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  1. Tow Bar Wiring
  2. Roadmaster
  3. Removable Tail Light Kit
  4. Bypasses Vehicle Wiring
  5. Magnetic Mount
  6. Universal
Roadmaster Standard Magnetic Tow Lights

Roadmaster Standard Magnetic Tow Lights

Item # RM-2120
Our Price: $68.29
You Save: 43%
Tow Bar Wiring

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Shipping Weight: 4 lbs
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Avoid tapping into your towed vehicle's electrical system by using these self-contained tow lights. Heavy-duty magnets keep lights securely in place on your towed car. Great Prices for the best tow bar wiring from Roadmaster. Roadmaster Standard Magnetic Tow Lights part number RM-2120 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (32)
  • Q & A (0)
  • Photos

Roadmaster Tow Bar Wiring - RM-2120

  • Removable Tail Light Kit
  • Bypasses Vehicle Wiring
  • Magnetic Mount
  • Universal
  • Roadmaster
  • 20 Foot Long Harness

Avoid tapping into your towed vehicle's electrical system by using these self-contained tow lights. Heavy-duty magnets keep lights securely in place on your towed car.


  • Allows you to legally tow your car without having to tap into its wiring
  • Eliminates risk of electrical damage to towed car
  • Attaches securely with magnets
  • Connects directly to motor home wiring, bypassing towed vehicle completely
  • Has heavy-duty vinyl casing for superior protection of wiring
  • Meets Department of Transportation standards
  • Fits all vehicles
  • Includes 2 lights and wiring harness with 4-pole flat trailer connector
  • Length of wire:
    • Wire that connects the lights: 53-1/2"
    • Wire that extends out the back of the light: 243"
    • Wire with 4-pole connector: 35-1/2"
  • Limited Lifetime Warranty

The law requires that all towed cars have functional signal and brake lights in sync with the RV towing them. Most wiring kits require you to splice into your vehicle's electrical system, but doing this can void your manufacturer's warranty. Magnetic tow lights avoid this problem by having the wiring run underneath your car and plug into your power source.

2120 RoadMaster Standard Magnetic Tow Lights

Installation Details RM-2120 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

Roadmaster Standard Magnetic Tow Lights - RM-2120

Average Customer Rating:  4.8 out of 5 stars   (32 Customer Reviews)

Avoid tapping into your towed vehicle's electrical system by using these self-contained tow lights. Heavy-duty magnets keep lights securely in place on your towed car.


They were shipped fast and arrived quickly. These are quality lights with very strong magnets. I installed them on my Jeep in no time after making some steel brackets for the tubular aluminum bumper. Would be nice to have 5 or 6 magnetic clips to place along the wire to secure it to the vehicle. I highly recommend these lights.

2005 Subaru Forester

I like these lights, nice strong magets hold them securely to car roof. I use them because my bikes in bags cover my tail lights. I added LED bulbs because when I tow the car with my RV these additional lights put to much load causing voltage drop and dim lights.

Jay C.


These lights are still working well only improvement I could suggest is if they could somehow maybe put up plastic layer between the magnets and the roof because they’re taking paint off, if they could still make the magnet is strong.

Jeep Wrangler

I purchased the Curt Tow Bar with Adjustable-Width Arms - Car Mount - 2" Ball - 5,000 lbs. initially I was Leary of the product because of its low price compared to other tow bars. I now can say my concerns were needless because after flat towing my Wrangler over 5,000 trouble-free miles I have nothing negative but only positives to report. The best thing I like about the tow At is that it only takes 5 minutes to attach and unhook.


Good light set. Works perfectly and has held up well.

2010 Chevrolet Silverado

Everything was delivered on time and worked perfectly. This solved my concerns about towing my car with my RV with a car dolly.


I did a mock-up set-up and this kit works as advertised.
Magnetic bases are strong, it should fit my needs perfectly.


Fast delivery. Did a test as soon as I received the light kit. Flawless. Magnets very strong but safe for car finish.


lights look fine....

easy hitch
is far better than I expected....very nice. I should have gotten this sooner!!!


Works as intended. No issues.


Heavy duty magnets gave me the security of knowing they wouldn’t come off. Very easy to install!

2015 Mercedes-Benz Sprinter

works great, easy application


Very simple product. Exactly what I wanted. I need to do something more permanent but this worked for our trip. The most important thing was I needed it fast and I got it in time.
Friendly and informative people on the phone were knowledgeable and new their product. I will shop here again.


