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Peterson Trailer Tail Light - Weatherproof - Stop, Turn, Tail - Incandescent - Round - Red Lens
Peterson

Peterson Trailer Tail Light - Weatherproof - Stop, Turn, Tail - Incandescent - Round - Red Lens

Part Number: M426R
In Stock
$7.60
Retail:$16.34
You Save: 53%
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4-1/4" Round. Weatherproof, incandescent trailer light functions as a stop, tail, and turn signal light. Wedge-base socket protects premium bulb for long life. Tongue-and-groove lens seal. Recessed or flange mount. Accepts 3-prong plug. Great Prices for the best trailer lights from Peterson. Peterson Trailer Tail Light - Weatherproof - Stop, Turn, Tail - Incandescent - Round - Red Lens part number M426R can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (1224)
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  • Videos (1)
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Peterson Trailer Lights - M426R

Highlights

  • One Light, 3 Functions: Works as stop, tail, and turn signal for simple, clean wiring.
  • Built to Stay Sealed: Tongue-and-groove lens keeps out water and dust for longer life.
  • Long-Lasting Bulb: Premium incandescent rated up to 15,000 hours reduces replacements.
  • Easy Power Connection: Accepts standard 3-prong PL-3 plug for quick, secure hookup.
  • Flexible Mount Options: Recessed or flange mounting fits different trailer setups.
  • Road Legal: DOT compliant so your trailer meets lighting requirements.
Made in USA

Features to know about

Reliable Stop, Turn, and Tail Lighting: 4-1/4" Round Weatherproof Design

This 4-1/4" round Peterson trailer tail light does three jobs in one—stop, turn, and tail—so you get dependable signaling in any condition. The weatherproof housing and tongue-and-groove lens seal keep out water and dust, protecting the electrical connections for consistent performance. It’s built with a durable red polycarbonate lens over an incandescent bulb that’s rated for up to 15,000 hours of use, giving you long life without early failures.

Long-Life Incandescent Performance: Wedge-Base Socket Protection

Incandescent lights can wear out fast when vibration or moisture gets to the bulb, but this one is built differently. The wedge-base socket helps prevent premature bulb failure by keeping the filament secure and maintaining clean contact. The premium bulb itself lasts up to 15,000 hours, which is longer than typical trailer bulbs in this size range. That means fewer replacements and less downtime between trips.

Straightforward Installation: Recessed or Flange Mount Options

No guesswork when it’s time to install. This light accepts the industry-standard 3-prong PL-3 plug (sold separately), making wiring simple and familiar. You can mount it recessed with a grommet (426-18, sold separately) or use a flange bracket (424-09, sold separately) for surface setups. With a compact 2-1/16" depth, it fits neatly into standard cutouts and helps create a clean, finished look on your trailer.

Close-up of PL-3 3-prong wiring connection plug compatible with Peterson 426R trailer tail light.

Built Tough for Everyday Use: DOT Compliant and Cross-Compatible

Engineered for reliability, this light meets DOT requirements and matches popular models like Grote #52770 and #52772, Truck Lite #40042R, and Optronics #ST45RB. Its rugged build holds up to regular wear so you can count on consistent brightness and signaling every time you hook up.

Specs

Dimensions

  • Diameter: 4-1/4"
  • Thickness: 2-1/16"

Technical diagram of Peterson 426R 4-1/4 inch round trailer tail light showing diameter and depth measurements.

Electrical

  • Bulb type: incandescent
  • System compatibility: 12V DC

Warranty

  • Warranty: 1-Year limited warranty

M426R Peterson Trailer Combination Tail Light - Weatherproof - Stop, Turn, Tail - Incandescent - Round - Recessed Mount - Red Lens





Video of Peterson Trailer Tail Light - Weatherproof - Stop, Turn, Tail - Incandescent - Round - Red Lens
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Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Peterson Trailer Tail Light Review

Today, we're going to take a look at the Peterson Trailer Tail Light. This is going to have your stop, tail and turn signals. It has a round design with a red lens. This incandescent trailer light is going to be a great replacement for any broken or damaged lights on your trailer and it's going to give us our stop, tail and turn signals when it's properly mounted. Now, it does have a recessed mount with a grommet that is sold separately. You can find that here at etrailer.com using part number 426-18.

It also is going accept the industry standard 3-prong plug. You can use either part number 431-491 or part number 421-491, which I have here.You may use this just to demonstrate how bright the light is going to be. That plug is just going to pop into the back to match up those prongs. Something I like about the Peterson lights is that they already have a little bit of dielectric grease installed on those terminals to help maintain a good connection and also, prevent any water from getting in there and causing any damage or bad connections overall.I'm just going to hook this up to my power source. And my ground connection.

