bing tracking image
  1. Tow Bar Wiring
  2. Hopkins
  3. Wiring Harness
  4. Plugs into Vehicle Wiring
  5. Custom
  6. Tail Light Mount
Hopkins Custom Tail Light Wiring Kit for Towed Vehicles

Hopkins Custom Tail Light Wiring Kit for Towed Vehicles

Item # HM56302
Our Price: $60.37
You Save: 41%
Tow Bar Wiring

Will this fit?

To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.

This item qualifies for Free Shipping
Shipping Weight: 1.33 lbs
In Stock
Hopkins Tow Bar Wiring - HM56302
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Need help with installation?
Locate installers near me
Wire your vehicle and get the signal lights required for flat towing without having to splice into your wiring with this custom, plug-in harness. Integrated diodes prevent feedback from RV for safe operation. Wires as combined lighting system. Great Prices for the best tow bar wiring from Hopkins. Hopkins Custom Tail Light Wiring Kit for Towed Vehicles part number HM56302 can be ordered online at or call 1-800-496-5010 for expert service.
  • All Info
  • Reviews (14)
  • Q & A (0)
  • Photos
  • Why etrailer?

Hopkins Tow Bar Wiring - HM56302

  • Wiring Harness
  • Plugs into Vehicle Wiring
  • Custom
  • Tail Light Mount
  • Hopkins

Wire your vehicle and get the signal lights required for flat towing without having to splice into your wiring with this custom, plug-in harness. Integrated diodes prevent feedback from RV for safe operation. Wires as combined lighting system.


  • Lets you wire your vehicle to accept your RV's tail, brake, and turn signal lights for flat towing
    • Wires towed car as combined system so that brake and turn signals travel along same wire
    • Provides 4-way flat plug at front of towed car to connect to motor home
  • Plugs in quickly and easily - no cutting or splicing of wires
    • Connection points are located behind your vehicle's tail lights
  • Prevents electrical feedback to safeguard towed car's electrical system
    • Weatherproof box keeps built-in diodes protected
  • Won't interfere with electrical system when towed car is not hooked up to RV
  • Custom designed for your vehicle
  • Includes wiring harness, mounting bracket, and installation hardware
    • Extension loop for connecting towed car to RV is sold separately
    • Brake light relay (RM-88400 - sold separately) may be required if used with supplemental braking system
  • 90-Day warranty

Wiring Your Towed Car with Hopkins

Wiring your car for flat towing has never been easier. No more testing wires or splicing into your electrical system. No need to painstakingly position multiple diodes beneath your vehicle. No worries about voiding your warranty. With this custom-fit towed vehicle wiring kit from Hopkins, all you have to do is plug the harness into your vehicle's existing wiring, which is located behind your car's tail light assemblies. No cutting, tapping, or splicing is required.

After plugging in the wiring harness, use the included bracket to mount the 4-way flat connector at the front of your towed car. An extension loop (sold separately) is required to connect your towed car to your RV.

Changing from a Separate to a Combined Lighting System

Your vehicle ordinarily operates on a 3-wire system, wherein the brake signal and the turn signals travel along different wires to illuminate different lights. (Typically, this means that your vehicle will have amber turn signals.) This is referred to as a "separate lighting system." When you hook up for flat towing using this harness, however, your towed car's lighting system will operate in a combined fashion. This means that the brake and turn signals sent by your RV to your towed car will be carried on a single wire. As a result, your car's brake lights will do the flashing for the turn signals. Your vehicle will still function as designed - with separate lighting - when not hooked up to your RV.

Do You Need a Brake Light Relay?

Because this harness wires your vehicle as a combined system, a brake light relay (RM-88400 - sold separately) may be required if you use a supplemental braking system with your towing setup. A supplemental braking system depresses the brake pedal in your towed car every time you apply the brakes in your RV. So, if your towed car's brake lights illuminate when the brake pedal is pressed and the engine is off - as is the case when towing - then you need to install a relay to ensure that the lights on your towed car always act in accordance with the signals sent by your RV via the wiring harness. Without a relay, the brake signal from your towed car will override the turn signal sent by your RV when you slow down to make turns, creating a potential hazard.

