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Peterson Trailer Tail Light w/ Grommet and Plug - Stop, Turn, Tail - Incandescent - Round - Red Lens

Peterson Trailer Tail Light w/ Grommet and Plug - Stop, Turn, Tail - Incandescent - Round - Red Lens

Item # 435800
Our Price: $14.63
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Shipping Weight: 0.51 lbs
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4-1/4" Round. Weatherproof, incandescent trailer tail light serves as a stop, tail, and turn signal light. Wedge-base socket protects premium bulb for long life. Tongue-and-groove lens seal. Recessed mount with included grommet and 3-wire plug. Great Prices for the best trailer lights from Peterson. Peterson Trailer Tail Light w/ Grommet and Plug - Stop, Turn, Tail - Incandescent - Round - Red Lens part number 435800 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (191)
  • Q & A (0)
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Peterson Trailer Lights - 435800

  • Tail Lights
  • Round
  • Incandescent Light
  • Red
  • 4-1/4 Inch Diameter
  • Recessed Mount
  • Stop/Turn/Tail
  • Submersible Lights
  • Peterson

4-1/4" Round. Weatherproof, incandescent trailer tail light serves as a stop, tail, and turn signal light. Wedge-base socket protects premium bulb for long life. Tongue-and-groove lens seal. Recessed mount with included grommet and 3-wire plug.


  • Combination trailer tail light serves 3 functions when properly mounted
    • Stop light
    • Tail light
    • Turn signal light
  • Tongue-and-groove lens seals light to protect electrical connections against water and dust
  • Premium bulb rated for up to 15,000 hours
  • Wedge-base socket prevents premature bulb failure
  • Durable polycarbonate housing
  • Red lens over incandescent bulb
  • Compatible with 12V DC systems
  • Recessed mount with included grommet
  • 3-Wire plug makes trailer connections
  • DOT compliant
  • Made in the USA


  • Dimensions: 4-1/4" diameter x 2-1/16" thick
  • Bulb type: incandescent
  • 1-Year limited warranty

Peterson 426KR 4 Inch Round Tail Light Dimensions

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.

M426KR Peterson Trailer Combination Tail Light Kit w/ Grommet and Plug - Weatherproof - Stop, Turn, Tail - Incandescent - Round - Red Lens

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Peterson Trailer Tail Light w/ Grommet and Plug - Stop, Turn, Tail - Incandescent - Round - Red Lens - 435800

Average Customer Rating:  4.8 out of 5 stars   (191 Customer Reviews)

4-1/4" Round. Weatherproof, incandescent trailer tail light serves as a stop, tail, and turn signal light. Wedge-base socket protects premium bulb for long life. Tongue-and-groove lens seal. Recessed mount with included grommet and 3-wire plug.


I needed to replace taillights on an older stock trailer. These lights were exactly as advertised and arrived on time. Easy installation.


Ordered and paid for overnight delivery since I was traveling early in the morning the day following my order. Didn't arrive the following morning even though it shipped 9 driving hours away from my home. Notified CS that the box arrived a day late and was shipped according to the label "UPS GROUND". Got a refund from overnight to 2-Day when I really should have paid ground shipping and would have received the package the same time. Probably not ordering again. Only positive is I didn't have to talk with the man on my trip. It is-what-it-is, at least we all get to pay more and get less for everything these days.


Product as described. Delivery as stat ed.


Perfect fit just as described


Exact replacement for my older WW Livestock trailer. Easy installation. Very reasonable price.



No problems, still working perfectly


I needed to replace a brake light on a used horse trailer. The one that arrived was a perfect fit, and very easy to swap out with the broken one. Looks like it came from the factory!


Once again etrailer had exactly what I needed. Great price fast shipping.


these lights and mounts give me the old school look I wanted at a reasonable price. They have worked perfectly.


I found them on your website quickly and they came all the parts I needed to install them! Fast shipping and always helpful!


