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Hopkins Custom Tail Light Wiring Kit for Towed Vehicles

Hopkins Custom Tail Light Wiring Kit for Towed Vehicles

Item # HM56203

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Tow Bar Wiring

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HM56203 - Tail Light Mount Hopkins Tow Bar Wiring
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  • 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. Wires as combined lighting system. Lowest Prices for the best tow bar wiring from Hopkins. Hopkins Custom Tail Light Wiring Kit for Towed Vehicles part number HM56203 can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (24)
  • Q & A (20)
  • Videos (2)
  • Photos
  • Why etrailer?

Hopkins Tow Bar Wiring - HM56203

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. Wires as combined lighting system.


Features:

  • Lets you wire your vehicle to accept your RV's tail, brake, and turn signal lights for flat towing
    • Wires towed car as combined system so that brake and turn signals travel along same wire
    • 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.


Changing from a Separate to a Combined Lighting System

Your vehicle ordinarily operates on a 3-wire system, wherein the brake signal and the turn signals travel along different wires to illuminate different lights. (Typically, this means that your vehicle will have amber turn signals.) This is referred to as a "separate lighting system." When you hook up for flat towing using this harness, however, your towed car's lighting system will operate in a combined fashion. This means that the brake and turn signals sent by your RV to your towed car will be carried on a single wire. As a result, your car's brake lights will do the flashing for the turn signals. Your vehicle will still function as designed - with separate lighting - when not hooked up to your RV.


Do You Need a Brake Light Relay?

Because this harness wires your vehicle as a combined system, 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.



11156203 Hopkins Plug-In Simple Dinghy Towing Harness

Replaces 56203





This Product Fits The Following Vehicles

2002 - 2007 Jeep Liberty



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 Tow Bar Wiring - Plugs into Vehicle Wiring - HM56203 Review

Today, we're going to be taking a look at Part Number HM56203. This is the Hopkins Custom Taillight Wiring Kit for Towed Vehicles. This product is going to fit your 2002-2007 Jeep Liberty. It's going to let you wire your vehicle to accept your RV's tail, brake, and turn signal lights for flat towing. It's going to wire the Towed Car as a combined system so that the brake and turn signals travel along the same wire. This unit is going to provide your four-way flat plug at the front of the vehicle, that way you can easily get it connected to your motor home.

The benefit of this system is that it's going to connect quickly and easily. You don't have to worry about cutting or splicing any of your wires. It's a custom fit vehicle wiring harness. The connection points are going to be located behind your vehicle's tail lights. Locate your connection points. You're going to have two sets of connectors so you can plug those in.

The plugs are going to match up perfectly with the plugs on the vehicle. They're going to snap lock together. We're going to have locking tabs, which are going to offer a nice, tight, secure fit. Once you have those connected, you're going to need to mount your black box right here. This is a weatherproof box.

It's going to keep the built-in diodes protected, which is going to prevent electrical feedback. Those diodes are going to prevent electrical feedback to safeguard the towed vehicle's electrical system. You don't have to worry about the system interfering with the electrical system when the towed car is not hooked up to an RV. After you get the connections made and you get them plugged in, you want to mount that black box using a zip tie or two. Then, you can secure any excess or slack in your wiring using all of the other zip ties. The four-way plug is going to run all the way up to the front of the vehicle.

It does come with a mounting bracket and the necessary hardware to get that installed. That way the plug and connection points are always easily accessible at the front of the vehicle. It's going to come with a dust cap that goes over the four-way connector. It just protects those connection points when you don't have anything connected to it. Again, this is custom designed for your vehicle. It's a really nice design. You will need to make a ground connection at the front of your vehicle. That's simply the white wire with a ring terminal attached to it. It's going to come with a self-tightening screw to make that connection, and it's going to come with some terminal grease. It is recommended that you use the provided terminal grease on all of your electrical connections, like the plugs on the vehicle and the four-pole connector itself. That's going to help prevent corrosion. What this doesn't come with is that it does not include an extension loop. Extension loops are what connects the towed vehicle to the RV. That is sold separately. We do have them here at etrailer.com, so if you need one you can pick one up. The other thing that might be needed that's going to be sold separately is a brake relay. That might be required if you use this system with a supplemental braking system. That part number is sold separately, Part Number RM-88400. Again, that may be required if you use the supplemental braking system. That's going to do it for today's look at Part Number HM56203. This is your Hopkins Custom Taillight Wiring Kit for Towed Vehicles, and again this is going to fit your 2002-2007 Jeep Liberty.


