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  1. Flat Tow Wiring Harness
  2. Optronics
  3. Removable Tail Light Kit
  4. Bypasses Vehicle Wiring
  5. 4 Flat
  6. Universal Fit
Universal Magnetic Tow Lights - 20' Wiring Harness with 4-Way Flat Trailer Connector
Optronics

Universal Magnetic Tow Lights - 20' Wiring Harness with 4-Way Flat Trailer Connector

Part Number: TL21RK
In Stock
$61.88
Retail:$79.20
You Save: 22%
Flat Tow Wiring Harness

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Stick these heavy-duty magnetic lights on the back of your car and they'll stay there. Nice and secure, these are also the easiest way to get brake and turn signals on your towed car, trailer, or cargo carrier without doing any hardwiring. 1-800-940-8924 to order Optronics flat tow wiring harness part number TL21RK or order online at etrailer.com. Free expert support on all Optronics products. Great prices and Fastest Shipping for Universal Magnetic Tow Lights - 20' Wiring Harness with 4-Way Flat Trailer Connector. Flat Tow Wiring Harness reviews from real customers.
  • All Info
  • Reviews (203)
  • Q & A (0)
  • Photos

2004 Volkswagen Passat - Universal Magnetic Tow Lights - 20' Wiring Harness with 4-Way Flat Trailer Connector

  • Removable Tail Light Kit
  • Bypasses Vehicle Wiring
  • 4 Flat
  • Optronics
  • Universal Fit

Stick these heavy-duty magnetic lights on the back of your car and they'll stay there. Nice and secure, these are also the easiest way to get brake and turn signals on your towed car, trailer, or cargo carrier without doing any hardwiring.


Features:

  • Gets turn and brake signals on your towed car without having to tap into its wiring
    • Eliminates risk of electrical damage to towed car
    • Makes your tow setup safe and legal without a permanent installation
  • Mounts securely with heavy-duty magnets
  • Includes 2 lights and wiring harness with 4-way flat trailer connector
    • Heavy-duty vinyl protects wiring from the elements
  • Meets DOT standards


Specs:

  • Universal fit for all vehicles
  • Wiring harness length: 20'
  • Wire length between lights: 4-1/2'
  • Separate wire with 4-way for tow vehicle : 3' long
  • Bulb type: 2057 double filament
  • 3-Year limited warranty on housing and wiring only


Will These Magnetic Lights Work On My Vehicle?

These lights are a universal fit for all vehicles - however, is the roof of your car magnetic? Make sure you have a good place to put these lights or they may not be the best fit for you.



TL21RK Optronics Magnetic Mount Stop, Turn, and Tail Towing Light Kit w 20' Wiring Harness

Alternate part number: TL-21RK


California residents: click here


Customer Satisfaction Score:

Ratings & Reviews

4.6

203 reviews
Stick these heavy-duty magnetic lights on the back of your car and they'll stay there. Nice and secure, these are also the easiest way to get brake and turn signals on your towed car, trailer, or cargo carrier without doing any hardwiring.

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great!



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Have not used yet but I think it will be great



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Very good quality,works well, just what I was looking for.



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A high quality product and very easy to use for safely towing.



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Works as advertised!



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excellent, super easy to install and its operation super good. I recommend it 200%



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Great product. easy to install and adj ust



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Come in on the date you said it would. Thank you e trailer



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The quality of the wire used seems very cheap. The the gauge of the wire has to be the thinnest possible. If I had my choice I wouldn't buy another one