The tail light assembly was an exact fit for a really old S & H cargo trailer. I was actually surprised. The original tail light assembly was made by Peterson. I compared measurements, wiring, etc. and it was a match. The light was easy to install and still works perfect. E-trailer is my go to source for all my trailer needs.

Alan M.


The tail light assembly is still working good.


It's the wrong size - my fault. This tail light is for a semi but I needed one for a snowmobile trailer.

Is there a preferred method for return / exchange

Etrailer Expert

Jenny N.


Yes, I will have our Customer Service team contact you about returning the light. We will send you return instructions.


Perfect fit works great I will buy again ,fast delivery well packed. thanks


Timely delivery
Installation will happen
tomorrow …… everything looks good!!


As usual the product was shipped and delivered promptly. The tail lights fit exactly and were installed and working in a very short time. I go here first for all of my trailer needs.



After a year the tail light still works great.


Works great No problems


Inexpensive units. Function properly. Prompt delivery.
The original units were placed in 2004 giving over 14 years of service.
It is anticipated that the replacements will be as reliable.



Working as expected


Quick delivery and very helpful personal. I was called because of mess up on my behalf and the lady fixed everything for me so that I would receive the proper items I ordered.
Very satisfied.


I ordered two trailer taillights on 7/27/2017. On 7/29 got notice that they "shipped".
Package with only one taillight received on 8/5/2017. That is 10 days. Too long for a company with "e" in its name.

Contacted them to "expedite" the second taillight missing from my order on 8/6/2017. Received that on 8/14/2017. 8 days for an expedited delivery on a messed up order.
If you buy from them be patient and hope you get the correct shipment the first time.


I just bought a 2006 goose neck trailer that needed some minor repair. Wanted to match existing good parts. These lights were exact in every way. I liked the fact that new grommet and wire plug were included.


I needed replacement tail lights for my horse trailer and nobody in my area carried the specific replacements. I ordered two tail lights from your company. Within two weeks I received a much anticipated in our remote ( forget Amazon or two day service here) part of Oregon. I am very happy with your prompt service and quality parts!!
Rural Oregon


Exactly what I was looking for. Fair price, processed my order and shipped very quickly. Thanks for outstanding customer service!


Perfect fit!!!


(2) Peterson trailer lights with wiring/plugs and rubber grommets fit perfectly on my M100 trailer. Three wire setup works great with my 4 pin flat wiring harness. Great price ! Highly recommended. Made in the USA.


Light was an exact replacement for one that went missing. Easy to install.


Now I can load up my pony in my 1998 Brenderup and go riding.

