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Hopkins Tail Light Converter Kit with 4-Pole Flat Trailer Connector

Hopkins Tail Light Converter Kit with 4-Pole Flat Trailer Connector

Item # HM48925
Our Price: $29.17
Trailer Wiring

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Shipping Weight: 0.56 lbs
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Install a 4-way trailer connector on your vehicle with this wiring harness with tail light converter. Harness splices into existing wiring to adapt your vehicle's 3-wire tail light system for use with your trailer's 2-wire system. Great Prices for the best trailer wiring from Hopkins. Hopkins Tail Light Converter Kit with 4-Pole Flat Trailer Connector part number HM48925 can be ordered online at or call 1-800-940-8924 for expert service.
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Hopkins Trailer Wiring - HM48925

  • Trailer Connectors
  • Vehicle End Connector
  • 4 Flat
  • Plug and Lead
  • 6 - 10 Feet Long
  • Hopkins

Install a 4-way trailer connector on your vehicle with this wiring harness with tail light converter. Harness splices into existing wiring to adapt your vehicle's 3-wire tail light system for use with your trailer's 2-wire system.


  • 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)
  • Hardwires to existing harness behind vehicle's tail lights
  • Includes a tail light converter to ensure that your vehicle's wiring matches that of your trailer
  • Double-molded, weatherproof converter resists damage
  • Protective connection terminals resist corrosion
  • Comes with dust cap for 4-way flat connector, cable ties, and terminal grease packet for electrical connections


  • Maximum amperage: 2.1 amps per circuit
  • Overall harness length: 72"
  • Wiring configuration:
    • White: ground wire
    • Red: brake light
    • Green: right turn signal
    • Yellow: left turn signal
    • Brown: park/tail lights
  • 90-Day limited warranty


This tail light converter is designed to splice into the tail light wiring harness at the rear of your vehicle. Match the color wire on the converter with the same function wire on the tow vehicle.

It is recommended that you use a small amount of grease on the 4-pole connector to help prevent corrosion.

48925 Hopkins Powered Tail Light Converter Kit with 4-Way Flat Connector

Installation Details HM48925 Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Hopkins Tail Light Converter Kit with 4-Pole Flat Trailer Connector - HM48925

Average Customer Rating:  4.7 out of 5 stars   (105 Customer Reviews)

Install a 4-way trailer connector on your vehicle with this wiring harness with tail light converter. Harness splices into existing wiring to adapt your vehicle's 3-wire tail light system for use with your trailer's 2-wire system.


Outstanding! Solved my motorcycle to trailer wiring nightmare easily. My hats off to Sheila for finding a great solution. My old Gold Wing now can safely tow our equally old Bushtec, which we also updated with new LED lights from etrailer.


This Hopkins light converter works great, is small and simple. I used it to create a converter cable from a Euro 13-pin plug to a US 4-pin flat plug. Works great and is small enough to keep the cable compact.


Perfect product, perfect for the job I needed

Was the perfect choice
Les C - 04/29/2023

2002 Volkswagen Eurovan

I bought this for my 2002 Eurovan to wire up some safety lights for my hitch bike rack, and it was exactly what I needed! I appreciate that eTrailer has reasonable prices, unlike some VW van specialty sites.

2015 Volkswagen Jetta

Not worth the money. It does do the job, but u're better off searching for one that has the splicing connectors for the same or less .

We do not have any quick connects for your 2001 VW Jetta Sedan TDI unfortunately.
-- Etrailer Expert Sierra K - 05/18/2022

Saturn Relay

Installed easily. Wire colors were not the same as my car, but it wasn't hard to figure out what hooked to what. I would have given 5 stars had the four required tap connectors been included with the harness. Trailer lights and flashers worked just fine on the first attempt - didn't even need to change the turn signal relay to prevent high speed flashing.

Fine and dandy!
Jemecad - 08/04/2017


Easy install. Great service.


A great product, easy to install and works perfectly


etrailer is the real deal. The hitch and inverter package I purchased is high quality. heavy duty and built to last. Shipping was free and speedy during this time of so many slow downs.
I would definitely recommend to others. Thnx!


Works with L E D lights

2003 Volkswagen New Beetle

This kit was just what I needed for my situation. With the variety of vehicle light combinations, and various power requirements, trailer connections can get complicated. But etrailer seems to have exactly what is needed in each situation.
Once you choose the correct Hopkins kit, ordering is easy, and shipment is quick.

The unit is still performing flawlessly. I highly recommend where this particular unit is suitable.
NM_Bob - 03/28/2019

1997 Nissan Quest

Great product

2006 Honda Element

Installed on a 2006 Honda Element. Found an etrailer video on youtube to help me with the wiring and everything was perfect. The device installed behind my left tail light, and I had to use a butt splice connector and some extra wire to lengthen the wire to reach the right turn signal. Even those steps were spelled out in the video.

