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

Hopkins Custom Tail Light Wiring Kit for Towed Vehicles

Part Number: HM77VR
$100.39
Flat Tow Wiring Harness

Will this fit?

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

Add to cart
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. 1-800-940-8924 to order Hopkins flat tow wiring harness part number HM77VR or order online at etrailer.com. Free expert support on all Hopkins products. Great prices and Fastest Shipping for Hopkins Custom Tail Light Wiring Kit for Towed Vehicles. Flat Tow Wiring Harness reviews from real customers.
  • All Info
  • Reviews (13)
  • Q & A (0)
  • Videos (1)
  • Photos

Hopkins Flat Tow Wiring Harness - HM77VR

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

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.


Features:

  • 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.



56012 Hopkins Plug-In Simple Dinghy Towing Harness



This Product Fits The Following Vehicles




Video of Hopkins Custom Tail Light Wiring Kit for Towed Vehicles

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Complete Breakdown of the Hopkins Custom Tail Light Wiring Kit for Towed Vehicles-HM77VR

Hello everybody, this is Jeff at etrailer.com. Today we're gonna take a look at the Hopkins custom taillight wiring kit for towed vehicles. Now this is a custom fit part. It is designed to fit the 2021 and newer Ford F150, F150 Hybrid, and the F150 Raptor trucks. And on a custom fit part like this, I do like to recommend for you to go to our website, use the fit guide, put in your year, model, vehicle, and it'll show if this will work for your application. Now this kit here will let you wire your vehicle to accept your RV's tail brake and turn signal lights for flat towing.

As you can see right here, provides the four-way flat plug at the front of the tow car to connect to your motor home. Does have a length of white wire with an eyelet on it that'll connect to a nearby ground. Basically right here, it'll plug in quickly and easily. There's no cutting or splicing of wires. The connection points are located under the hood on the driver's side inner front fender.

This kit does prevent electrical feedback to safeguard your towed car's electrical system. Has this weatherproof box here, helps keeps the built-in diodes protected. Also, this won't interfere with your electrical system when the towed car is not hooked up to the RV. As we've mentioned, it's custom designed for your vehicle. It does include everything laid out here on the table.

The wiring harness with the four-way, the four-way mounting bracket, and the hardware, four-way dust cover, some terminal grease, and some extra cable ties to take up any slack in the wiring. Now a brake light relay may be required if you're using this with a supplemental braking system. That brake light relay we do sell separately, goes by a part number of RM-88400. But that should do it for the review on this Hopkins custom taillight wiring kit for towed vehicles.

Customer Satisfaction Score:


Customer Reviews

Hopkins Custom Tail Light Wiring Kit for Towed Vehicles - HM77VR

Average Customer Rating:  4.5 out of 5 stars   (13 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.

by:

This doesn't work on 2 of the 3 vehicles that I use to tow the pickup. One is a chevy silverado 2019 and the lights work fine. When I plug the pu into either a dodge flat bed truck or My Newmar motorhome the lights on the f150 will not work.

Brooke M. profile picture
Etrailer Expert

Brooke M.

10/17/2024

It sounds to me like there is an issue with the four flat on your motor home and the connection on your Dodge because if the issue was with part # HM77VR it wouldn't work on the Chevy. So, you can use a circuit tester and test functions on the four flat to start with. You can also check out this FAQ page that walks you through some troubleshooting. I would take a look at method 1 in the attached link.



by:
2024 Ford F-150

Just as information on the etrailer website under the description of the Hopkins wiring kit it says that it hooks up behind the tail lights. That is not correct it plugs in under the hood. In the case of my 2023 F-150 Platinum no brake light relay kit is required. I purchased one due to E-trailers recommendation but on my truck none was required.



by:
2024 Ford F-150 Raptor

Hate to say your tech person was of no help they never mentioned this Hopkins harness as an option. They suggested the Roadmaster set up which is no cheaper and requires splicing of wires and a whole lot more work. I discovered the harness from an RV forum site. Other than that, love the harness, easy plug and play no wire splicing can’t imagine using anything else!



by:

Figment was perfect and operates as expected. Just plug and play with no splicing needed.



by:



by:



by:



by:
2023 Ford F-150



by: 08/16/2024
2022 Ford F-150



by:
2022 Ford F-150



by:
2024 Ford F-150



by:



by:


13
13

See what our Experts say about this Hopkins Flat Tow Wiring Harness

Do you have a question about this Flat Tow Wiring Harnes?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Amanda K
Written by:
Amanda K

At etrailer.com 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.


Product Experts Available Now!
Call 1-800-940-8924