I looked everywhere for these lights. Lots of cheep ones out there for 2-2X $$ but these are the real deal and a great price. Shipment was early and response was great. Thank you for the quality product.


These are the products that we needed and you were able to provide them.

2011 Mazda MX-5 Miata

Very strong magnets and plenty of length on the cord for a car in tow.



2010 Mini Cooper

Everything delivered even faster than expected - Thank you.


Works great!!




Have not hooked up yet. But ordering and delivery are great




2018 Jayco Greyhawk Motorhome

Just what I wanted


Show More Reviews

See what our Experts say about this Roadmaster Tow Bar Wiring

  • Can Magnetic Light Kit # RM-2120 Wiring Be Attached Directly to the 7-Way Connector of a Tow Dolly
    You could potentially install the magnetic light kit # RM-2120 in the manner you have described. However, you would need to make sure the magnetic lights wiring is connected on the tow dolly side connector for easy installation and removal. Adding more wires to the 7-Way can increase the chances of a short circuit and there may not even be room depending on the gauge of wire used on the tow dolly. If there is no room or it looks like the wires for adjacent circuits could touch, I recommend...
    view full answer...
  • What Type of 4-Way Connector is Attached to the RoadMaster Standard Magnetic Tow Light # RM-2120
    The 4-way that attaches to the RoadMaster Standard Magnetic Tow Lights # RM-2120 is a female connector. It also comes with an extension piece that has a male end as well that does have a protective cover.
    view full answer...
  • Can A Magnetic Light Kit be Used at the Same Time as a Tow Dolly Light Kit
    As long as the power draw from the lights on the tow dolly and the magnetic lights does not exceed the amperage rating of the tow package wiring on the RV then you can just tap the magnetic kit into the tow dolly wiring harness. What I recommend is to tap into the tow bar wiring using the short wiring harness in # RM-2120 that you referenced. That way when it is not needed you can just put the cap on it and secure it to the tow dolly or RV. But you must make sure that the combined power...
    view full answer...
  • Recommended Tow Bar Wiring for 2005 Toyota Rav4
    There is no custom tow bar wiring harness for your 2005 Toyota RAV4, however I do have a solution for you. For lighting you can use the Magnetic Towing Light Kit, part # RM-2120. This kit offers easy hook up and removal with the non-scratch magnetic base. A 20 foot cord is included.
    view full answer...
  • Tow Bar Wiring Recommendation for a 1998 Jeep Cherokee
    I have a few tow bar wiring options for you to check out. For a simple magnetic wiring kit such as # RM-2120 Or a bulb and socket kit like part # RM-155 that the bulb will install in the taillight housing. I attached a help article on how to pick out tow bar wiring for you to check out as well.
    view full answer...
  • How to Install the Roadmaster Even Brake 2nd Vehicle Kit # RM-98400
    To use the Roadmaster Even Brake Braking System, # RM-9400, in your 2011 HHR, you will simply install the braking system using the installation instructions that came with the Even Brake system. The only difference in the installation is that you will use the 2nd Vehicle Kit, # RM-98400, instead of the parts that were included with the Even Brake system. The first step to install this kit is to find a suitable location for the breakaway switch and the ICX transmitter. The breakaway switch...
    view full answer...
  • Wiring 2010 Toyota Corolla for Dolly Towing Behind RV
    Usually, a tow dolly will have its own taillight set-up, and the vehicle wouldn't require its own lights be used. Although not needed, if you want additional lighting, a magnetic mount kit like part # RM-2120 would be easiest to use. You could tap the included 4-pole vehicle side into the taillight circuits of the dolly, and plug the magnetic mount lamps in when needed. I've linked to to some help articles you might find helpful.
    view full answer...
  • Will the Roadmaster Tail Light Wiring Kit With Bulbs Fit in a 2012 Chevy Sonic Tail Light Housing
    The Roadmaster the Tail Light Wiring Kit with Bulbs, # RM-155, is a universal wiring kit and will work on your 2012 Chevrolet Sonic. We have not had a chance to install this kit in a Sonic yet, but I can give you some measurements to help you determine if you would like to install this kit. The bulbs used in this kit are the standard # 1157 bulb which measures 1.83 inches tall and .97 inches wide. The socket that goes into the lens measures .95 inches. The instructions show to drill a...
    view full answer...
  • Can the Roadmaster Invisibrake be Used with Magnetic Lights on a 1997 Jeep Wrangler