11156302 Hopkins Plug-In Simple Dinghy Towing Harness

Replaces 56302

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Hopkins Custom Tail Light Wiring Kit for Towed Vehicles - HM56302

Average Customer Rating:  5.0 out of 5 stars   (14 Customer Reviews)

Wire your vehicle and get the signal lights required for flat towing without having to splice into your wiring with this custom, plug-in harness. Integrated diodes prevent feedback from RV for safe operation. Wires as combined lighting system.


After a year of on the road the lights function perfectly
The wiring was easy to install just plug and go
I run one extra wire to my motorhome with a small light on instrument panel to tell me
When the brake lights are on just for me to know if lights are working on car

2009 Honda Fit

I have made purchases for two different vehicles. Both were used for four wheel down towing. Each time etrailer gave me correct information on the products and promptly shipped and delivered them. Best of all they fit correctly and no surprises. I will use them again.

thank you for touching base with me. All the products seem to be fine.They are in use
Rick I - 05/05/2018

2013 Saturn Relay

I installed this harness in my 2013 Honda Fit. The installation was simple. This option uses the brake light for the turn signal vs. utilizing the dedicated amber bulb, but it works just fine. I also have a Roadmaster Even Brake that did require the brake switch relay for this setup to work properly since the brake light and turn signal uses the same bulb.


Every thing was plug and play. I won't know if it works until I tow. Had to install RM88400 but that's another review.

Still working well.
Joseph S - 07/02/2020

2013 Honda Fit

Arrived on time. quality made product and easy to install. I actually ran the 4 pin connector wire to the front of my 2013 Honda Fit via the front and rear door thresholds. Once I reached the brake pedal I removed the side panel where the hood latch is located and fed the wire through the rubber grommet hole for the door electric switches. I then used a coat hanger and pulled the wire through the inner fender and down to the front grill. Under the hood I clean it all up with some zip ties. This will keep the line from being exposed to the elements.

2013 Honda Fit

The kit worked perfectly with the assistance of etrailer's U-tube tutorial. The hardest part of the job was finding a wire route under the car since there are very few fastening points for the cable ties.

2010 Honda Fit

Exact fit for my Honda Fit for towing. Quality product and arrived quickly.
Thank you

2013 Honda Fit

Product worked great. I chose to route the wiring inside the vehicle under door trim. It was actually pretty easy. I went through the firewall where the large bundle goes through above the brake peddle for a very clean install. Super easy install in the back.


Very easy to install. Fit my 2012 Honda Fit perfectly. One year later it's working perfectly. Everything I've bought from this company I'm extremely happy with.


Easy installation!!