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

  • Do You Need to Run a 2021, 2022 or 2023 Chevrolet Equinox at Certain Times When Flat Towing
    Yes, the engine on your Chevrolet Equinox will need to be run at times when flat towing. The easiest way to determine what needs to be done to flat tow your Equinox is to consult your owners manual. I went ahead and took a look at the owners manual for both the 2021 and 2022 Chevrolet Equinox. For either model year, you will need to run the vehicle at the beginning of each day and at each RV fuel stop for about 5 minutes. This will ensure proper lubrication of the transmission components. I...
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  • Solution for Towing 2017 Toyota Prius Behind Motorhome
    You are correct, the 2017 Toyota Prius that you have can only be towed on a dolly behind a motorhome. Good news is it won't put miles on the vehicle since the drive wheels will be on the dolly. I like dolly setups over tow bar setups for a number of reasons. The install time is considerably less, you can easily transfer the towing setup to a different vehicle unlike base plate kits that are vehicle specific, and you don't put miles on the vehicle. The price isn't that different either when...
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  • Recommended Flat Towing Setup for a 2016 Jeep Wrangler Using a ReadyBrute Elite II Tow Bar
    Hey Robert, for your 2016 Jeep Wrangler using the Ready Brute Elite II tow bar you can use the Blue Ox Base Plate Kit # BX1126 with the Blue Ox Base Plate Adapter Brackets for Ready Brute Elite Tow Bars # BX88297. From here, to complete your flat towing setup you'll just need a set of tow bar wiring # TL21RK and you'd be good to go.
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  • Parts Needed to Flat Tow a 2005 Jeep Wrangler with a 2014 Silverado 1500
    If you already have Roadmaster base plates installed on your 2005 Jeep Wrangler then the RoadMaster Base Plate to Blue Ox and Demco Tow Bars Adapter # RM-033 and the Blue Ox Alpha Tow Bar # BX7380 are a great selection. If you don't already have a base plate kit installed then you will need to choose one from the linked selection as they are bumper specific. If you are unsure what you have just send me a photo and I can identify what you have. Since the Blue Ox Alpha comes with safety...
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  • Flat Towing a Diesel GMC Canyon with Air Force One and Battery Disconnect Explained
    Hi Robert, You’re absolutely right to be thinking carefully about this, because getting the braking system and power setup correct is what keeps everything working safely when you’re towing. I was able to confirm from your truck’s owner’s manual that the negative battery cable does need to be disconnected for flat towing, so you’re on the right track there. The good news is that the Air Force One system part # SM99243 will still work properly with the battery disconnected on your truck....
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  • Installing Magnetic Lighting on Towed Jeep To Allow Jeep Lights and Magnetic Light Functions
    The Heavy Duty Magnetic Tow Lights - 20' Wiring Harness with 4-Way Flat Trailer Connector # TL21RK can be connected to your Jeep at the back for a standard trailer connection. You can splice the 4-way into your vehicle wiring like you mentioned, and that will give you both your vehicle lights as well as the magnetic light function. Your Jeep may be able to use a T-connector to make this a much easier connection. If you already have the wiring for your Jeep to tow a trailer, you can...
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  • Auxiliary Lighting For a Bike Rack Behind a Flat Towed 2024 Chevrolet Trax
    As long as the flat tow wiring is wired in before the 4-Way # C93ZV and you connect the power for the converter directly to the battery it will work. I have seen several use Magnetic Lights # TL21RK which they will wire in on the main harness to have additional lighting and a separate 4-way connector just for that purpose.
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  • Will Blue Ox Alpha Tow Bar BX7365 Work With 2024 Chevrolet Equinox
    Hi Randy; yes, you can use the Blue Ox Alpha Tow Bar BX7365 with your 2024 Chevy Equinox. You will need the Blue Ox Base Plate Kit # BX1730 which is compatible with the tow bar. Do you have the rest of the parts you need for flat towing? If not, I recommend the following: -Roadmaster Smart Diode Kit for Variable Voltage LED Tail Lights # RM38FR (Premier and RS Models) OR -Universal Magnetic Tow Lights - 20' Wiring Harness with 4-Way Flat Trailer Connector # TL21RK (LT and LS Models) -Roadmaster...
