1. Tow Bar Wiring
  2. Optronics
  3. Removable Tail Light Kit
  4. Bypasses Vehicle Wiring
  5. Magnetic Mount
  6. Universal
Magnetic LED Tow Light Kit - Weatherproof - Red Lens - 20' Wiring Harness - Qty 2

Magnetic LED Tow Light Kit - Weatherproof - Red Lens - 20' Wiring Harness - Qty 2

Item # TLL21RK
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Our Price: $80.00
Tow Bar Wiring
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TLL21RK - Removable Tail Light Kit Optronics Bypasses Vehicle Wiring
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(2) 4" Diameter magnetic LED tow lights provide stop, tail, and turn signals for your towed car without splicing into its wiring. Heavy-duty magnetic bases provide a secure hold. 20-Ft harness with 4-Flat plug connects to RV. Lowest Prices for the best tow bar wiring from Optronics. Magnetic LED Tow Light Kit - Weatherproof - Red Lens - 20' Wiring Harness - Qty 2 part number TLL21RK can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (8)
  • Q & A (3)
  • Videos (2)
  • Photos
  • Why etrailer?

Optronics Tow Bar Wiring - TLL21RK

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

(2) 4" Diameter magnetic LED tow lights provide stop, tail, and turn signals for your towed car without splicing into its wiring. Heavy-duty magnetic bases provide a secure hold. 20-Ft harness with 4-Flat plug connects to RV.


  • Removable LED lights provide stop, tail, and turn signal functions for your trailer or towed car
    • Designed for cars and trailers no wider than 80"
  • Sonically sealed, waterproof housing and lens unit
  • Durable surface-mount technology (SMT) construction of LED circuit board
    • Better withstands shock and vibration
    • Allows improved heat distribution and thinner construction
  • LEDs make great replacements for incandescent lights
    • Last 50 times longer
    • More efficient - provide brighter light with less power output
    • No bulbs to replace - no brittle filaments
  • Durable polycarbonate housing and lens
  • Red lens over white LEDs
  • Heavy-duty magnetic bases allow lights to quickly secure on a vehicle's trunk or roof
    • 20' Wiring harness can be easily routed beneath the towed vehicle
  • 4-Pole flat connector hooks up to trailer connector at rear of RV
    • Additional wire with 4-pole flat connector included for wiring an RV without an existing trailer connector
  • DOT compliant


  • Light diameter: 4-1/4"
  • Overall dimensions: 3-7/8" long x 5-15/16" tall x 2-3/16" wide
  • Tow light harness length: 245"
  • Wiring length between lights: 63"
  • Length of additional wiring harness for RV: 35"
  • Diodes (per light): 6
  • Power draw at 12.8 volts
    • Stop/turn signal light: 0.36 amps
    • Tail light: 0.03 amps
  • Lifetime warranty on LEDs

Magnetic LED Tow Lights

A towed vehicle is required by law to have functional brake and signal lights that illuminate at the same time as the brake and signal lights on the motorhome or RV that is towing it. These removable tow lights make it easy to add running lights, brake lights, and turn signals to your towed car or trailer.

Simply mount the lights on your vehicle's trunk or roof with the heavy-duty magnetic bases. A 63" long section of wiring connects the tow lights, giving you enough slack to position the lights where you want them. Then run the 245" long wiring harness up to the front of your towed vehicle and across your tow bar and connect it to the 4-way flat on your RV.

If your RV doesn't have a trailer connector, then you can wire the extra 35" long 4-way harness that comes with this kit to your RV. And if your RV has a 6-way or 7-way trailer connector, an adapter (sold separately) will be required to connect the tow lights to your RV.

Sonically Sealed, Waterproof Trailer Light

The waterproof construction of this light makes it ideal for use on trailers that may be submerged, like a boat trailer. The housing and lens are sonically sealed together to create a single unit, which means that water will not get into the light and damage the diodes or circuit board.

TLL21RK Optronics Magnetic Mount LED Towing Light Kit w 20' Wiring Harness - Red Lens - Waterproof

California residents: click here

Video of Magnetic LED Tow Light Kit - Weatherproof - Red Lens - 20' Wiring Harness - Qty 2

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Optronics Magnetic LED Tow Light Kit Review

So we're going to take a quick look at the LED Magnetic Tail Lights from Optronics. Now, a lot of times with a flat tow set up, it gets pretty invasive when you have to install the wiring, in order to have full functionality of your tail lights that work in conjunction with the tail lights on your RV. But, these are going to be a great replacement. You don't have to worry about taking apart your back tail lights. You're not going to have to worry about drilling into them, maybe to have that couple extra diodes. You're not going to have to worry about running wiring inside your vehicle all the way back.With this set, it just uses magnets to stick to the back of your vehicle.

The wiring runs on the outside of your vehicle, all the way to the four pull hook up on your RV. And this is going to give you functionality of your tail lights. These tail lights are going to work in conjunction with the tail lights on your RV. We're going to have left turn signal, right turn signal, and brake lights. LEDS also are going to make a great replacement for incandescent bulbs.