Great website and support. Would order again from etrailer.

2004 Ford Escape

etrailer provided me with a great experience ordering a trailer hitch, a wiring kit and accessories at a competitive price. I found their web site is easy to use for finding all the components I needed to purchase and they delivered them when promised.


Not only was I pleased with the speed and efficient manner this was shipped, but due to age had a company install this unit for me. They wanted to know where I got unit for this old of an automobile and we're glad that everything they needed was right there to be installed. In this day and age it's nice to deal with such professional companies like


It wired up nice and easy. It’s very compact the instructions are very clear. Great customer service. Though it was a bitch to figure out which wires deadwood on my particular cars taillights, I had to test each wire to figure out what its function was in order to hook the correct wires together. A lot of people on YouTube were using quick splice Connectors, I soldered all of my connections. I recommend doing that

2000 Buick Park Avenue

Product was exactly as described. Only thing that i encountered different than the instructions listed ,, Stated match wiring color to color. Well it is hard to connect green to green for right turn signal when there is NO green
wire for my right turn signal. It is actually tan. So color codes don't always match. The product works great and is used to supply power to my Jazzy hauler. Does what i purchased it for. Very happy with the product and excellent service from etrailer.

Nissan Xterra

Using on a not OE Trailer built Xterra, desined for tis vehicle so should work fine

2004 Volkswagen Golf

The wiring harness works perfectly on my 2004 VW golf TDI. Not sure why I needed the electronic controller for my car, but this is what was recommended, and it works.


this is exactly what I needed to upgrade my truck for wiring

fantastic. this is a high quality item
Bruce - 01/14/2022


Installed fairly easy. Fit was exact. The carriage bolts for this frame need to be an inch shorter. Would have been nice to include a splice kit for the electrical. Installer should have adequate mechanical ability. Good product. Arrived promptly. Would shop here again.


Took all of 40 minutes to install and wire up. My suggestion is to make sure to have a deep well 3/4 inch socket and an impact. It will save a bunch of time. Also get quick splices for easy wiring of your harness. Other than that pretty east stuff.

2016 Toyota Tacoma

Converter replaced the original U-Haul unit that was installed with new hitch when my 2001 Toyota Tacoma was just purchased. I guess the old unit had an internal failure as the RH brake light quit working on my trailers. The new one works as it should and I hope to get another 16 years or so from it


Ease of installation, good directions, works perfect from start, would get one again in future.

all in good working order
Tom S - 06/26/2020


Worked perfectly as designed.