    You can use the Invisibrake, # RM-8700, with a magnetic lighting system by splicing into the 4 wires on the magnetic lighting system. The only difference from the instructions is that the magnetic light ground has to grounded to the Jeep chassis rather than through the 4-Way connector. The brake switch is located above the brake pedal. On a 1997 Jeep Wrangler the wire you need on the brake switch is a white/tan wire. The easiest way to get to it is the direct approach. You may have to...
    view full answer...
  • Recommended Wiring Solution for Flat Towing 2020 Jeep Wrangler Unlimited
    There is an available EZ mount lamp system that you could close in the tailgate of your Wrangler Unlimited, part # EZT20B. This is basically the same setup as a magnetic mount, without the magnets. This is the kind of system that many folks start out with, because they like the simplicity of operation and how easy it is to install. However, many find they don't like the cords flapping in the wind or the time it takes to thread the wiring through the interior of the vehicle each time they...
    view full answer...
  • Can Brake Light Relay RM-88400 Be Installed on a 2018 Jeep JL Wrangler Unlimited
    The problem with the 2018 Jeep JL Wranglers is that the circuit you need to install the brake light relay # RM-88400 is inaccessible but it isn't required on this vehicle. When your JL Wrangler is set up in flat tow mode (see owner's manual) the brake light circuit is not active. That is why we do not list it for that particular vehicle. When in flat tow mode it will work fine. Or you can avoid all together by going with magnetic light kit # RM-2120. If your braking system has a monitor...
    view full answer...
  • Recommend Wiring Kit to Flat-Tow 2007 Jeep Wrangler Unlimited
    For lighting, there are a few options, you could use the Magnetic Towing Light Kit, part # RM-2120, which would be good if you do not tow often. These lights attach to your vehicle by magnets. If you plan to tow your Jeep often, I would recommend the item you selected, Roadmaster Universal Hy-Power Diode Wiring Kit, part # RM-154, which is a more permanent solution. From the information I found, your Jeep should have a combined tail and turn signal (see FAQ install). I have linked a video...
    view full answer...
  • Wiring Diagrams for 4-Diode Flat Towing Tow Bar Wiring Kit RM-154
    I believe you are talking about the diagrams that are lower on the product page, below the description and specs, for # RM-154. There are 4 of these diagrams. I have included a picture that shows them all for you. Please note that the diode kit is not recommended if your 2015 Ford Edge has LED tail lights. I have included a link to a video showing an example installation for you. If your Edge has LED lights I recommend Roadmaster # RM-2120 which will bypass the factory wiring so you won't...
    view full answer...
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  • Recommended Wiring Harness to Flat Tow 2015 Jeep Wrangler Unlimited
    Part # RM-155 is not confirmed as a fit for the 2015 Jeep Wrangler Unlimited so you would not want to use it. If you do not want to splice into the vehicle wiring, I recommend using Hopkins Tail Light Wiring Kit part # HM56200. The only other way to bypass the vehicle completely is to use a magnetic kit such as # RM-2120.
    view full answer...
  • Recommendation on Wiring a 2015 Ford F-150 for Flat Towing
    On your 2015 Ford F-150, we have a couple options for you to choose when wiring your vehicle up for flat towing. The first option and most labor intensive would be to use the Roadmaster 7-Wire to 4-wire Flexo-Coil Kit # RM-15247. This kit includes the diodes and wire that will allow you to hard wire into your Ford's lighting wiring harness. You then would run the wiring to the front of the truck and install the 4- wire round plug. The 7-way to 4-way Flexo-Coil will connect your motor...
    view full answer...
  • Lighting Solution for Flat Towing a 2010 Volkswagen Passat Behind a Motor Home
    Your assumptions are correct, the Tekonsha wiring harness, # 118562, is designed for it you were to need to power trailer lights while towing with the 2010 Volkswagen Passat. It cannot be used to power the vehicle lights while it is being towed. What you can use is a magnetic kit like # RM-2120. This light kit will mount to any flat metal surface on the vehicle, like the trunk lid, and it connects to a 4-Way on the towing vehicle. The benefit is that you do not have to cut into the vehicle...
    view full answer...
  • Flat Towing Lights Recommendation for 2016 Jeep Wrangler Since Magnetic Cant be Used