They're going to burn brighter, last a lot longer and be more efficient when they're in use.The tail lights are going to be able to fit on any towed vehicle or trailer that's less than 80 inches wide. Now, the lights are going to have a strong magnet holding them onto the vehicle. Any strong winds aren't going to be able to blow it over. We'll go ahead and take that off real quick to show you the bottom. See, we did have this protective sticker, right there.

It's how we'll make sure that the magnet does not harm or scratch the finish of your vehicle. It also does have a slot that your wire comes out of. That's going to help make sure that it's not sitting on top of the wire, like that. It could possibly damage it over time. It's going to last a lot longer that way.We're also going to have a nice durable plastic construction on the outside.

It is going to be weather proof, so no rain water or anything like that's going to get into your light to damage it. This is also going to be a great solution for if you do tow multiple vehicles. You're not going to have to get separate wiring done on both of those vehicles. When you want to tow one vehicle, you just set this up on the back of it. Next time, you want to tow your other vehicle, you have this packed up, you can get it out, set it on that vehicle, it will be the exact same set up.When you arrive to your destination, and unhook your tow bar set up, this is easy to just unhook this, grab it all up, we could just stow it in our trunk.Now, we've gone ahead and brought our lights inside, so you can see how bright they are when the lights are turned off. And we just have our running lights right now, but with our tester box, we'll go ahead and go brake lights, right there. You see, they're much brighter, so they're going to be very visible at night or day when you are applying the brakes. We'll go left turn, and then right turn.Now, like I said, installation is going to be very quick and easy. First thing you want to do, is make sure you clean the surface where you are going to be mounting the lights. We've already done that, just wipe down the top of the trunk. Now, we can go ahead and pick the spot we want to place our lights. You do want to make sure you get it as wide as possible without sacrificing any of the stability. So, obviously, we wouldn't want to come over here on the side of the car, but we can come right here, right above the tail light.So, you're not going to want to mount it on the side right here. It won't be as stable, but we can come right here where it's flat and right above our left tail light, and we'll go ahead and just set that there. Now, how you can tell, that this is for the left side, is that the brown wire is going to be for your left turn signal, while the green wire is going to be for your right turn signal.We can just slide the wire up into the slots right there, to make sure that we're not sitting it right on top of our lights. Set it right there. Now, we're going to have this excess wire right here, connecting our two lights. We can just bundle that up, and secure it so it's not flying around in the wind at all. You can use zip tie or in our case, we're just going to go ahead and grab this rubber band right here. Just wrap that around a couple times.When routing it into your RV, you probably just want to go ahead and avoid going on the inside of your vehicle. We'll come on the outside, but we use different points to make sure we can secure the wire, without having to use any straps. We're just going to use the doors. So, we'll start running this wire, all the way to the front.Now, I'm just going to use the doors to secure it. You can either just pinch it into that weather stripping right there, or in our case, we're just going to go inside this door, and pass it to our driver's side. You want to make sure you get it pretty taught, but too hard. So, once we get that in there, we'll just go ahead and shut that back door. Now we'll run it out here, will come out the side of our door. We can kind of leave some excess in there if we want, depending on how much of excess wire you will have.So, we'll go and shut that in there. And we'll just keep running it all the way, until we get to our connector. And we do have a seven pull hook up on our, RV, so we do have to get an adaptor to be able to convert it for our four pull flat connector. And then we just plug it into our four pull hook up or adaptor.Now, obviously, you do want to make sure you do have full function of both tail lights, but once you do that, you're ready to hit the road. Thank you all for watching, that's going to do it for our look at the LED Magnetic Tail Lights from Optronics.

Customer Reviews

Magnetic LED Tow Light Kit - Weatherproof - Red Lens - 20' Wiring Harness - Qty 2 - TLL21RK

Average Customer Rating:  4.9 out of 5 stars   (8 Customer Reviews)

(2) 4" Diameter magnetic LED tow lights provide stop, tail, and turn signals for your towed car without splicing into its wiring. Heavy-duty magnetic bases provide a secure hold. 20-Ft harness with 4-Flat plug connects to RV.


Bought these magnetic trailer lights for my hitch-mounted e-bike rack. With two bikes on the rack, the rear car lights are partly obscured. These lights attach firmly to the rack with the magnets but I will secure them with straps as the rack surface is rounded. Plenty bright. Haven’t gone any distance yet, but I will drive reassured that the cars behind will better see my braking and turning.


I've seen magnetic tow lights before but not like these LED's. As soon as they arrived I opened them up, checked them out and they are very well built,the magnets seem very firm and they are BRIGHT. The video on the ETrailer site does no represent how bright these light are in my opinion. Very pleased with the quality and how visible these lights are.




Great product, just as described. I am using it on my kayak trailer to replace the original incadescent lights.


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





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Info for this part was:

Employee Andrew K
Video by:
Andrew K
Employee Colin H
Installed by:
Colin H
Employee Cole B
Installed by:
Cole B
Employee Chris R
Video Edited:
Chris R
Employee Daron K
Edited by:
Daron K
Employee Brian T
Written by:
Brian T

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