Show More Reviews

See what our Experts say about this Hopkins Trailer Wiring

  • Trailer Wiring Recommendation For A 2000 Lexus LX 470
    When it comes installing trailer wiring on your 2000 Lexus The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector 118365 will not fit your vehicle. The wiring harness you would need is The Hopkins Tail Light Converter Kit with 4-Pole Flat Trailer Connector # HM48925. I have attached a review video link below.
    view full answer...
  • Trailer Wiring Harness that Fits 1994 Ford Aerostar
    The only trailer wiring harness we offer for the 1994 Ford Aerostar is the Hopkins part # HM48925 that you referenced. This kit installs by splicing into the taillight wires of the van. We do not have a plug and play type option like you mentioned.
    view full answer...
  • Troubleshooting Hopkins Tail Light Converter Not Getting 12 Volts Power on the Vehicle Side 4-Way
    I recommend checking the ground connection on the Hopkins Tail Light Converter Kit # HM48925 as it may not be making sufficient contact with a suitable ground connection. To ensure it is not the ground connection you can run a temporary jumper wire to the battery negative terminal and retest your voltage. This would also explain why the lights are even dimmer when the headlights are on. Be sure to check the voltage going into the converter to ensure that you are getting 12 volts from your...
    view full answer...
  • Does Hopkins Tail Light Converter Require Power From Battery?
    The Hopkins Tail Light Converter Kit with 4-Pole Flat Trailer Connector # HM48925 does not have a wire to tap into from your vehicle's battery. It is designed so you can spice into the taillight wiring harness at the rear of your 2005 Dodge Durango. I have attached the installation instructions for you to take a look at.
    view full answer...
  • Recommended Trailer Wiring Harness for a 1990 Jeep Wagoneer
    For your 1990 Jeep Wagoneer I recommend the Hopkins, part # HM48925, which is confirmed to fit. It's a universal wiring harness that includes a conveter and provides a 4-way connetor at teh back of your Jeep.
    view full answer...
  • Does Hopkins Trailer Wiring # HM48925 Fit 2004 Audi A6
    Yes, the trailer wiring harness part # HM48925 is a confirmed fit for your 2003 Audi A6. This is a universal style harness though which will require you to test the wiring of your taillights and wire to the # HM48925 accordingly.
    view full answer...
  • Why Is Taillight Converter Needed for Trailer Wiring on 2005 Toyota 4Runner
    The converter aspect of the trailer wiring for your 2005 Toyota 4Runner is not a voltage converter. Instead it converts the taillight signals to match what trailer wiring requires. Trailer stoplight and turn signals are carried on the same wire and some vehicles have the turn signals and the stoplights carried on two different circuits. That's where the converter of the part # HM48925 comes and changes the vehicles separate circuits to combined and allows the trailer taillights to function...
    view full answer...
  • Running Lights and Turn Signal Not Working on One Side of Trailer
    On the trailer side is the 5 indicating that it is a 5-Way flat connector or that it is a 4-Way with 5 wires? On a 5-Way flat the 5th pin is usually for an electric reverse lockout on a surge coupler so it would not have any effect on the lights. If it is a 4-Way with 5 wires then that is a wishbone harness which means that the running light pin has 2 wires, 1 for each side of the trailer, for running/tail lights. Since some of the lights are working and some are not it could just be a...
    view full answer...
  • Recommended Trailer Wiring Harness for 2006 Honda Element
    For your trailer wiring that does not require a separate power wire from the battery of your 2006 Honda Element, I recommend the Hopkins Tail Light Converter Kit with 4-Pole Flat Trailer Connector # HM48925. I've attached the installation details to further assist with the installation.
    view full answer...
  • Troubleshooting Trailer Wiring on 1999 Chrysler Cirrus Where all 4-Way Pins Have Voltage
    If all of the wires have voltage when the signal lights come on typically that is a sign of a shorted out converter box of the wiring part # HM48925. You can test this by checking for voltage on all of the wires leading into the box to see if the correct voltage is on the wires when the appropriate turn signal is applied and then check the output side of the box. Is correct on the input side then the box is shorted out. If not then it is wired wrong. Before you replace the harness check...
    view full answer...
  • Will Hopkins Tail Light Converter Kit # HM48925 Fit a 2008 Hyundai Accent
    Hopkins Tail Light Converter Kit # HM48925 can be used on pretty much any vehicle since it is a hardwire kit. The 2008 Hyundai Accent (sedan and hatchback models) are represented in the list of fits though because it is such a big list it is easy to miss it.
    view full answer...
  • Troubleshooting the Hopkins Tail Light Converter Kit # HM48925 on 2004 Nissan Xterra
    The Hopkins Tail Light Converter Kit with 4-Pole Flat Trailer Connector # HM48925 is not compatible with LED lights. The correct wiring harness for use with LED lights is the Hopkins Tail Light Converter Kit with 4-Way Flat Connector - LED Compatible # HM48895.
    view full answer...
  • Troubleshooting Hopkins Tail Light Wiring Converter
    It sounds like you may just need to replace your wiring converter with one made for use with LEDs, the Hopkins LED Compatible Tail Light Converter Kit # HM48895. This is designed to work with the lower power draw of high-efficiency LED lighting. If you test the motorhome wiring and confirm that the signals are present there as they should be then either your converter is damaged or it is simply the wrong one for your application.
    view full answer...
  • Trailer Wiring Harness for a 1998 Toyota Tacoma
    If you want to hardwire in a trailer connector to your 1998 Toyota Tacoma then you can use # HM48925. It is just more work though when you could use a harness that plugs in line with the vehicle tail light wiring such as # HM43315. But it is totally up to you. You should not have to have any sort of special flasher or load resistors for the unit to work. That sort of thing is only an issue on certain applications with LED lights on the vehicle side and almost never affects the trailer...
