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  1. Flat Tow Wiring Harness
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Hopkins Custom Tail Light Wiring Kit for Towed Vehicles
Hopkins

Hopkins Custom Tail Light Wiring Kit for Towed Vehicles

Part Number: HM56004
In Stock
$63.74
Retail:$102.09
You Save: 38%
Flat Tow Wiring Harness

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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 HM56004 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 (17)
  • Q & A (0)
  • Videos (1)
  • Photos

Hopkins Flat Tow Wiring Harness - HM56004

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


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.



11156004 Hopkins Plug-In Simple Dinghy Towing Harness

Replaces 56004



This Product Fits The Following Vehicles



California residents: click here


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 All About the Hopkins Custom Tail Light Wiring Kit for Towed Vehicles

Hello neighbors, it's Brad here at etrailer, and today we're taking a look at the Hopkins plug and play diode wiring kit for your flat towed vehicle. Now, these are not available for all vehicles. There's a bunch of different vehicles that are able to be flat towed, and only a few of 'em have this wiring kit. But if your vehicle does fit into our fit guide, and this is a confirmed fit, you're in luck. Because this is truly just a plug and play, there's no cutting or splicing required. Go ahead and plug these in.

So pretty straightforward. It can only really go in one way. So we'll get this one popped in. Take the other connector plug here, plug that into the tail light. Now other diode kits are pretty straightforward, but there is cutting and splicing that needs to be done to the wiring on the taillight.

And a lot of these small taillight wires from the factory are pretty small and you're putting spade connectors on there and they do work well. But if you do have a loose connection, you may have faulty wiring, and there are quite a few points where you're gonna tie into those, and that's the glory of this kit. You can literally just plug this in, and it's gonna be a factory style connection, making it super easy. You don't have to worry if all of your crimps weren't done properly. Now with this kit, you are still gonna have to run wiring underneath your vehicle, and during that process you're gonna wanna make sure that you don't hit any exhaust, the suspension parts, or anything moving really, just, you want to keep that wiring nice and safe.

And following factory wire loom is generally a pretty safe route to get back to your plugs, and then up to the front. So your six pole is going to have your wiring up front and through the RM umbilical that's gonna transfer not only a 12 volt, so if you're using a charge line, but also your running lights, your brake lights, as well as your turn signals, and that's gonna keep you safe and legal. Now, diode wiring is a really nice thing to have if you plan on flat towing quite often. And that's because a lot of other vehicles that you see flat towed, you're gonna see some magnetic lights that are stuck here. And a lot of times you can get wireless ones, but sometimes you have to run a cable all the way to the RV.

And diode wiring is just nice, because when you plug in your umbilical, you not only can you send 12 volt power through there to a charge line if you want to, but also you're gonna mimic all the turn signals, running lights, and brake lights on the towed vehicle. Now diode wiring is gonna be part of the five main components required for flat towing your vehicle. So along with that, you also have your base plate, which is gonna be the attachment point on the front of your car, your tow bar, which you'll connect it to. You also have your safety cables here, just in case of an accidental disconnect. It's gonna hold that vehicle together, and also your braking system, which will have a breakaway switch allowing that vehicle to come to a stop if it does become disconnected. But also it's going to slow and stop the vehicle as you apply the brakes on the RV. When it comes to setting up your vehicle for a flat tow, we have plenty videos available on a variety of different cars. So using the fit guide on our website is gonna help you find those videos to make sure that you get your installation done. And we're always here to help. So if you need to, you can always give us a call, and we'll make sure that you're able to flat tow your vehicle. Now diode wiring is pretty common to go with the Roadmaster. That's what we see a lot of with our installs, and it's a great system. It's universal, so it works on pretty much every vehicle. But if your vehicle fits into the fit guide, having this Hopkins wiring, I highly suggest it. It's super easy and it just takes a little bit of headache and guesswork out of splicing into wires. This one, plug and play, ready to go. So if this is an option for your vehicle, I highly suggest it..