Then, I'll tap the red wire for that signal. We turn on our power. You'll see our running light is coming on there since I have it connected to the black wire. Then, if I connect the circuit for the red wire, that's going to give us our turn signal or our break signal. As you see, it's going to be that brighter light, so it's going to give us all those proper functions when we're out on the road, maintain DOT compliance.This light itself is going to be DOT compliant.

Turn the lights off in the studio here, you'll see that running light, how bright that is there and then, again, turning it to the break or turn signal. It's going to nice and bright to let anybody else on the road know we're coming to a stop or turning.Shut off our power. Then, to remove that plug, it has two tabs on the back. I can just pop that off. It does take a little bit of force to get that to pop off there, which is not a bad thing.

You don't want it to just fall off. There we go.Again, it doesn't just fall off. It takes a little bit of force. Not too hard but I just don't want to break anything. Then, as far as our dimensions, it's going to be 4.15 inches in diameter and about 2 an a 16th in depth going to that top of that lens there.Another last thing with this light is that it is a made in USA product. That's going to do it for our look at the Peterson Trailer Tail Light with the stop, tail and turn signal with a round design with a red lens.

Customer Satisfaction Score:

Ratings & Reviews

4.8

1224 reviews
Review sort icon
4-1/4" Round. Weatherproof, incandescent trailer light functions as a stop, tail, and turn signal light. Wedge-base socket protects premium bulb for long life. Tongue-and-groove lens seal. Recessed or flange mount. Accepts 3-prong plug.

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Arrived on time as described



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Same as grommet. They go together!



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Easy install, works as expected.



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Fast and accurate, thank you!



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Great service and exactly the part I ne eded.



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Very difficult to find this light, your company had it and got it to us fast!



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Shipped very fast, great service! Very detailed description, about impossible to buy the wrong part, will do business again!



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No problems or burn outs after 1 year of installing these, I would recommend them.



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Exactly as advertised. Perfect fit.



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Fast delivery great product!!



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Great site, easy to navigate and good customer service, my item even came a day earlier which was great



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Fits my horse trailer perfectly!



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Ez to order, but don’t use usps for shi pping



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I was needing a tail light for my dump trailer and wasn't familiar with this submersible so I checked

etrailer.com and they had exactly what I needed at a very reasonable price. Back on the road.



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The one and only Peterson 426. Perfect replacement. Fitting is very tight on the electrical plug so be prepared to work a bit.

Jeffrey S. profile picture

Jeffrey S.

11/15/2021

The mount on my trailer is designed to fit these tail lights and still working great!



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I really liked them, i need to order more for a trailer but wish i could get them shipped UPS though, my usps service is not reliable.



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Hard to find item delivered promptly at a good price. A necessary item for my Gulfstream RV. You need stoplight and backup lights! I ordered and received both!
FYI, good replacement for GloBrite Tail & bkup 9551 & 9547



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Correct fit with fast shipping



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Required size for lighting on a trailer built many years ago. Haven't installed them yet but expecting full compatibility. It turns out that this light pattern in on several trailers owned by the family at large. Plenty of opportunity to use the bulbs in the future.


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See what our Experts say about this Peterson Trailer Lights

  • Correct Replacement for Peterson 410-25 Trailer Tail Light
    The Peterson Trailer Tail Light part # M426R is the correct replacement for a Peterson 410-25. It is also available with the grommet and harness as part # 435800.
    view full answer...
  • 4-1/4 Inch Round Clear LED Light Upgrade Lumen Rating
    The Peterson Trailer Tail Light - Weatherproof - Stop, Turn, Tail - Incandescent - Round - Red Lens # M426R is 4-1/4 inches diameter and using a grommet that fits the 4-1/2 inch hole. With this same grommet you can use the Peterson LumenX LED Trailer Tail Light - Weatherproof - 7 Diodes - Clear Lens # M826C-7 which has a 1200 lumen output. The GloLight LED Backup Light for Truck or Trailer - Submersible - 21 Diodes - Round - Clear - Qty 1 # BUL101CB has 326.4 lumens. The Optronics LED...
    view full answer...

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Info for this part was:

Employee Randy B
Installed by:
Randy B
Employee Daron K
Edited by:
Daron K
Employee Zach D
Video by:
Zach D
Employee Brian T
Written by:
Brian T

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