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

Hopkins Custom Tail Light Wiring Kit for Towed Vehicles

Part Number: HM77VR
In Stock
$101.42
Flat Tow Wiring Harness

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

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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.
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  • Reviews (20)
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Hopkins Flat Tow Wiring Harness - HM77VR

Highlights

  • Plug and Play Harness: Eliminates cutting and splicing for effortless installation.
  • Custom Fit Design: Tailored to seamlessly fit behind your vehicle's tail lights.
  • Integrated Diodes: Safeguard vehicle electronics against RV electrical feedback.
  • Weatherproof: Protects delicate components, ensures durability in harsh conditions.
  • Combined Lighting System Ready: Brake light relay optional with supplemental braking systems.
  • 4-Way Flat Plug: Convenient connection between towed car and motorhome's existing wiring.

Features to know about

Plug and Play Simplicity: Custom-Fit Wiring Harness

Say goodbye to splicing and complex wiring with the Hopkins Custom Tail Light Wiring Kit. This kit is designed to plug right into your vehicle's existing wiring, eliminating any need to cut or splice wires. Just plug it in and go, making it perfect for seamless installations in any setup.

Safeguard Your Systems: Integrated Diodes Protection

Worried about electrical feedback from your RV? This kit includes integrated diodes that protect your vehicle's electrical system from potential interference. With these diodes, you can tow safely knowing your car's setup is safeguarded during every journey.

Tailored for Your Vehicle: Custom Design

Why settle for generic solutions when the Hopkins kit offers a custom design? It's tailored to fit specific vehicle models, ensuring an exact match with the existing wiring setup of your car. This ensures efficient and reliable towing without modification hassles.

No Weather Woes: Weatherproof Box for Durability

Towing in harsh weather conditions is no problem with the Hopkins kit. The harness comes housed in a weatherproof box, keeping the built-in diodes and wiring connections safe from the elements. This increased durability means it withstands rain, snow, and more.

Brake Light Compatibility: Optional Relay Reassurance

For those with a combined lighting system, this kit caters to your needs by offering compatibility with a brake light relay (sold separately). This ensures your brake signals behave correctly even when using a supplemental braking system, so you stay visible and safe on the road.

Complete Package Convenience: Included Hardware and Brackets

Get everything you need right in the box! This wiring kit includes all necessary hardware and mounting brackets, providing a comprehensive solution you can trust. It's designed to make installation straightforward, allowing you to focus more on the road ahead.

56012 Hopkins Plug-In Simple Dinghy Towing Harness



This Product Fits The Following Vehicles



California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.7

20 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:

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

Andrew profile picture

Andrew

2/13/2025

Been a year now and the wiring harness has worked perfectly. I cannot recommend this product enough

Jerred H. profile picture
Etrailer Expert

Jerred H.

2/13/2025

@Andrew Thanks for the feedback! Glad it's working out so well for you!


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:

Worked as stated



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:

Installed this over a year ago. Instillation was super easy. Have had zero issues.



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Very simple installation



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Everything works great



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2022 Ford F-150



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2024 Ford F-150



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2022 Ford F-150



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2024 Ford F-150



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2023 Ford F-150


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


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 Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Amanda K
Written by:
Amanda K
Employee Ethan H
Video by:
Ethan H
Employee Jesse B
Test Fit:
Jesse B

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