Customer Reviews

Hopkins Custom Tail Light Wiring Kit for Towed Vehicles - HM56203

Average Customer Rating:  4.9 out of 5 stars   (24 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. Wires as combined lighting system.

- HM56203
by:

I very satisfied with custom light kit, no need to splice wires just hook up and plug in. Customer service was top notch, everyone there knows their products and make sure of the right product u need. I ordered the wrong my mistake and got what i needed the next day. THANKS, CARMEL D. 323796



- HM56203
by:

Wish the flat 4 connector on the front was a rooms connector but other then that it’s a great product with no wire cutting needed. 611179



- HM56203
by:
2005 Jeep Liberty

product worked as advertised. However on my 2005 jeep liberty the turn signal is a separate yellow light below the Break / tail light. it would be Nice if the harness used the same lights. But it works fine like it is. 608549



- HM56203
by:
2003 Jeep Liberty

I have a 2003 Jeep Liberty that I pull behind a 38' RV...This was an easy install, would have been super easy if I had a lift...crawling under the vehicle to secure the wiring was the only painful experience. Directions and videos were very helpful. I cut the 4 way plug off and wired it for a 7 to 6 pin coiled cable. 553332



- HM56203
by:
2004 Jeep Liberty

This is the second kit I have ordered for a customer at my shop now. The quality is beyond excellent and installation is easy. Amazing value. Works awesome. 513837



- HM56203
by:

Great product. Was a perfect fit. Best price and arrived on time. 462764



- HM56203
by:
Jeep Liberty

Installation was a breeze and after a year of pulling my Jeep Liberty behind our rv, I'm still very pleased with the harness. It sure beats breaking into the existing factory wiring on your vehicle! The fact that you can just plug the light sockets and bulbs into a spare hole in the existing tail lights means there is virtually no modifications necessary. 453523



- HM56203
by:
Jeep Liberty

The kit connected my Jeep Liberty to my RV for a trip through the Black Hills and Yellowstone. Excellent. 444213



- HM56203
by:
2007 Jeep Liberty

Wow I'm so happy that I ordered this harness from etrailer. We had just purchased an 07 liberty and had a trip planned but needed lights before we could travel, after just about three days the kit arrived. Only took about 90 minutes to install I suggest watching their you tube video. The next day we were on the road. Thanks etrailer for the fast shipping. Mike. M. 434998



- HM56203
by:

It was easy to install and works great. 417408



- HM56203
by:
2005 Jeep Liberty

Fit as advertised, instructions were straight forward. Shipping was fast. 390254


Comments

Thanks Jim for reviewing the Wiring Kit!! Hopkins appreciates your business.

Hopkins C from - 06/13/2017

24972

- HM56203
by:
2007 Jeep Liberty

This harness provided exactly what I needed and I installed it on my Jeep Liberty and towed this vehicle across the United States without any problems. Thanks for the quick service. I would recommend this product and etrailer. Thanks 387793


Comments

That what we love to hear Jerry S!!! Hopkins appreciates your business and we are grateful you purchased our Wiring Kit. If you have any concerns or questions, please get in contact with etrailer customer service. Thank you!

Hopkins C from - 06/05/2017

24630

- HM56203
by:

GREAT product. I would recommend using this kit to anyone. Great service from your company. I received my kit on time. Very easy install. 362341



- HM56203
by:
2005 Jeep Liberty

This was a excellent product and I received excellent service thanks 360367



- HM56203
by:

Worked great. No picture as it is internal to the car 360133



- HM56203
by:

all items received undamaged and ahead of promised date.staff were very helpful and knowledgeable about products. Would recommend to anyone needing towing equipment and or electronics needed for towing any vehicle or trailer. 346376



- HM56203
by:
Jeep Liberty

You have great service and pricing. Thank You 340954



- HM56203
by:

Great item. Very easy to install and high quality components. 332437



- HM56203
by:
2006 Jeep Liberty

Wiring was exactly what I wanted. Fit right and instruction were easy 313511



- HM56203
by:

excellent product perfect fit 289942



- HM56203
by:

the hitch and wiring worked great 287975


Comments

The product is still working great after a year and a lot of miles.