Show More Reviews

See what our Experts say about this Peterson Trailer Lights

  • Dimensions of Peterson Red Flush Mounted Sealed Turn Signal Light 435800
    The 4-1/4-inch measurement provided for the Peterson Red Flush Mounted Sealed Turn Signal # 435800 refers to the diameter of the light itself, not of the mounting grommet that is included. The outer diameter of the grommet is 5-1/2-inches.
    view full answer...
  • How To Remove Trailer Taillight that is Recessed Mounted in a Grommet
    Our installer here will spray the light with some lubricant around where the light meets the grommet and then will use a screwdriver to pry the light out first, and then the grommet. If you check out the install video I attached you will see this done.
    view full answer...
  • What Lube Is Needed To Remove or Install Grommet On Trailer Tail Light
    In regards to removing or installing a light with large rubber grommet like the Peterson Trailer Tail Light part # 435800, you can use anything from a soapy water mix or a can of WD-40. It's simply helping the light install or remove with less force as to not damage the rubber.
    view full answer...
  • Troubleshooting Trailer Wiring Where Lights Don't Work on Left Side of Trailer
    It's probably the ground of the taillights on the left side of the trailer. Check to make sure the ground wire is making a solid connection or if the assemblies ground through the hardware make sure the hardware is connected to a clean metal surface. Sometimes using a jumper wire from the ground to the main ground wire of the trailer wiring can fix the issue.
    view full answer...
  • What Hole Size is Needed for Flush Mount of Peterson # 435800 Sealed Tail Light
    The Light, Red Flush Mounted Sealed Turn Signal - Round # 435800 will require holes that are 4-1/2 inches diameter for the grommet to fit properly. I measured this in our warehouse to confirm and have attached a photo to help.
    view full answer...
    Image 1 for
  • Replacement for Signal Stat 9031 Trailer Light Assembly
    I wasn't able to find much detailed information on the Signal Stat 9031 model light assembly that you mentioned other than that it has been discontinued. In order to see if the Peterson Light Red Flush Mounted Turn Signal # 435800 will work well as a replacement, I simply recommend comparing its dimensions to your existing light. This light measures 4-1/4 inches in diameter and 2-1/4 inches deep. It does include a mounting grommet. If this matches the measurements you take on your Signal...
    view full answer...
    Image 1 for
  • Round Trailer Taillight with Grommet Availability
    It sounds like you are looking for round lights that install with a round grommet like the Peterson part # 435800. This is the very common round trailer taillight design seen on a lot of trailers and even flat bed trucks. Let me know if I am off base and I'll see what would be your best option. Feel free to email back with pictures as well.
    view full answer...
  • Left Side Trailer Tail Lights and Blinkers on a Kaufman 43 ft Car Hauler Won't Work
    I've got a couple troubleshooting steps you can go through to determine the cause of this, but it sounds like the right side of the trailer is fully functional and the left side isn't. You can start by testing your vehicle's wiring harness. First check and make sure that the harness is free from dirt and debris; clean it off as needed. Next, you'll want to use a circuit tester like # PTW2992 to make sure that all of the pins on the vehicle harness are delivering power as they should. I've...
    view full answer...
    Image 1 for
  • Replacement Tail Light Needed for Cattle Wagon
    The Peterson Trailer Tail Light w/ Grommet and Plug, # 435800 has dimensions of 4-1/4" diameter x 2-1/16" thick. I do not have the ability to pull an OEM build sheet to know what is on your cattle wagon but lights of this type are fairly interchangeable. Dimensions for fitment are primary, please compare the 4-1/4" diameter against your needs. We also have available the Peterson Mounting Bracket, # 426-09 if needed. Please note the linked product review and installation videos below.
    view full answer...
  • Replacement Brake Assemblies that Can Fit 5,200 lb Hayes Axle
    Most likely we have replacement assemblies but the individual parts will be dependent on the brand and numbers you find on the brake assemblies themselves as they are commonly swapped out for different brands. The assemblies are all interchangeable between brands but the replacement parts are not. So the simple solution we can provide would be all new assemblies with the part # AKEBRK-6.
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  • Replacement Round Trailer Light for 4-5/8" Opening
    For a light that fits your 4-5/8" opening I recommend the Peterson Trailer Tail Light w/ Steel Housing - Stop, Turn, Tail - Incandescent - Red Lens # PM425-3. This light will fit a 4-1/2" diameter hole so your hole will be just a little bit larger. This light comes with a steel housing so the overall dimensions are 5-1/2" diameter x 1-5/8" thick. The distance between the mounting holes is 4-1/4" on center.
    view full answer...
  • Round LED Trailer Tail Lights to Replace Peterson Incandescent Lights
