vehicle and will activate the trailer lights of your small trailer. Curt has determined that you do not necessarily need a powered unit like the Hopkins Converters # 46255 or # 46365 and since your trailer only has two lights on it I think the # 55540 would work well for you. The main difference between the # 46255 and the # 46365 is that the # 46365 can...
    view full answer...
  • Why Would Plug-N-Tow (R) Short Proof Powered Taillight Converter Fail
    Trailer shorts often times take out the converter boxes like the 46365 that you have. Most likely something shorted out and damaged it. The boxes are designed to fail like this though as a way to protect the vehicle wiring. Basically you would will to go over your trailer wiring looking for any shorts from cut or exposed wire, fix as necessary and then replace the converter.
    view full answer...
  • Trailer Wiring Harness for a 2013 Nissan NV1500 Van
    The trailer wiring harness # 118597 will only fit the 2013 Nissan NV200. It will not fit the 2013 Nissan NV1500. For the NV1500 Hopkins has harness # 46365 as a fit for the NV van but it is a hardwire installation, not a T-connector style. You will need to use a circuit tester such as # PTW2992 if you need one and test the tail light wires of the vehicle. On the harness, white is ground, red with the butt connector on it gets attached to the positive battery terminal via the in line fuse...
    view full answer...
  • How to Test Hopkins Converter kit # 46155 For Internal Short
    If you have 12 volts on the power wire of the Plug-N-Tow (R) Short Proof Powered Taillight Converter # 46365 and you tested it like you did then the converter has an internal short and would need to be replaced. Also make sure the fuse holder has a good fuse in it too. Test the wires going into the box of the converter box for voltage with a circuit tester like the # PTW2993 to see if there is voltage going into the box when the taillight functions of your vehicle are applied, and then...
    view full answer...
  • What Advantages Does a Powered Taillight Converter Offer over a Factory Harness
    This system draws power directly from the battery which means it will support more lights on the trailer and it since it is using a separate power source it will not damage the vehicle light circuits in case of a short or excessive power draw. If you are using a trailer with more than just two tail lights and two side markers, this would probably be a good upgrade. If you are towing a small boat or personal watercraft, you may also want to use something like this as a short is more likely...
    view full answer...
  • Will a Hopkins Trailer Wiring Harness 46255 or 46365 Fit a 2002 Mazda Protege5
    You could use either wiring harness, # 46365 or # 46255 on your 2002 Mazda Protege5. The difference is that the 46365 is a newer design with added circuit protection. They will both install the same way. You will need to use a circuit tester like # PTW2993 to test the vehicle tail light wiring to install these harnesses. On the harness there is a red wire with a butt connector that connects to the positive battery terminal via the fuse and fuse holder included. The white wire is ground,...
    view full answer...
  • Ground Wire Problems With 7-way Adapter On 2008 E350 Econoline Van
    You went the right way when you checked the ground wire first. You will need to make sure all of your ground connections are good. The ground connection at the vehicle is especially important because it must travel through the connector to the trailer frame. The connector on the trailer should be secured to a clean surface on the trailer frame and each taillight assembly must be grounded either through the mounting bolts or a separate wire from the taillight to the trailer frame. When...
    view full answer...
  • Trailer Wiring Harness Options for a 2004 Volkswagen Passat Wagon All Wheel Drive 6 Cylinder
    You have 3 trailer wiring options for your 2004 Volkswagen Passat. You can use Curt harness # C59236, Hopkins harness # 46365, or Curt harness # C59496. They all install in the same way and perform the same functions.
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  • What Parts Are Needed to Use Hitch on a 2007 Nissan Murano and How are They Installed
    For your 2007 Nissan Murano, you will need the following parts: Curt Hitch Class 3, 2 inch hitch part # 13571 is one of our best selling for your Murano and it requires no drilling for installation. Curt Ball Mount part # C45010 is the manufacturer recommended ball mount for this hitch and pin part # PC3, or lock part # e98880 to hold it in place. You will also need to select a ball that will fit both this ball mount and the trailer coupler. The ball mount uses balls with a 1-inch shank...
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  • Brake Lights for Trailer, Cargo Carrier, and 2008 Chevy HHR
    We have a kit that will get your lights working. The Plug-N-Tow Short Proof Powered Taillight Converter, part # 46365, pulls power from your car battery to power your tail lights. The kit will route power from the battery directly to the lights on the trailer and cargo carrier, while the vehicle tail-lights operate as a controller switch. The power routed from the battery to the converter that will be spliced inline with your existing 4-pole connector will power your lights.
    view full answer...

Info for this part was:

Employee Mike L
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Patrick B
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Employee Jameson C
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Employee Jeff D
Installed by:
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Employee Alexander C
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