Alvin K - 08/27/2017

27656

- hm56203
by:
Jeep

Base plate bx1119 and wiring kit hm56203 both were very easy to install , just follow the easy directions .I'm 73 and it only took me 4 hours to completely install both. I did it with the jeep sitting flat on garage floor. 269904


Comments

Hi very good lots better than using magnetic mount tow lights

Ross J - 07/07/2017

25734

- HM56203
by:
2007 Jeep Liberty

Easy install 183754



- HM56203
by:

great service, all parts were present, all products fit and the sales rep was a big help in selecting the right products. 173451


24
24

Ask the Experts about this Hopkins Tow Bar Wiring
Do you have a question about this Tow Bar Wiring?


  • Parts Needed to Flat Tow 2002-2004 Jeep Liberty
  • We have everything you'll need to flat tow a 2002 through 2004 Jeep Liberty. But the first thing you need to determine is if you will buy one with a brush guard or without. If there isn't a brush guard you'd want the base plate kit part # RM-521423-5 with the Roadmaster Nighthawk part # RM-676. Or if you go with a brush guard you'd want the base plate kit part # 521426-1 with the Sterling tow bar part # RM-576. To protect either tow bar when not in use the cover part # RM-055-3 is recommended...
    view full answer...

  • Tow Bar Wiring Recommendation for a 2007 Jeep Liberty
  • For your 2007 Jeep Liberty the tow bar wiring harness is the # HM56203, the # HM56204 is for the newer generation Liberty that starts in 2008. To determine if you would also need the brake light relay part # RM-88400 (price at link below) you will need to answer the following questions: Are you using a supplemental braking system that depresses the brake pedal in your towed car? No - You do not need a brake light relay. Yes - You may need a brake light relay. Continue on to...
    view full answer...

  • Base Plate for 2004 Jeep Liberty Thats Compatible with Reese Tow Bar
  • As long as your Liberty doesn't have a brush guard on it, the Roadmaster # RM-521423-5 base plate kit would be a good choice. If you DO have a brush guard, use # 521426-1. In order to be compatible with your Reese tow bar, you'd also need an adapter like part # RM-025. I'm not sure which Reese tow bar you have, but keep in mind that some of the Reese towbars have a limited speed rating of 45 mph. The # 40602 bracket you referenced is more suited to something that would have a completely...
    view full answer...

  • Troubleshooting Flat-Towing Wiring Harness HM56203 for 2005 Jeep Liberty
  • First, make sure that all connectors for Hopkins 4-pole wiring harness # HM56203 are fully-seated together at the Liberty's tail lights and that the locking clips are engaged. Next, check the white ground wire to be certain it is tightly affixed to a clean bare metal spot on the car's metalwork. Sand off primer/paint and/or clean off any other material or contaminants that might prevent metal-to-metal contact. This ground wire is most often the cause for lighting issues like yours. You...
    view full answer...

  • Availability of Plug and Play Flat Towing Wiring Harness/Flat Towing Equipment for 2004 Jeep Liberty
  • I believe TowDaddy was purchased by Hopkins a couple few years ago. Hopkins offer a plug and play flat towing wiring harness, part # HM56203. If you click the provided link, you can see an installation video showing the harness being installed on a 2006 Jeep Liberty. To fully equip your Liberty, you'll need base plates, a tow bar, safety cables, the wiring solution you've asked about, a supplemental braking system and perhaps a high/low adapter to level the tow bar. For base plates,...
    view full answer...

  • Recommended Parts to Flat-Tow a 2005 Jeep Liberty
  • In order to flat-tow your 2005 Jeep Liberty with all four wheels on the ground you will need a base plate kit, tow bar, flat-tow wiring harness, safety cables, supplemental braking system, and possibly a high-low adapter. I have attached my recommendations for each of these parts below with ease of use in mind. For a base plate kit I recommend the Blue Ox Base Plate Kit part # BX1122 as it has removable arms which makes for a clean look while not in tow. The towbar I recommend to use...
    view full answer...