    Three inches is small for a tail light. There aren't even any incandescent stop, tail, and turn lights as small as 3 inches. It looks like to get what you want you will need to got to a 4 inch light. If you like the Peterson lights and need a flush mount that mounts in a grommet you could use # 435800. It does use the plug-in style connector but you would still hardwire all of the wires, including the grounds, to the trailer. This light includes the grommet and pigtail. I have included...
    view full answer...
  • 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 Inch Round Submersible Trailer Light Recommendation
    I have a solution for you, but the 4-3/8" Round Trailer Tail Light # ST24RB that you referenced is not submersible. The closest thing we have to what you referenced that is submersible would be the Red Flush Mounted Sealed Turn Signal # 435800.
    view full answer...
  • What Size Light Fits the Custer Light Mounting Box # MT-BOX4-2
    Yes, the difference in diameter of the openings of the Custer Light Mounting Box # MT-BOX4-2 that you referenced and the diameter of the lights that fit into the holes is the grommet. The Peterson Trailer Tail Light part # 435800 is the correct size for this. It is overall a diameter of 4-1/4 inches and when using the included grommet it fits the hole size perfectly.
    view full answer...
  • Can the Trailer Clearance Light part # MC53RB be Flush Mounted
    The clearance light part # MC53RB that you referenced is a flush mounted light that if you used the grommet part # A54GB you would be able to mount it flush like the # 435800.
    view full answer...
  • Replacing an Incandescent Peterson Light With a Peterson LED Light
    The Peterson LumenX LED Trailer Light # M826R-7 should replace your Peterson # 435800 without issue. That being said, though they are the same diameter, the grommet may not be able to be reused. I suggest also getting # 426-18 just to make sure you are covered. Both of these lights do use the standard 3 prong wiring design, so the wiring can be reused from your original setup.
    view full answer...
  • Replacement LED Trailer Light for Petersen 410-25 Light
    So what you have currently is our part # 435800 which we have a replacement LED style light for with the part # M826R-7. For an install grommet you'll then want the part # 426-18 and for a wiring harness part # 431-491 and you'd be set.
    view full answer...
    Image 1 for
  • Troubleshooting Trailer Tail Light Not Working On New Utility Trailer
    What you are experiencing is common with ground connection issues. Before you get new tail lights you will first want to find the ground connection. This is generally a screw or bolt that is mounted to the trailer. It is common for trailer builders to use the mounting hardware for the tail lights to make the ground connection. They often will not actually clean the paint off where the wire connector meets the frame and rely solely on the screw to carry the current. This is generally not...
    view full answer...
    Image 1 for
  • Can Bulb be Replaced on Peterson Red Flush Mounted Sealed Turn Signal Light 435800
    Peterson brake/turn signal light # 435800 is sealed and cannot be opened up to change out the bulb. I pulled one from the warehouse to verify this and cannot get the lens off (without breaking it) to access the bulb/interior of the light. What I recommend is to use an LED light, # STL43RB, because the LEDs will last much longer than a regular incandescent bulb. For a grommet use # A45GB and for a wiring harness use # A45PB.
    view full answer...
  • Can Peterson Round Flush Mount Trailer Light be Installed in 1/8 Inch Thick Diamond Plate
    Yes you can install red flush mount light # 435800 in diamond plate. The grommet will hold the light in place by compression. For a similar backup light you can use # BU45CB with grommet # A45GB and wiring harness # A45CB.
    view full answer...
  • Forest River LED Trailer Light Replacements
    For an LED version of the light you sent in a picture of you'd want the part # STL22RB with the grommet part # A70GB. I also attached an install video for this for you to check out as well. Since I am not totally sure what the other marker lights are we do have the LED part # MCL31RB which is 4 inch by 2 inch. For a standard roof vent to fit what you have currently we have the Ventline Ventadome kit part # V2094SP-30 which has a 12 volt fan in it. For interior lighting we have the...
    view full answer...
    Image 1 for
  • Trailer Wiring Harness Compatible with Peterson 435800 Trailer Stop/Turn/Taillight
    We don't offer a plug and play trailer harness that would plug directly into the Peterson # 435800 trailer taillight. The lamp includes a 3 pin pigtail that would plug into the rear of the lamp which would wire directly into the trailer wiring. If you need a 4 pole harness for your trailer, we offer them in varying lengths. • For a 20 foot harness, use part # A20WB • For a 25 foot harness, use # A25W2GWB • For a 30 foot harness, use # HM48265 • For a 35 foot harness, use # A35W42B To...
    view full answer...

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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 Adam R
Expert Research:
Adam R
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Updated by:
Laura H
Employee Brian T
Updated by:
Brian T
Employee Randy B
Installed by:
Randy B
Employee Zach D
Video by:
Zach D

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