1. Tow Bar Wiring
  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 Custom Tail Light Wiring Kit for Towed Vehicles

Item # HM56207
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Tow Bar Wiring

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Tow Bar Wiring HM56207 - Custom - Hopkins
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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. Lowest Prices for the best tow bar wiring from Hopkins. Hopkins Custom Tail Light Wiring Kit for Towed Vehicles part number HM56207 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (4)
  • Q & A (4)
  • Videos (2)
  • Photos
  • Why etrailer?

Hopkins Tow Bar Wiring - HM56207

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


  • 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.

11156207 Hopkins Plug-In Simple Dinghy Towing Harness

Replaces 56207

Installation Details HM56207 Installation instructions

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 Hopkins Custom Tail Light Wiring Kit Installation - 2011 Jeep Grand Cherokee

Today, this 2011 Jeep Grand Cherokee, we're going to review and install the Hopkins Custom Tail Light Wiring Kit for Towed Vehicles, Part number HM56207.This will provide all the signals you need. Turn signals, left and right, your running light circuit and your brake lights.You can use a bulb and socket in some vehicles, however, when you use a wiring system like this, you don't have to worry about drilling a hole in the back of your tail light and worrying about sealing up and getting moisture inside tail light when you're done installing it.Before we get ready to install, we'll cover the parts and which direction all the wires go. Pretty easy. The T-connector to yellow wire goes to the driver's side and the T-connection with the green wire goes over to your passenger side. Of course, the 4-pole wiring harness is going to go up towards the front of the vehicle.The kit also comes with a holder for a 4-pole flat, if you're going to stay with that, some zip ties to hold the wires, some screws for the bracket and some dielectric grease to protect your electrical connections and also a cap for a 4-pole.To start off our install, we remove both our tail lights. This is our driver's side here.

To do that, we'll take a flat blade screwdriver and work our way to the center of a rivet right here, and a lot of times you can pop it out, just like that. Sometimes it helps to have a special tool to help remove it as well. The trim panel tool will do just as good.To remove our tail light, there's a fastener here and here that has to be popped loose. You do that by pulling straight back on the light. Our wire harness will plug into the tail light right here.

To remove the wire harness from our tail light, we need to take a tab and unlock it. I'm just taking a screwdriver and pushing it back. Push down on this part right here, and then it comes apart.I'm going to take this wire harness apart, too, just to give us some more working room. Push down the the tab here and pull apart. This one also has a lock.

We're done with driver's side for now. We'll do this one more time over on the passenger side.To install our wire harness, we're going to need to pull up the T-connector yellow wire up behind the bumper cover to make our connections right here, so I'm going to use a pull wire to do that. My pull wire is a piece of airline tubing. I'll just run it down, but any piece of material you can run down there and pull back up will work.I'm just going to use some electrical tape to attach it to the tubing. We'll take a T-connector and plug it into the matching ends that was originally plugged into the tail light.

At this point, we can go ahead and reconnect our tail lights to the wiring. Push together until it clicks, and push in the red tab, and the same thing with the other wire, factory wire harness, up to the lower light. Tuck our wires away, and we can reassemble the light. We'll take our fasteners, get them started, push it in, and push the centers back in.This T-connector I'm going to run across, above the hitch, and over to the other side and back over to another pull wire to bring it back up. I'm running my wires over the bumper structure support here to keep it away from the exhaust as far as possible. Once again, we'll reconnect our matching ends and reinstall our tail light.We'll take this end, with a 4-pole, and run it underneath the vehicle and up towards the front, through the engine compartment, and back down to the front of the vehicle where electrical will be mounted on the baseplate.When we run the wire harness up towards the front, we want to stay away from anything moving, like suspension components or anything hot, like the exhaust. Yeah, you're going to get close, but we'll do the best we can.Starting off from back here behind our bumper, ran our wire up to the first wire harness here. Loosely follow it over the rear suspension, put over it . I zip-tied it to the top of this component right here to keep it away from all the moving stuff. Follow it on over to the side here, zip-tied where else I could, following some lines, went along the gas tank here, and there's a shield right here. I loosened up a couple of fasteners, just pulled down so I could tuck it in behind it.Working my way up towards the front here, I kind of stayed in this channel, and then to here, where it got close to the exhaust. I actually hid it behind the exhaust heat shield here. You can remove this nut with a 10 millimeter socket and just pop it loose and hide the wire behind it. I continued along the frame.Not much to work with the frame right here, so I used some loom clamps to help hold the wire up away from all the suspension components here. Came up behind the radiator area and went straight up to the top engine compartment. Pulled to the top here and left a generous service loop here of wires, in case you ever add a supplemental braking system to the unit. Some of those actually require the left-in turn signals to work, so have a big loop here to make it easier to work on in the future.Then I ran it underneath of the intake right here. There's this plastic piece with two plastic rivets that hold it in place. Just snuck it below, underneath of it, down behind the grill, til it met the wire harness again, then brought it out towards the position of our base plate for our wire harness.On the side right here, I used provided self-tapping screw and a quarter-inch nut driver to attach the ground wire to the frame in this area right here.You notice I have my bumper cover off. When I did the wiring, it's always good idea to do your base plate, or attach the points, first, and while you have your bumper cover off, go ahead and run your wires.Once you have everything back together, it's a good idea to go ahead and test out your lights. Hook it up to a vehicle with a 4-pole flat, and we'll try it out. First off, we'll try our running light circuit, then our left turn signal, then our right turn signal. Our turn signal works. We definitely have our brake lights working.We have a wire end right here. You may want to replace this, or if you want to use included bracket, I'll just give you a quick overview on how that works. Basically, you have this 4-pole cover that goes over it. It just kind of slips over to a groove that's built into the 4-pole, and then your bracket is designed to fit around it with the 4-pole cover. It clamps over it. Then you attach it to your vehicle.When you install this, you can mount it up like this, or maybe on the bottom, personal preference. This bracket'll work great for a vehicle where you're only using just the lighting circuits right here.That'll finish it for Hopkins Custom Tail Light Wiring Kit for Towed Vehicles, Part number HM56207, on this 2011 Jeep Grand Cherokee.