    The removable lighting solution to use on a 2016 Wrangler is the part # RM-2120 as this will install between the tailgate. The magnetic lights aren't a fit for your vehicle realistically since there isn't a place to attach them. A customer of ours used this kit on his 2015 Wrangler and here is how he said he was able to install the kit. I open the tailgate to first hang the passenger side light then close the tailgate which serves to lock the passenger light in place and allow enough of...
    view full answer...
  • Compatibility of Roadmaster # RM-2120 Magnetic Tow Lights with 2011 Cadillac SRX
    When the # RM-2120 lamps are installed on your vehicle, they will operate completely independently of the lights on the towed vehicle. As long as your RV has a properly installed 4-way trailer connector for the magnetic lamps to plug into, all should work just fine. You mentioned that the RV has a 'separate' lighting system, which would use an amber turn signal bulb or have an amber turn signal lens. A properly installed 4-way will be already converted so the turn signal and brake lamp...
    view full answer...
  • Wiring Harness and Light Kits for Flat Towing With a 2004 GMC Sonoma
    The Magnetic Tow Lights, # RM-2120, plug directly into a 4-Way flat connector on the tow vehicle. If your are towing the 2003 GMC Sonoma behind another vehicle, I would need to know what connector the truck has at the front and what type of connector the towing vehicle has at the back. Then you can get an adapter to match. If you are using the Sonoma to tow another vehicle, I would need to know what it has on the back and what the other vehicle has on the front. There are several different...
    view full answer...
  • How To Install Trailer Lights On A Trailer Without Tail Lights
    The Roadmaster Deluxe Magnetic Tow Lights part # RM-2120 you are referring to are designed to be placed on the rear of the vehicle in a flat tow situation. If you are wanting to tow a trailer with your 2017 Hyundai Tucson, then you will want the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector part # 118501 as this will allow you to hook up your vehicle's tail lights to your trailer tail lights while towing. It is also a plug and play connection therefore you will not need...
    view full answer...
  • Best Magnetic Tow Lights For Flat Towing 2016 Ram 2500
    The best magnetic tow lights for flat towing your 2016 Ram 2500 are an option from Pilot: - Roadmaster Standard Magnetic Tow Lights # RM-2120 I really like the # RM-2120 because they are the easy to install. They have a simple connector that will plug into either a 7-way or 4-way and 20 feet of wire.
    view full answer...
  • Recommended Magnetic Tow Lights That Plug Into 7-Way or 4-Way
    There are absolutely magnetic lights that will allow you to connect to either a 4-way or a 7-way. As you will see in the install video of the Roadmaster Standard Magnetic Tow Lights # RM-2120, you will choose whether you will use this product will a 4-way or a 7 way and purchase the appropriate adapter. After this initial setup, these will simply plug in, run the wire to the back of the tow vehicle and attach them magnetically. Very easy.
    view full answer...
    Image 1 for
  • Parts Needed to Tow a 2002 Jeep Wrangler With a RV
    Yes, everything we sell is brand new from the manufacturer. We do have tow package options available for a RV to tow a 2002 Jeep Wrangler. We would just need to know the type of bumper on your Jeep Wrangler to get you the correct base plates for the a tow bar. Usually the bumper choices are single tube or double tube, or a flat U-channel bumper. We also have a few choices of tow bars available, one being the Roadmaster StowMaster Car-Mounted Tow Bar - 6,000 lbs, # RM-501, it attaches...
    view full answer...
  • What Parts are Needed to Wire a 1995 Saturn SC2 to Tow Behind a 1990 Holiday Rambler Motor Home
    The the 1995 Saturn SC2 does not have amber turn signals in the rear, the brake and turn signals are still separate like amber turn signal vehicles. There are two basic methods for adding lights to a vehicle for towing, non-permanent and permanent. The non-permanent solutions are magnetic or clip-on light kits that temporarily attach to the cars. These are good solutions for folks who like to take different vehicles or do not want the wiring work involved with permanent kits. We carry...
    view full answer...

Do you have a question about this Tow Bar Wiring?

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Lindsey S
Updated by:
Lindsey S
Employee Wilson B
Updated by:
Wilson B
Employee Isabelle B
Updated by:
Isabelle B
Employee Jeff D
Installed by:
Jeff D
Employee Shane H
Installed by:
Shane H
Employee Jacob T
Video Edited:
Jacob T
Employee Michael B
Video by:
Michael B

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