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  • Magnetic Towing Lights That Only Require A 4-Flat On The Towing Vehicle
    Hi Roger! What you are looking for would technically be referred to as flat tow lights on our site and we definitely have options for what you need. I wasn't sure if you were wanting LED or incandescent, so here is one of each: LED: Optronics Universal Magnetic Tow Lights - Red LEDs - 20' Wiring Harness with 4-Way Flat Trailer Connector # TLL21RK Incandescent: Optronics Universal Magnetic Tow Lights - 20' Wiring Harness with 4-Way Flat Trailer Connector # TL21RK Both of these only need...
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  • Can 2016 Nissan Frontier 4WD be Flat Towed
    I did some checking and your 2016 Nissan Frontier, 4WD can be flat towed as-is if the vehicle has a manual transmission or if you have an automatic transmission you'd need a driveshaft disconnect. We carry basically everything but the drive shaft disconnect. You can use the Demco tow bar part # DM9511012 that you referenced. You'll need the base plate kit # DM9518186 which is confirmed as a fit for your Frontier. For lighting you can use the diode kit, # RM-15267, and not have to worry...
    view full answer...
  • All Parts Needed to Flat Tow 2014 Jeep Grand Cherokee Behind a Motorhome
    You are correct that there are quite a few parts necessary to flat tow your 2014 Jeep Grand Cherokee behind your motorhome but I'll be happy to list everything you'll need. As you mentioned, you'll need base plates, and the Roadmaster EZ5 # RM-521440-5 is a confirmed fit for your Jeep so long as it is not an SRT-8 model, which since you listed this part I assume it is not. For a tow bar I recommend the Roadmaster Falcon 2 # RM-520 which is out most popular option due to how easy it is...
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  • Parts Needed to Flat Tow 2007 Saturn Aura
    According to the owner's manual, a 2007 Saturn Aura can be flat towed so long as the vehicle is facing forward and it is run for five minutes before being towed and during each RV fuel stop. You'll also need to pull fuse "IGN SENSOR" to prevent the Saturn's battery from draining. There are a number of parts you'll need in order to flat tow your Aura, starting with base plates. The Roadmaster EZ # 523145-1 are a confirmed fit, and I recommend using the Roadmaster Falcon 2 tow bar # RM-520...
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  • Can Blue Ox Tow Bar be Used with Roadmaster Direct Connect Base Plate Kit
    Yes, you can use a Blue Ox tow bar with the Roadmaster base plate kit part # RM-523182-5 as long as you use the adapter part # BX88185.
    view full answer...
  • Complete Flat-Towing Setup for a 2009 Honda CR-V
    In order to flat-tow your 2009 Honda CR-V with four wheels downs, which is the recommended way to tow this vehicle according to the owner's manual, you will need base plates, a tow bar, safety cables, a supplemental brake system, a flat-tow wiring harness, and a possible high-low adapter. I have attached my recommendations on the above items for you below. Base Plates: Blue Ox Base Plate Kit part # BX2246 (See Install Video) Tow Bar: Blue Ox Alpha Tow Bar part # BX7380 (See Install Video) Supplemental...
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  • Recommendation for Adding Taillights to Rear of Hitch Mounted Bicycle Rack
    We don't offer anything purpose-built to install taillights on a hitch mounted bike rack, but you could effectively modify an existing system very easily. If your bike rack is steel, you could simply use a magnetic mount tow light like part # RM-2120. There would be some extra wire you'd need to bundle up and secure with zip ties, but the installation would be very simple. Another option would involve using a light kit designed for a cargo carrier. I'd recommend the # 98174LED kit and...
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  • Can a 2017 Chevy Colorado 4WD be Flat Towed & Parts Needed
    Yes, you can flat tow your 2017 Chevy Colorado with 4-wheel drive (so long as it does not have Adaptive Cruise Control), and we do have all of the parts needed, starting with base plates. For those, due to the hidden look and removable arms they have when you aren't flat towing, I recommend going with the Roadmaster EZ5 Base Plate Kit # RM-523182-5. For a tow bar, a great option for one that is compatible with those base plates, has long telescoping arms, and a self-aligning design for...
