Peterson Trailer License Plate Light - Submersible - Incandescent - Gray Housing - Clear Lens

Peterson Trailer License Plate Light - Submersible - Incandescent - Gray Housing - Clear Lens

Item # M439K

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Peterson License Plate Lights - M439K
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  • License Plate Lights
  • Rectangle
  • Incandescent Light
  • White
  • Surface Mount
  • Submersible Lights
  • Peterson
3-3/8" x 1-3/4" Rectangle. Waterproof, incandescent trailer light illuminates your trailer's license plate. Durable polycarbonate housing and lens. Surface mount with mounting ears - hardware not included. Accepts standard 2-wire plug. Lowest Prices for the best trailer lights from Peterson. Peterson Trailer License Plate Light - Submersible - Incandescent - Gray Housing - Clear Lens part number M439K can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (54)
  • Q & A (10)
  • Videos (1)
  • Photos
  • Why etrailer?

Peterson Trailer Lights - M439K

3-3/8" x 1-3/4" Rectangle. Waterproof, incandescent trailer light illuminates your trailer's license plate. Durable polycarbonate housing and lens. Surface mount with mounting ears - hardware not included. Accepts standard 2-wire plug.


Features:

  • Compact light illuminates your trailer's license plate
  • Sonically sealed, waterproof housing and lens unit is submersible
  • Durable polycarbonate housing and lens
  • Clear lens over incandescent bulb
  • Compatible with 12V DC systems
  • Surface mount to trailer - hardware not included
  • Accepts industry standard 2-prong plug (142-49 sold separately)
  • Made in the USA


Specs:

  • Dimensions: 3-3/8" long x 1-1/4" tall x 2-3/8" thick
  • Distance between mounting holes (center on center): 2-3/4"
  • 1-Year limited warranty


Manufacturer Cross Reference

Light will work as an exact replacement for:

Optronics # LP97CB


Peterson 439 License Plate Light Dimensions

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.


Surface-Mount Light


Surface-mount trailer lights install using a flange or bracket with mounting holes. These lights lay flat against the trailer surface and only require a small, often pre-existing hole, for wiring. Mounting hardware is used to secure the light to the trailer.



M439 Peterson License Plate Trailer Light - Submersible - Incandescent - Gray Housing - Surface Mount - Clear Lens






California residents: click here


Video of Peterson Trailer License Plate Light - Submersible - Incandescent - Gray Housing - Clear Lens


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




Video Transcript for Peterson Trailer Lights - License Plate Lights - M439K Review


Customer Reviews

Peterson Trailer License Plate Light - Submersible - Incandescent - Gray Housing - Clear Lens - M439K

Average Customer Rating:  4.9 out of 5 stars   (54 Customer Reviews)

3-3/8" x 1-3/4" Rectangle. Waterproof, incandescent trailer light illuminates your trailer's license plate. Durable polycarbonate housing and lens. Surface mount with mounting ears - hardware not included. Accepts standard 2-wire plug.

- M439K
by:

This trailer license plate light was exactly what I needed. The order process was quick and easy and the light arrived within 5 days. I am very pleased. 452185



- M439K
by:

Your site was easy to search . I liked it. I like using pay pal and y'all take it. Thank you. The shipping was very fast aswell. I only use my iPhone to search an buy 208931



- M439K
by:

Great product. Couldn't find it anywhere else. Excellent price and quick delivery. 125117



- M439K
by:

This company is on of the best places to order your parts from. This is the second time I was able to place my order and get what I wanted without all the fuss of waiting. I was looking for a waterproof light for the boat trailer, checked other sites, the internet, boat places, etc. couldn’t find what I liked. Then I remember etrailer I order new hubs from. They had what I was looking for. Should have called them first. Make sure and talk to Pat. 487186



- M439K
by:

Best light I could find for the price. Mounted them in my boat for walkway lighting and tying on lures. Works great. Easy website to find what you're looking for and fast delivery. Will definitly use this business again. Thanks. 85659



- M439K
by:

Good quality product. Exactly as described. The only complaint that I have is that there are zero instructions. What instructions would one need for a light? Which wire is used for ground, black or white? This may not be important for an incandescent bulb but reverse voltage will typically blow an LED. If you do house wiring, you expect the white wire to be ground. If your background, like mine, is radio and DC circuits then the DC ground wire is typically black or green. On these lights, the ground is white. 178686



- M439K
by:

HAVE A NEW TRAILER AND WAS NOT LOOKING TO START ALTERING WIRING. TRIED SEVERAL OF THE LOCAL PARTS HOUSES , BUT COULD NOT FIND MATCH. GOGGLED PART NUMBER AND FOUND EXACT PART, WHICH ARRIVED WITHIN WEEK. NO DRILLING OR SPLICING! HAPPY THAT ORDER QUANTITY HAD NO MINIMUM, DID NOT NEED A BOX OF FIFTY LIGHTS LAYING AROUND GARAGE, BUT WANTED AT LEAST ONE EXTRA PRICE WAS GOOD THANKS 180647



- M439K
by:

Exactly what I wanted. Great price and quick shipping. Highly recommend etrailer 661200



- M439K
by:

Not extremely bright, but worked OK on my trailer tag. Police are commonly pulling people over now days for not having a tag light. 649430



- M439K
by:

etrailer had the light that no one else had... Ill be checking with them first on future items,, Thank You etrailer !!! 648078



- M439K
by:

This light fit just as I expected. Great 616872



- M439K
by:

First time working with etrailer.com and must say that web site made my purchase an easy one. Would not hesitate with future purchases. The license plate light was for an enclosed snowmobile trailer and I was in need of a replacement that was a simple R&R. The unit was a perfect match along with the hole pattern for mounting. I also had some self taping stainless steel screws that I used to mount the unit due to chemicals used on the road (during winter months) cause corrosion in the NE and wrecks havoc where there is an exposure. 589309



- M439K
by:

Easy order, quick service. An exact replacement for my trailer. Thanks 572154



- M439K
by:

Great product, easy to install, works g reat. 550980



- M439K
by:

Perfect OEM replacement light and even came with an extra pigtail connector....I am very pleased with this light so far. 539626



- M439K
by:

Exactly what I was looking for. 515209



- M439K
by:

Excellent product and easy to install. 443183



- M439K
by:

worked great, got here quickly 433929



- M439K
by:

great product works real good 412510



- M439K
by:

Great light, great price. Thanks again 372305



- M439K
by:

Good Product, came exactly as described, well packaged and very quick service. 348087



- M439K
by:

Still burning bright a year after purch ase! 341364



- M439K
by:

I needed 5 different kinds of lights for my boat trailer since they had all burnt out. Etrailer had all of them in stock. They were shipped out the same day I made the call. Three days later they were delivered. Steve Z helped out a lot with my phone order. They get 5 stars from me!! 325153



- M439K
by:

Great product ! Excellent service ! 311005



- M439K
by:

Easy to install and works perfect. 303874



- M439K
by:

Etrailer had what I could not find loca l. 300094



- M439K
by:

Great light fast shipping 269602



- M439K
by:

Quick shipping and great product. 262846



- M439K
by:

Product came and was what it says it was 256174



- M439K
by:

Nice light, really wanted to get an LED light but this one is good quality. Make sure you check the bulb type. I was looking in the LED section and there are a few incandescent lights in this section. 252931



- M439K
by:

light and bracket worked great, super fast delivery Tanks 245752



- M439K
by:

the product works great, like it should 236766



- M439K
by:

Good products and fast delivery i would recommend etrailer to everyone 236645



- M439K
by:

Exactly what I ordered, thanks. 231302



- M439K
by:

Item not installed yet. 221583



- M439K
by:

THIS IS MY SOURCE FOR ALL MY AUTOMOTIVE LIGHTS! I LIKE IT! REFURBISHED MY CUSTUM TRAILOR WITH 10 LED RUNNING LIGHTS, 2 TWELVE INCH LED STOP/TURN/TAIL LIGHTS & OF COURSE THE LED TAG LIGHT. ITS GORGEOUS! THANX, E TRAILER .COM 215823



- M439K
by:

Should make it in LED so its brighter 194730



- M439K
by:

Great product and also great price 190111



- M439K
by:

light works great. 180595



- M439K
by:

Matched perfectly. Prompt shipment 175679



- M439K
by:

Same product that I sm replacing. I give the whole transaction 5 stars 168641



- M439K
by:

Great product with great service. 160670



- M439K
by:

No problem with quick delivery 140604



- M439K
by:

Item purchased to replace another trailer license plate light. Perfect match. Very fast shipping. 134679



- M439K
by:

Does the job perfectly. 133347



- M439K
by:

Ordered product on Sunday and received on Wed and finally got around to installing light on my boat trailer.Light was up to my expectation.Only time will tell if it is waterproof and stays up and running. 116666



- M439K
by:

just what I needed. worked perfectly. 105465



- M439K
by:

Simple, straightforward installation. Seems to be a quality product. 101897



- M439K
by:

extremely pleased with the product and delivery time 92142



- M439K
by:

This product is rather simple, but it is exactly what I needed. The factory light that was on my trailer was small, and burnt out. I simply drilled out the old light mounting, removed it, and drilled one new mounting hole for the new light(using one of the old holes). Light works great and the license plate if very visible at night. Quick delivery from eTrailer was very appreciate! 87326


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Show More Reviews

Ask the Experts about this Peterson Trailer Lights

Do you have a question about this Trailer Light?


