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 # HM56005
Our Price: $56.85
You Save: 44%
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.

Orders above $99 qualify for Free Shipping
Shipping Weight: 1.26 lbs
In Stock
Tow Bar Wiring HM56005 - Custom - Hopkins
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


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. Great Prices for the best tow bar wiring from Hopkins. Hopkins Custom Tail Light Wiring Kit for Towed Vehicles part number HM56005 can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (1)
  • Q & A (0)
  • Photos
  • Why etrailer?

Hopkins Tow Bar Wiring - HM56005

  • 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.


  • Lets you wire your vehicle to accept your RV's tail, brake, and turn signal lights for flat towing
    • 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.

Do You Need a Brake Light Relay?

Because your vehicle has a combined lighting system - wherein the brake signals and the turn signals are carried on a single wire - 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.

11156005 Hopkins Plug-In Simple Dinghy Towing Harness

Replaces 56005

This Product Fits The Following Vehicles

California residents: click here

Customer Reviews

Hopkins Custom Tail Light Wiring Kit for Towed Vehicles - HM56005

Average Customer Rating:  5.0 out of 5 stars   (1 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.

2007 Lincoln Mark LT

Great product, easy instructions fantastic service.


See what our Experts say about this Hopkins Tow Bar Wiring

  • Towed Vehicle Has No Brake Lights On After Replacing Damaged Connector On Motorhome
    The first thing I recommend is to use a circuit tester like part # PTW2993 and test all of the pins on the connector at the back of your motorhome. I do not think replacing the diode is going to be the issue, or you would have had issues with the turn signals as well. If you have the ground attached to a clean, bare metal surface and do not have a current showing on the brake circuit, the harness may need to be replaced. If you show current at the connector, the problem lies either...
    view full answer...
  • Flat Towing Setup Recommendation for a 2014 Ford F-150 STX-4x4
    I checked with Roadmaster and the part # 495-1A that you referenced has been confirmed to fit your 2014 Ford F-150 STX so it would work well for you. The InvisiBrake part # RM-8700 that you referenced has also been confirmed to fit your vehicle. There is a Hopkins wiring harness that will fit your vehicle, but the # HM56005 that you referenced would not fit your truck. Instead you would want the # HM56000. The Falcon Tow Bar part # RM-522 that you already have would work great as well. For...
    view full answer...
  • Parts Needed and Guidelines to Flat Tow 2002 Ford F-150 V6 4.2L 5-Speed Manual Transmission
    From my research, this is only true for RWD vehicles. So, as long as your 2002 Ford F-150 V6 4.2L 5-Speed Manual Transmission is a RWD, you can flat tow it as is, without any distance or speed restrictions and no other special instructions or additional parts are necessary. If you were unable to find this in your owner's manual, I highly suggest confirming the above information with a local Ford dealer. To flat tow your truck, you will need a set of base plates, a tow-bar, safety cables,...
    view full answer...
  • Equipment and Modification Needed to Flat Tow 2000 Ford F150 Behind RV
    According to my research, your 2000 Ford F150 would require a driveshaft disconnect in order to be flat towed without damaging the transmission. Once a driveshaft disconnect has been installed, you'd need a base plate kit, a tow bar, safety cables, an electrical connection to power the vehicle's taillights and a supplemental braking system. I really like the Blue Ox base plate/towbar systems. They are very well thought out, and I find their base plates to be easier to use. For a base...
    view full answer...
  • Can 2007 Ford F-150 Be Flat-Towed With Electric Winch Installed
    When installing base plates on your 2007 F-150 the base plates will be installed in the location where the tow hooks are and the tow hooks will be permanently removed. I was unable to determine how the Winch support you have on your truck is mounted but you can look at the attached installation instruction for the base plates to see if there will be an issue with both installed. The base plate kit I recommend for your F-150 is part # BX2169. For a tow bar I recommend the Blue Ox Avail,...
    view full answer...
  • Recommended Complete Flat Tow System For 2004 Ford F-150
    To use the factory plug ins of your 2004 Ford F-150 found behind the tail lights of your truck, I recommend the Hopkins Custom Tail Light Wiring Kit for Towed Vehicles # HM56005. This will give you a 4-way flat connector at the front of your truck. For the rest of your flat towing system, I recommend the Roadmaster XL Base Plate Kit - Removable Arms # 495-3A which I suggest installing using Loctite Threadlocker # LT37420. For your tow bar, I recommend the Roadmaster BlackHawk 2 All...
    view full answer...
  • Preparing A 2006 Ford F-150 For Flat Towing Behind A RV Motorhome
    I recommend using the Roadmaster Direct-Connect Base Plate Kit # 495-3A for your 2006 Ford F-150. This fits all models with the exception being the STX, FX4 or Harley-Davidson models. With these mounts you will not need to use a crossbar and will be able to connect directly to the Roadmaster BlackHawk 2 All Terrain, Non-Binding Tow Bar # RM-422. The tow bars have a rating of 10,000 lbs and are non binding tow bars that make disconnecting your vehicle easier. Channels are added to the tow...
    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 Leah B
Edited by:
Leah B
Employee Lindsey S
Written by:
Lindsey S
Employee Dustin K
Video by:
Dustin K
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Alexander C
Updated by:
Alexander C
Employee Bradley B
Installed by:
Bradley B

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.