Customer Satisfaction Score:


Customer Reviews

Hopkins Custom Tail Light Wiring Kit for Towed Vehicles - HM56004

Average Customer Rating:  4.8 out of 5 stars   (17 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:
2003 Ford Ranger

The install was easy. I read the directions first which importantly pointed out that the connector to attach the new plug was located behind the bumper. The web site details led me to believe the connector was behind the tail light. The rest was just routing the wires along the frame to the front of the vehicle. The only part requiring thought was deciding where to put the plug.



by:
Roadmaster

Had to change out the flat 4 pin trailer connector for a 6 way round connector to match the Roadmaster Nighthawk tow bar but was easy enough.



by:

Actually works. Easy, custom connection. Made it so I don't have to string cheesy magnetic lights every time I tow my 2003 Ford Ranger.



by:
2008 Ford Ranger

Product arrived as noted by vendor and in good condition. Examined the contents and was surprised the installation instruction are vague---had to go online to get what I assumed was instructions for my vehicle?? I was not sure of myself to install so I will get a mechanic install----to important to screw it up---photo not available



by:

George.......All is well with the wire kit, works perfectly....s.



by:

Easy to understand instructions- I'm colorblind and still figured it out.



by:

Worked well and may to install.



by:

James

3/19/2024

Great Working perfectly



by:

Works great!! I have used this at least twice a week and had no issues!



by:

I doubt you could beat this package anywhere. I love it and a simple install.



by:

The only diffecult thing about installing this was getting under the truck. It worked as expected.



by:

Easy install. Wo great. Fast shipping. Best price.



by:

Plugged right in with no difficulty.



by:

Quick and easy! Perfect fit!



by:

Good product! Plugged right in.
Than
ks.



by:
2007 Ford Ranger

Great product, easy install. I highly reccomend this.



by:
2003 Ford Ranger


17
17

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

  • Tow Bar Wiring Recommendation for 2001 Ford Ranger
    For tow bar lighting for your 2001 Ford Ranger you would want the Hopkins Kit part # HM56004 which is a custom fit setup for your vehicle. The connectors plug inline with the taillight connectors on your truck and allows your RV to control them. If your tow vehicle has a 7-way you would want the part # HM47065 to use as an umbilical adapter to span distance between RV and Ranger.
    view full answer...
  • Recommended Flat-Tow Wiring Harness for a 2008 Ford Ranger
    The Hopkins Custom Tail Light Wiring Kit for Towed Vehicles part # HM56004 is what I recommend for a 2008 Ford Ranger. It will do a great job of transferring the tail light signals from the motorhome to the toad. It's a completely plug-in-play option and the only one of its kind.
    view full answer...
  • Where is the Connector for Installing the Hopkins Tow Bar Wiring on a 2002 Ford Ranger
    Look at the connector that attaches directly to the light assembly. I attached a picture that shows what the connector will look like that you would need to use.
    view full answer...
    Image 1 for
  • Parts Needed To Flat-Tow a 2008 Ford Ranger Sport
    In order to flat-tow a 2008 Ford Ranger Sport you'll need a tow bar, base plates, safety cables, braking system, and wiring. I have attached for you below my recommendation on each of these components. Roadmaster Crossbar-Style Base Plate Kit part # 477-1 Roadmaster Falcon All Terrain, Non-Binding Tow Bar part # RM-522 RoadMaster 68" Single Hook, Coiled Safety Cables part # RM-643 Roadmaster Even Brake Portable Supplemental Braking System part # RM-9400 Hopkins Custom Tail Light Wiring...
    view full answer...
  • Recommended Towing Setup 4 Down Behind RV for 2000 Ford Ranger
    For your 2000 Ford Ranger with manual transmission, it is flat towable but not recommended to exceed 55 mph. For your flat towing system, I recommend starting with the Roadmaster XL Base Plate Kit - Removable Arms # 483-1 which are a custom fit for your truck. Then I recommend using the Roadmaster StowMaster Tow Bar - Car Mount - 2" Ball - 6,000 lbs # RM-501 which will allow you to use a standard ball mount behind your motorhome and will stow on the front of your Ranger when not in use...
    view full answer...
    Image 1 for Image 2 for

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


Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Lindsey S
Written by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video by:
Dustin K
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

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