Customer Reviews

Hopkins Custom Tail Light Wiring Kit for Towed Vehicles - HM56207

Average Customer Rating:  4.3 out of 5 stars   (4 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.

- HM56207
2008 Jeep Grand Cherokee

I purchased this wiring for my 08 Jeep Grand Cherokee, to flat tow behind my motor home. It works exactly as advertised, and for the most part it was easy to install. My only complaint is that the wires that run from the left tail light to the right side were way too short. I had to add about 3 ft of wire to make it work. But once that was complete it was a pretty simple installation. It's very clean! I mounted the plug under the bumper and behind the license plate so it's completely unnoticeable. Then I purchased a 6 ft extension to go from the plug to the motor home. I would recommend this kit for it's simplicity. And it uses all factory style connectors, so you don't have to cut any of the factory wiring in the vehicle. 425945

- HM56207
2008 Jeep Grand Cherokee

Product works well. Only down side is attachment of the plug to vehicle. There could be a better way to mount it. 412305

- HM56207
Jeep Grand Cherokee

i have been towing my jeep gc flawlessly 4 1 yr thxs etrailer 337060

- HM56207
2008 Jeep Grand Cherokee

This company is truly the best! Besides having the products I need, available, they have knowledgeable people that can answer my questions. I've kept ordering from them. 280408


Ask the Experts about this Hopkins Tow Bar Wiring

  • Is Hopkins Wiring Kit # HM56207 the Correct Lighting Kit when Flat Towing 2008 Jeep Grand Cherokee
    Yes, the Hopkins Custom Tail Light Wiring Kit, part # HM56207 is the correct tow bar wiring to flat tow your 2008 Jeep Grand Cherokee. This kit lets you wire your Jeep to accept your RV's tail, brake, and turn signal lights for flat towing while providing a 4-way flat plug at the front of the towed car to connect to your motor home. It plugs in quickly and easily so no cutting or splicing of wires are required. If using a supplemental brake system a brake light relay like part # RM-88400...
    view full answer...
  • Recommended Tow Bar Wiring For 2007 Jeep Grand Cherokee
    I called my contact at Hopkins and asked about your 2007 Jeep Grand Cherokee. They told me that you can look on the door jamb of your Jeep for a sticker that should have the manufacture date. If your Jeep was built from January to mid June then it is the early year model and the correct harness is part # HM56206. If you find that it was built after mid-year then the right harness is part # HM56207. If using a supplemental brake system a brake light relay like part # RM-88400 is required. Another...
    view full answer...
  • What do I Need to flat Tow a 2011 to 2013 Jeep Grand Cherokee Behind a Motorhome
    To flat tow a 2011 to 2013 Jeep Grand Cherokee there are 5 major components needed: base plates, tow bar, safety cables, lighting, and supplemental braking. The base plates are what attach to the front of the Jeep and provide a safe and proper attachment point for the tow bar. For the 2011 to 2013 Grand Cherokee I recommend Roadmaster EZ5 base plates # RM-521440-5. These base plates feature removable arms that, when removed, makes the base plates almost invisible. I have linked a video...
    view full answer...
  • Best Flat Towing Setup Recommendation for a 2007 Jeep Grand Cherokee
    First let's start with a base plate kit. For that I would recommend the Roadmaster Base Plate # 1427-1. This is the most popular option we have for your vehicle and I attached an install video for you to check out as well. In addition to the base plates, you will also need a compatible tow bar, safety cables, lighting, and supplemental braking to flat tow your vehicle. The most popular compatible tow bar is the Falcon 2, # RM-520. For safety cables you can use # RM-643. The coiled...
    view full answer...

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Info for this part was:

Test Fit:
Joe V
Test Fit:
Robert C
Edited by:
Leah B
Written by:
Lindsey S
Video Edited:
Joshua S
Video Edited:
Jacob T
Video by:
Chris R
Video by:
Jonathan Y
Updated by:
Sarah W
Updated by:
Alexander C
Updated by:
Jenny M

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