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Peterson Trailer Tail Light - Submersible - Stop, Tail, Turn - Incandescent - Oval - Red Lens
Peterson

Peterson Trailer Tail Light - Submersible - Stop, Tail, Turn - Incandescent - Oval - Red Lens

Part Number: M421R
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$14.66
Retail:$18.58
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6-1/2" x 2-1/4" Oval. Waterproof, incandescent trailer light functions as a stop, tail, and turn signal light. Recessed mount with grommet (sold separately). Accepts 3-prong plug. Great Prices for the best trailer lights from Peterson. Peterson Trailer Tail Light - Submersible - Stop, Tail, Turn - Incandescent - Oval - Red Lens part number M421R can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (29)
  • Q & A (0)
  • Videos (2)
  • Photos

Peterson Trailer Lights - M421R

  • Tail Lights
  • Oval
  • Incandescent Light
  • Red
  • 6-1/2L x 2-1/4W Inch
  • Recessed Mount
  • Stop/Turn/Tail
  • Non-Submersible Lights
  • Peterson

6-1/2" x 2-1/4" Oval. Waterproof, incandescent trailer light functions as a stop, tail, and turn signal light. Recessed mount with grommet (sold separately). Accepts 3-prong plug.


Features:

  • Combination trailer tail light serves 3 functions when properly mounted
    • Stop light
    • Tail light
    • Turn signal light
  • Sealed housing and lens unit is submersible
  • Durable polycarbonate housing
  • Red lens over incandescent bulb
  • Compatible with 12V DC systems
  • Recessed mount with grommet (421-18 - sold separately)
  • Accepts industry standard 3-prong plug (431-491 or 421-491 - both sold separately)
  • DOT compliant
  • Made in the USA


Specs:

  • Overall dimensions: 6-1/2" long x 2-1/4" tall x 2-3/8" deep
  • Bulb type: incandescent
  • Power draw at 12.8V: 2.1 amps
  • 1-Year limited warranty


Peterson 421R Oval Tail Light Dimensions

PL-3 Wiring Connection

Optronics PL-3 Connection

This light has an industry-standard PL-3 connection as pictured above. The light accepts a 3-prong plug (sold separately).


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 circuit board is sealed, which means that water will not damage the diodes or circuit board.


Recessed-Mount Light

Recessed Grommet Mount Trailer Light Installation Diagram

Recessed-mount trailer lights install with a grommet, which is often sold separately. These lights extend past the trailer surface and require a hole for installation. If replacing a light, you can utilize the pre-existing hole. If installing a new light, you will need to cut a hole or use a mounting bracket (sold separately) to complete the installation.



M421R Peterson Trailer Tail Light - Submersible - Stop, Tail, Turn - Incandescent - Oval - Grommet Mount - Red Lens




California residents: click here


Video of Peterson Trailer Tail Light - Submersible - Stop, Tail, Turn - Incandescent - Oval - Red Lens

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




Video Transcript for Peterson Trailer Tail Light: The Breakdown

Hi, everyone. Aiden, here with etrailer.com. Today, we're gonna be taking a look at and showing you how to install this incandescent trailer taillight from Peterson. Let's get started. So, this is an incandescent bulb which means a couple things. It's gonna be more prone to breaking over time, just not lasting as long.

It's gonna be less energy efficient, and as it runs, it's gonna run a little bit more hot than an LED one might. So personally, I would go with an LED taillight, but that's just me. This one still will get the job done. It's got all your normal functions like the running light here, your turn signal, and your brake lights. And it's gonna be plenty bright to see in most applications, so I'm not worried about any sort of visibility at night.

You do have a durable polycarbonate lens on the outside here. So it'll be impact resistant. And the whole unit here is sealed. So if you plan on putting this on a boat trailer, something that's gonna be in and around water, it is fully submersible and waterproof. So we don't have to worry about any sort of water intrusion.

Now, getting this installed is going to be pretty straightforward and simple. You will need a couple of things but we'll cover that in the install. So let's check that out now. Once we've got the old light removed we can grab our new one and you'll notice that there isn't really anywhere to mount it up. You will need to pick up this grommet separately.