  • What is the Difference Between M439 and M439K Trailer License Plate Lights
  • The Peterson Sealed, Trailer License Plate Light, Ear Mount, # M439K, comes with a mounting bracket. I could not bring up the M439. But according to the manufacturer M439 does not come with a mounting bracket. For a license plate light, you might also be interested in Heavy-Duty, LED Trailer License-Plate Light with Mounting Bracket, # LPL55CB. This light comes with a mounting bracket.
    view full answer...

  • Availability of LED-Version of Petersen License Plate Light # M439K
  • Peterson does not offer an LED-type version of their incandescent License Plate Light # M439K but Optronics does offer their # LPL41CB, which is a Heavy Duty Trailer License Plate LED Light. This unit is also an ear-mount type, features a chrome-plated housing, 5 LEDs and a 2-wire hookup. I have linked a review video for your reference. The mounting hole spacing on the # M439K is 2-3/4-inches center-to-center. The mounting hole centers for the Optronics light are spaced at 3-1/4-inches....
    view full answer...

  • Availability of a License Plate Light that is Made in the U.S.A.
  • I went out to the warehouse and pulled Peterson license plate light # M439K. The packaging does indicate that it is made in the USA. I have included a link to a video review of the light for you.
    view full answer...

  • Replacement Trailer Lights for 1999 ProCraft Boat Trailer
  • We carry a broad range of trailer light replacement lenses as well as replacement lights and complete trailer lighting kits. The linked pages will display both license plate lights like # M439K and individual replacement parts like lens kit # W003372-73. You can sort the results shown by using the click-on filters on the pages. Usually the part number for a trailer light appears on the light base, rather than on the lens which usually displays only SAE/DOT info. I did find many photos...
    view full answer...

  • What Are Center To Center Dimensions Of Mounting Holes On Peterson Trailer License Plate Light
  • The mounting holes on the Peterson Sealed, Trailer License Plate Light, part # M439K are 2-3/4-inches center-to-center. I have attached a photo of the light with the mounting dimensions noted. This light has a polycarbonate lens and is sonic welded for a watertight seal and also includes the wiring plug.
    view full answer...

  • Recommendation for License Plate Lamp to Shine Upward
  • My best suggestion would be to use a bracket like the Steel Trailer License Plate Mount Bracket, # LP20SB, with the Peterson Sealed Trailer License Plate Light, # M439K, and mount the bracket upside down. This would give you a lamp below the license plate that would shine upwards. Before making a purchase, I do recommend contacting the Department of Transportation just to make sure that mounting a light that shines upward would not violate any of their regulations. Please also keep...
    view full answer...

  • Availability of LED License Plate Lights
  • We do have some LED license plate lights. You could use # LPL31CB or # LPL41CB. I have included some links to video reviews for each of these lights for you.
    view full answer...

  • Looking for a Trailer License Plate Light that is Submersible
  • All of the license plate lights we have that are listed as submersible are incandescent, not LED. We have Peterson light # M439K and Optronics light # LP97CB. Though the lights are submersible you will need to make sure the wiring connections are water-tight by using something like liquid electrical tape, # SWC50122.
    view full answer...

  • What to Do if the Peterson License Plate Light M439K Burns Out its Bulb
  • So that it's watertight the Peterson Sealed, Trailer License Plate Light # M439K that you referenced is sonically welded. There is no way to replace the bulb. You would just have to replace the entire light.
    view full answer...

  • Power Connection of a Trailer License Plate Light on a 1997 Dodge 1500 Van
  • The Peterson Sealed, Trailer License Plate Light, Ear Mount, part # M439K does not have a receptacle to plug into a cigarette lighter. You will need to splice the black wire from the back of the light into the Dodge Van running light circuit behind one of the the vehicle taillights, so that it will illuminate whenever the running lights are on. The white wire will need to be connected to good ground point.
    view full answer...


Do you have a question about this Trailer Light?




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Info for this part was:

Photos by:
Jackie C
Expert Research:
Robert G
Expert Research:
Patrick B
Expert Research:
Michael H
Expert Research:
Adam R
Installed by:
Cole B
Expert Research:
Jeffrey L
Photos by:
Sam P
Photos by:
Sarah H
Updated by:
Sarah W
Photos by:
Jeffrey L
Updated by:
Brian T

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