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  • Parts Needed to Flat Tow 2017 or 2018 Ford Fusion Hybrid
    To flat tow your 2017 or 2018 Ford Fusion Hybrid (Energi or not) you're going to need a tow bar, base plates, wiring for the lights, a supplemental braking system for the brakes, and possibly a high-low adapter. The most popular base plates for your car are the # BLU44FR. The kit includes all the necessary hardware for installation and there is no welding required. I've linked the install details for you. A tow bar to fit this kit that works great and includes safety cables is the Blue...
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  • Can I Flat Tow a 1989 Ford F-150 4WD?
    Hey Art. So long as your 4WD 1989 Ford F-150 doesn't have front leaf springs you can flat tow it using the Roadmaster Crossbar-Style Base Plate Kit item # 414-1. Here are the rest of the parts you'll need to flat tow your 1989 F-150: Tow Bar, Quick Disconnect, and Safety Chains - Roadmaster Falcon 2 Tow Bar item # RM-520, Quick Disconnect Crossbar Assembly item # 910021-00 and item # RM-643 Wiring Harness - Universal Magnetic Tow Lights - 20' Wiring Harness with 4-Way Flat Trailer Connector...
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  • Solution for Needing More Taillight Visibility Swagman E-Spec Bike Rack
    Hey Stephen, the best solution we have would be a magnetic light kit like the part # TL21RK which you could either attach to the bike rack if possible or to either your bumper or the roof of your vehicle to add additional visibility for the taillights.
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  • Flat Tow Wiring Recommendation for Dolly Towing a 2018 Cadillac XT5
    Hey Mike, thanks for reaching out! I have 2 different options for you to look at, and it really just depends on what style you're looking for: The Heavy Duty Magnetic Tow Lights # TL21RK are wired and will work with your 7-Way if you use the Pollak Adapter # PK12716. For a wireless option we have the Custer Wireless LED Tow Bar Light # LIW-LDTL-7B which plugs in without the adapter and obviously doesn't require you to run wiring along your vehicle and make sure it isn't blowing around...
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  • Magnetic Wiring for 7-Way Connector on Back of 2005 Dodge Ram 1500
    Hey Paul, thanks for reaching out! We have exactly what you described with the Wireless LED Tow Light Bar # LIW-LDTL-7B, but if you're looking for something that's completely wired then you'll need to use the Optronics Lights # TL21RK and the Adapter # PK12716. Are you looking to use this for a flat tow kind of setup?
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  • Recommended Base Plates For 2011 Ford Focus Compatible With Roadmaster Tracker And Flat Tow Parts
    For your 2011 Ford Focus, in order to use the Roadmaster Tracker Tow Bar, your only option is to use the Roadmaster EZ Base Plate Kit - Removable Arms # 524413-1A and unfortunately the instructions you have are all I can offer. The pictures help walk you through it. In the attached instructions you will drill 2 holes and the location will be based on the bracket's other holes that fit into predrilled locations, so it will be easy to mark accurately. The torque specs for the bolts are...
    view full answer...
  • Do You Have a Simple Flat Tow Set Up for My 2007 Lexus GX 470 for Short Distances?
    Hello Jim, I see that you were looking at the Curt Adjustable Tow Bar - Coupler Style for 2" Ball - 5,000 lbs # C19745, nice thing about these tow bars is that they are universal and they don't even need base plate. They come with their own brackets that will be installed on the Lexus. You will need some safety cables as well, # RM-645 will get the job done. For the lights I would go with the Universal Magnetic Tow Lights - 20' Wiring Harness with 4-Way Flat Trailer Connector # TL21RK...
    view full answer...
  • What is Longest Set of Magnetic Tow Bar Lights
    Hey Daniel, the longest set of magnetic tow bar lights we have is the part # TL21RK which is 20 foot long. Is there a reason you need so much more length than that? I checked and the length of a Jeep Gladiator is only 18-1/2 feet long.
    view full answer...


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