  • Best Flat Towing Setup Recommendation for 2015 Jeep Grand Cherokee with Adaptive Cruise Control
  • Both the Roadmaster and Blue Ox flat towing setups are excellent choices that would work well on your 2015 Jeep Grand Cherokee. In my personal experience with both systems I prefer the Blue Ox setups. Our installers feel the same way. The removable portions of the base plate kits are a bit easier to take off, and the tow bars seem to operate smoother. For a tow bar I would highly recommend the Blue Ox Avail part # BX7420. This tow bar is the easiest to connect and disconnect on level...
    view full answer...

  • Tow Bar Wiring to Flat Tow a 2004 Jeep Liberty Behind a Motor Home
  • We have several tow bar wiring harnesses that you could use on your 2004 Jeep Liberty. For a harness that plugs in line with the vehicle tail light wiring you could use Hopkins # HM56203. If you want something that is going to bypass the vehicle wiring completely you can use bulb and socket kit # RM-155 or a magnetic kit such as # C-ATL20A. And for a kit that hardwires into the vehicle tail light wiring you can use diode kit # 154-792-118158. I have linked some videos for you to view....
    view full answer...

  • Can Trailer Wiring and Towed Vehicle Wiring be Installed Together on a 2002 Jeep Liberty
  • Yes, the trailer wiring harness, part # 118524, and the towed vehicle wiring kit, part # HM56203, can be used together. They both plug in behind the tail lights and plug into each other. We've actually installed harnesses in this same fashion here. This way you'll have a 4-way at the Jeep's rear to tow a trailer and a 4-way on the front of the Jeep to tow it behind a motorhome.
    view full answer...

  • How to Flat Tow 2005 Jeep Liberty 4WD
  • I took a look at the online version of the owner's manual for your 2005 Jeep Liberty and for the 4WD model it lists the following procedure for shifting the transfer case to N (Neutral) so that it can be flat towed with all 4 wheels on the ground: 1. Depress brake pedal, 2. Shift transmission into N (Neutral). 3. Shift transfer case lever into N (Neutral). 4. Start engine. 5. Shift automatic transmission into D (Drive) or manual transmission into any forward gear. 6. Release...
    view full answer...

  • Can EZ5 Base Plates Be Used With Roadmaster Stowmaster Tow Bar On 2005 Jeep Liberty
  • The base plates that are designed to fit your 2005 Liberty and work with your Stowmaster tow bar are part # RM-521423-4. These are the EZ4 base plates, and have removable arms so it gives your Jeep a nice clean look when they are removed. The EZ5 base plates, part # RM-521423-5, will not work with any tow bars that use a hitch ball and are designed to work with tow bars that slide into a trailer hitch. For tow bar lighting I recommend the Hopkins Custom Wiring, part # HM56203....
    view full answer...

  • Parts Needed to Flat Tow 2005-2007 Jeep Liberty Behind RV
  • In order to flat tow your Jeep Liberty behind an RV/motorhome, you need a base plate kit, a tow bar, safety cables, a lighting solution, a supplemental braking system, and likely a high-low adapter. Starting with the base plate kit, I recommend the Roadmaster EZ5 Base Plate Kit # RM-521423-5. These base plates are custom fit for your Jeep and feature a hidden bracket design for a clean look when you aren't towing. Its black powder coat finish is durable and will work do a nice job of...
    view full answer...

  • Tow Bar and Accessories for Flat Towing 2006 Jeep Liberty
  • The Tow Ready # 63180 tow bar you referenced could be used on a 2006 Liberty, but you would be limited to towing at a maximum of 45 mph. In order to be able to tow at normal highway speeds, you would need a standard tow bar like the Blue Ox Alpha, part # BX7365. The tow bar includes the necessary safety cables, but you will also need a base plate kit like the Blue Ox # BX1122 to provide an attachment point on the vehicle for the tow bar, a lighting solution like the Hopkins # HM56203...
    view full answer...