2012 Honda Fit



2011 Honda Fit


See what our Experts say about this Hopkins Tow Bar Wiring

  • Easy to Install and Use Tow Bar Wiring Recommendation for 2013 Honda Fit
    For tow bar wiring for a 2013 Honda Fit that is easy to install and use I would recommend the Hopkins Kit part # HM56302 which installs by plugging inline with the taillight harnesses and does not require any hardwiring.
    view full answer...
  • Easy to Install Tow Bar Wiring Kit that Fits 2009 Honda Fit
    This is a good question but trailer wiring cannot be used in reverse to act as tow bar wiring. But we do have a plug and play option that does fit your 2009 Honda Fit with the part # HM56302 which is what it sounds like you are looking for.
    view full answer...
  • Availability of 8 Foot Flat Towing Umbilical with 7-Way on One End and 4-Pole Flat on the Other
    There's not an available 7-way to 4-pole flat umbilical like what you're looking for, but I do have some easy solutions for you. The Hopkins Nite-Glow 7-way to 5-way flat coiled adapter, part # HM47025 will work with either a 4-pole or a 5-pole trailer connector. It would plug right into the connector at the front of the towed vehicle provided by the Hopkins Towed Vehicle Wiring Harness you referenced, part # HM56302. If the unused socket bothered you, you could cover it with a small piece...
    view full answer...
    Image 1 for
  • Wiring to Connect Motorhome to 2010 Honda Fit That's Being Flat Towed
    The base plate has mounting points for either a 6 or 4 way round connector to attach, but the connectors aren't included with the base plates. I'd recommend cutting off the 4-pole flat provided by the Hopkins # HM56302 flat towing wiring harness and installing the 4 pole round connector provided with the 7-foot long Blue Ox 7-way to 4-pole round cord, part # BX88254. I've linked you to some of our flat towing FAQ articles.
    view full answer...
  • Flat Towing a 2011 Honda Fit With Blue Ox Alpha Tow Bars
    Yes, the Blue Ox Base Plate # BX2253 will work with the Alpha Tow Bar that you have or its newer Alpha 2 # BX7380. I suggest consulting your owners manual/manufacturer to ensure your specific 2011 Honda Fit is capable of being flat towed. You will need the Hopkins Tail Light Wiring # HM56302 to operate the taillights of your Fit when towing. This is a plug and play kit so no splicing will be required. A Roadmaster FuseMaster # RM76511 can be utilized to bypass the removal of the radio...
    view full answer...
  • Best Flat Tow Wiring Harness for a 2010 Honda Fit
    In regards to the Tow Ready Tail Light Isolating Diode System part # TR118821 and the Roadmaster Universal Hy-Power Diode Wiring Kit part # RM-154, the Tow Ready kit will be easier to install as more of the wiring connections are already made for you but the Roadmaster kit takes up less space because the diodes are physically smaller. That is really the only difference between them. In regards to the Roadmaster Tail Light Wiring Kit for Towed Vehicles part # RM-152-LED, there will be...
    view full answer...
  • Availability of Blue Ox System to Flat Tow a 2013 Honda Fit Sport With Fog Lights
    The Blue Ox flat towing system for the 2013 Honda Fit Sport with fog lights is the same as the 2012 model. The Blue Ox Base Plates, part # BX2253, will fit both the 2012 and 2013 Honda Fit Sport with fog lights. These base plates would be compatible with the Blue Ox Alpha Tow Bar, part # BX7380. In addition to the base plates and tow bar, you will also need safety cables, lighting, and supplemental braking. The Alpha tow bar includes the safety cables. For a lighting solution, I'd recommend...
    view full answer...
  • Baseplate And Flat Towing Accessory Recommendations For 2012 Honda Fit
    Congratulations! Yes, the # 521190-1 is a match for both your 2012 Honda Fit and your Falcon 2 tow bar. When setting up a car for flat-towing, it's important to not only have the right tow bar and baseplate, but also a braking system such as the Roadmaster Even Brake # RM-9400 , the correct vehicle wiring such as the Hopkins # HM56302 Custom Wiring Kit, and a good pair of safety chains such as the Curt # C80151 Another thing you'll likely need after you install the baseplate is a high-low...
    view full answer...
  • Can a 2013 Honda Fit Be Flat Towed
    I have a copy of the 2013 Honda Fit Owners Manual that I found online, and it states that both manual and automatic transmission equipped Fit models can indeed be towed behind a motorhome IF the specific procedures shown are followed. You can find this information by doing a Google search on '2013 Honda Fit Owners Manual'. Be sure to read the instructions carefully and completely, as they're pretty specific and if they aren't followed to the letter, you can damage the drivetrain of your...
    view full answer...

Do you have a question about this Tow Bar Wiring?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate tow bar wiring information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Lindsey S
Updated by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Jeff D
Installed by:
Jeff D
Employee Bradley B
Installed by:
Bradley B
Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video by:
Dustin K
Employee Chris R
Video Edited:
Chris R

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.