    view full answer...
  • Hopkins Tail Light Harness/Powered Convertor For a 2015 Honda Gold Wing Motorcycle
    The Hopkins Tail Light Converter Kit # HM48925 will allow you to connect to the wiring on your 2015 Honda Gold Wing. This will give you the common 4-way flat wiring connector that is used by most small trailers. It uses a powered converter to tie into the battery and send power for the lighting from the battery rather than putting excess strain on the factory wiring. The Hopkins Fold-Over Mounting Bracket for 4-Way Flat Trailer Connector # HM48595 will allow you to secure the 4-way on...
    view full answer...
  • Correct Hopkins Wiring Harness for a 2010 Toyota Yaris Hatchback
    The Hopkins Plug-In Simple Vehicle Wiring Harness # HM11141844 is for a 2010 Toyota Yaris Sedan so since you have the Hatchback model you'll need the Hopkins Wiring Harness # HM48925 instead. This is a splice-in kit which will still be effective and work, it just won't be a plug and play-type installation like the part you were looking at. Attached is a review video and the installation instructions for you to check out.
    view full answer...
  • Is The Hopkins Tail Light Converter HM48925 Correct For A 2001 Mitsubishi Montero Sport?
    I would be happy to help! The Hopkins Tail Light Converter Kit # HM48925 you were looking at is the correct wiring harness for your 2001 Mitsubishi Montero Sport. This kit is a universal kit that will get spliced into your factory tail light wiring to power your trailer connector. It is different than what is needed for the non-sport models as those models have a harness available that will plug in inline of the factory tail light connectors, and would not require any splicing. If you...
    view full answer...
  • Best Trailer Hitch Receiver For 2008 Ram 1500 Towing 5,000 lb Trailer With 600 lb Tongue Weight
    There is one option that is going to get the job done for your 2008 Ram 1500 to tow your nearly 5,000 lb trailer with a 600 lb tongue weight, which is from Draw-Tite: - Draw-Tite Ultra Frame Trailer Hitch Receiver # 41929 The Draw-Tite # 41929 is the best for your Ram 1500 because while most hitches for your '08 Ram have a maximum tongue weight capacity of 600 lbs - and you don't want to be at the absolute limit - this hitch has a 1,200 lb tongue weight capacity, as well as 12,000 lbs...
    view full answer...
  • Do I Need A Heavy Duty Flasher To Install A Wiring Harness On A 2004 Ford Escape
    Neither the Hopkins Tail Light Converter Kit with 4-Pole Flat Trailer Connector part # HM48925 or the Upgraded Circuit Protected Tail Light Converter with 4-Pole Flat Trailer Connector part # 119178 will require you to use a heavy duty flasher while towing with your 2004 Ford Escape with or without the factory tow package. Each of the lighting circuits on the wiring harness has a 2.1 amp max draw, therefore this is not problematic for your factory wiring circuit. I will say that it will...
    view full answer...
  • Troubleshooting Left Turn Signal Working Only Part of Time on Boat Trailer
    The issue you are experiencing is likely a bad ground connection. It sounds like it worked, then didn't, and now works again which definitely sounds like the ground connection. I recommend checking your main ground connection on your boat trailer if there is a consistant spot on your frame. If not, then I recommend checking the ground connection at your tail lights. There is sometimes a separate ground wire for each light and other times the ground is through the mounting hardware on...
    view full answer...
  • Draw-Tite Hitch Ground Clearance on 2012 Hyundai Accent
    With the Draw-Tite Sportframe Trailer Hitch Receiver # 24884 you will have approximately 8" of clearance to the bottom of the hitch on your 2012 Hyundai Accent. Please be aware that this is an estimate as if your particular vehicle may have larger or smaller diameter tires. Also the amount of weight that is being carried inside your Accent will change your hitch height as well as aged suspensions may sag a bit due to age. I recommend installing the Hopkins Tail Light Converter Kit # HM48925...
    view full answer...
  • Trailer Hitch Fit For 1985 Jeep Wagoneer
    We do have a trailer hitch fit for your 1985 Jeep Wagoneer, but no OEM hitches. The correct fit for your Jeep is the following: - Draw-Tite Max-Frame Trailer Hitch Receiver # 75054 If you wanted to tow with your '85 Wagoneer and also needed a 4-way wiring harness the correct part is the Hopkins Tail Light Converter Kit with 4-Pole Flat Trailer Connector # HM48925.
    view full answer...
  • Turn Signals Come On With Brake Lights When Towing
    It sounds like there may a wiring issue or a bad converter. When installing the Hopkins Tail Light Converter Kit part # HM48925 you want to hook up the wires to the following on your 2005 Honda Element. Wires on converter - White (ground) connects to Black wire on Element Brown (tail light function) - connects to Red and Black wire on Element Yellow (left turn function) - connects to Green and Yellow wire on left side of your Element Red (brake function) - connects to green wire on Element Green...
    view full answer...
  • How To Identify Correct Wires On 2004 Ford Escape To Install Hopkins Tail Light Converter HM48925
    I would be happy to help! On your 2004 Ford Escape you do in fact have separate wiring like you mentioned meaning that the turn signals and brake lights are powered by separate wires so the Hopkins tail light converter kit # HM48925 you purchased is correct. To confirm the functions of your factory wiring you will need to use a circuit tester like # PTW2993 while having a friend turn on the turn signals, apply the brakes, and turn on the head lights one at a time. The wiring configuration...
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
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Jameson C
Employee Adam R
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Adam R
Employee Jeffrey L
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Employee Lindsey S
Edited by:
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Employee Kathleen M
Installed by:
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Employee Wilson B
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Employee Alexander C
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