  • Recommended Dinghy Towing System for 2006 Jeep Liberty
  • I'm happy to assist with recommendations for your 2006 Jeep Liberty for flat towing. Your Roadmaster tow bar will work just fine with the Roadmaster Crossbar-Style Base Plate Kit # RM-521423-4 and Loctite # LT37420. Then you will also need the safety cable # RM-643. Then for your tow bar wiring, I recommend the Hopkins Custom Tail Light Wiring Kit for Towed Vehicles # HM56203 along with the Hopkins Nite-Glow Tow Bar Extension Cord w/ Socket - Coiled - 7-Way RV to 6-Way Round - 8' Long...
    view full answer...

  • Blue Ox Base Plate Kit and Tow Bar Wiring Recommendation for a 2007 Jeep Liberty
  • The correct Blue Ox base plate kit for your 2007 Jeep Liberty is the part # BX1122. Sounds like you already have a tow bar and all you need is wiring. Which for that I would recommend the Hopkins Tow Bar Wiring Kit part # HM56203. This will plug in line with your Liberty's taillight wiring harness and will allow your motorhome to activate the taillights.
    view full answer...

  • Compatibility of Blue Ox Adventurer Tow Bar With # BX1122 Base Plate Kit for 2005 Jeep Liberty
  • The Blue Ox Adventurer tow bar, part # BX7322 has arms that can adjust so they'll fit base plate brackets that are between 16-34 inches apart. Since the # BX1122 base plate brackets are 20 inches apart, they are compatible and would work just fine. Just be aware that the Adventurer is rated for 5000 lbs. Some models of the Jeep Liberty can weigh above 4000 lbs, so you'll need to be careful about the weight of any gear you carry in the Liberty, if any. To complete your set-up, you'll...
    view full answer...

  • Wiring Needed to Flat Tow and Tow a Trailer with a 2004 Jeep Liberty
  • Even though the wiring looks the same for flat towing and trailer towing with a 2004 Jeep Liberty, you actually will need to use different wiring harnesses. If you don't already have wiring on your Liberty for towing a trailer then I recommend going with the Tekonsha T-One # 118524. This comes with connectors that T into the wiring on your tail lights and wiring that you run up to your battery to power your trailer lights. This gives you a 4-Way connector to activate the standard light...
    view full answer...

  • Recommended Complete Flat Tow Set-Up For 2004 Jeep Liberty
  • To flat tow your 2004 Jeep Liberty, I recommend starting with the Roadmaster EZ5 Base Plate Kit - Removable Arms # RM-521423-5. To install these base plates I suggest using Loctite Threadlocker # LT37420. For a tow bar, I recommend the Roadmaster Falcon 2 Tow Bar - Motor Home Mount - 2" Hitch - 6,000 lbs # RM-520. I recommend using a hitch lock like # 40107 to secure your investment. You will also need safety cables like # RM-643. For your vehicle wiring, I recommend the Hopkins...
    view full answer...

  • Tow Bar Wiring for a 2004 Jeep Liberty
  • There are special wiring harnesses used when flat towing a vehicle. The easiest way to integrate a 7-Way would be to use Blue Ox bulb and socket kit # BX8869. Then you could hardwire the included wiring to the 6-Way included with extension # RM-146-7. If you don't have to have a 7-Way at the front of the toad it would be a little easier. You could use Hopkins harness # HM56203 which just plugs in line with the vehicle tail light wiring. Then you could just use a 7- to 4-Way adapter on...
    view full answer...

  • Custom Flat Towing Wiring Harness for a 2007 Jeep Liberty
  • Yes, there is a custom flat towing wiring harness available for your 2007 Jeep Liberty. It is # HM56203. If you are also using a supplemental braking system when flat towing the Jeep, which is required in most states, you will also need to use a brake light relay, # RM-88400. The Even Brake system, # RM-9400, includes the relay. I have included a couple of helpful links to our articles on flat towing for you.
    view full answer...


Do you have a question about this Tow Bar Wiring?




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Info for this part was:

Edited by:
Leah B
Written by:
Lindsey S
Expert Research:
Adam R
Photos by:
Jim W
Installed by:
Cole B
Updated by:
Sarah W
Updated by:
Alexander C

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