Basically the light housing will sit inside of the grommet here. You can see it kind of wraps around the back and holds it in place. And then this is actually what's gonna help us mount the light flush with the trailer here. This flange here will wrap around. So we'll go ahead and plug our light in and make that happen. So we can take our industry standard PL3 plug and just plug that into the light. Now, if you don't have that plug on your trailer side you can pick that up separately here at etrailer. Just be sure to check the website, to pick that up. Plug that in like that and then just tuck all the wiring into this portion of the trailer here. And we can attach the light. I typically like to start at the top or bottom and just sort of push it into place. You'll see that seal around it. You'll see it, you'll feel it kind of pop into place. But we'll just do that around the whole light here to get it mounted up. With everything plugged in, we can go ahead and test for function. We've got our running lights, our turn signal, and our brake lights. Once we verify that all of those signals are working, we can go ahead and hit the road. And that'll do it for our look at this Peterson incandescent trailer taillight. Thanks for watching..

Customer Satisfaction Score:


Customer Reviews

Peterson Trailer Tail Light - Submersible - Stop, Tail, Turn - Incandescent - Oval - Red Lens - M421R

Average Customer Rating:  4.7 out of 5 stars   (29 Customer Reviews)

6-1/2" x 2-1/4" Oval. Waterproof, incandescent trailer light functions as a stop, tail, and turn signal light. Recessed mount with grommet (sold separately). Accepts 3-prong plug.

by:

I think this is a good product and I was able to get exactly what I needed the first time. No problems.

William

9/10/2024

Great product. Works great and is easy to install



by:

Great seller



by:

I was surprised that I was able to get the part so easy. It is good to know where to get trailer parts



by:

Scuffed up surface from no packaging and thrown in a box to rattle around with other items in the shipment. No biggie, it's just a trailer. I got the scuffs off with plastic polish.



by:

I ordered seven front lights seven rear lights and7 tail lights and a tag light. All of them were thrown in the box and we’re scratch on shipping. None of it was Wrapped 1

Etrailer Expert

Sierra K.

9/22/2021

Sorry to hear about this. Customer Service will reach out to you.



by:

I love etrailer



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Love etrailer



by:

Appreciate the timely shipping. Products were the exact match for what I needed. Unfortunately one of the trailer wire connectors was damaged so now I need the 3 wire plug connector.



by:

Direct replacement for the factory installed brake/turn signal/tail light on my 20+ year old trailer - I was really worried about finding the correct replacement parts but etrailer.com had everything I needed. The ordering process was a breeze and my order arrived quickly



by:

Fast excellent service!



by:

Matches the original exactly.



by:

Great product. Great price and fast shipping. Purchased to replace one that had gone out. Direct replacement made it an easy and quick repair.



by:

Product came when it was supposed to. Price was ok. Found out I could have bought it $3 cheaper locally.



by:

great co. good prices



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Great service



by:

exactly what I needed, purchased easily and delivered quickly!



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Great, hope it fits!



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Show More Reviews

See what our Experts say about this Peterson Trailer Lights

  • Optronics LED GloLight Replacement for Peterson M421R Grommet Mount Trailer Tailllight
    The Peterson 421R which we carry as part # M421R is a grommet mount 3 function taillight. Optronics does indeed offer an LED GloLight that would work as a replacement, which is available as part # STL111RB. You'll also need the wiring pigtail, part # A45PB. If you need the mounting grommet, they're available as part # A70GB. You can see a product video for the # STL111RB GloLight by using the provided link.
    view full answer...
  • Is Etrailer Logo Removable from Peterson Trailer Lights
    The etrailer logo is a sticker placed on the Peterson Clearance lights # M146R for photo and video use. This line of lights including # M142R and # M421R does not come with the sticker. If you do by chance receive a product with this sticker it is easily removable.
    view full answer...
  • Does Power Need to Be Removed From Submersible Light Before Backing Into Water
    To replace your Peterson M421R light you'll need the Peterson Trailer Tail Light # M421R. This installs with a simple plug in the back so the installation itself should be pretty easy to do. Just be sure to unplug your trailer wiring prior to backing into the water next time. The submersible rating on the light means the light won't be ruined if it touches water, but you still need to disconnect the power since water can short circuit the light.
    view full answer...

Do you have a question about this Trailer Light?


Info for this part was:

Employee Jacob T
Video Edited:
Jacob T
Employee Kathleen M
Installed by:
Kathleen M
Employee Aidan B
Installed by:
Aidan B
Employee Daron K
Edited by:
Daron K
Employee Brian T
Written by:
Brian T
Employee John S
Video by:
John S

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