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Peterson Thin Line Clearance or Side Marker Trailer Light - Incandescent - Oval - Amber Lens
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Peterson

Peterson Thin Line Clearance or Side Marker Trailer Light - Incandescent - Oval - Amber Lens

Part Number: 427400
64 Reviews | 8 Questions
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$4.24
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peterson trailer lights non-submersible 3-1/2 inch diameter thin line clearance or side marker light - incandescent oval amber lens
peterson trailer lights marker non-submersible
peterson trailer lights marker non-submersible 427400
peterson trailer lights non-submersible 3-1/2 inch diameter 427400
peterson trailer lights clearance 3-1/2 inch diameter

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3-1/2" x 1-1/8" Oval. Low-profile incandescent trailer light serves as a clearance or side marker light. Durable base with scratch-resistant acrylic lens. Surface mount - horizontal or vertical. 1-Wire design. P2 rated. (1) 194 bulb. Great Prices for the best trailer lights from Peterson. Peterson Thin Line Clearance or Side Marker Trailer Light - Incandescent - Oval - Amber Lens part number 427400 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Peterson Trailer Lights - 427400

Highlights

  • Low-Profile Fit: Thin Line 3-1/2" x 1-1/8" design fits tight spots on trailers.
  • Clear, Amber Visibility: P2 rating gives 90° total light coverage for marker or clearance use.
  • Simple Power Setup: 1-wire design grounds through hardware for quick installation.
  • Durable Build: Scratch-resistant acrylic lens and high-impact base handle daily use.
  • Reliable Illumination: Incandescent 194 bulb draws 0.25 amps at 12V and lasts up to 15,000 hours.
  • Direct Replacement Ready: Matches Grote #45253, Truck Lite #1555A, and Optronics #MC68AB.

Features to know about

Slim Profile for Tight Spaces: Low-Profile Thin Line Design

When clearance space is limited, this light fits where others won’t. The Peterson Thin Line Clearance or Side Marker Trailer Light measures just 3-1/2" long x 1-1/8" tall x 1-1/16" deep, giving it a compact footprint that mounts neatly to flat surfaces without sticking out. The surface-mount design can go vertical or horizontal, and with a 2-3/4" center-to-center mounting pattern, it’s easy to match existing holes.

Reliable Illumination That Lasts: Premium 194 Bulb Performance

This light uses a single 194 incandescent bulb rated for up to 15,000 hours of use. At 12V it draws only 0.25 amps, making it efficient while still putting out steady amber light through its durable, scratch-resistant acrylic lens. The amber lens delivers consistent color and brightness for clear visibility as a clearance or side marker light.

Simple Wiring and Setup: One-Wire Ground Through Mounting Hardware

Installation is straightforward thanks to the single-wire setup. Power runs through the wire lead, and the ground connects automatically through the mounting hardware—no need for extra wires unless installed on non-metal surfaces. Just fasten it securely and you’re ready to go, making it an ideal choice for quick replacements or upgrades.

Dependable Build for Everyday Use: Durable and DOT Compliant

The high-impact base and snap-on lens hold up well against vibration and road wear. Its sealed construction is non-submersible but tough enough for regular towing conditions. Fully DOT compliant and P2 rated, the beam provides a 90-degree spread—perfect for use as either a clearance or side marker light when properly mounted.

Direct Replacement Fit: Matches Common OEM Models

Perfect for keeping things simple, this Peterson light directly replaces Grote #45253, Truck Lite #1555A, Optronics #MC68AB, and Primatronics #PT2630A. No drilling new holes or guessing at dimensions—just swap it in and you’ve got dependable lighting that fits like the original.

Specs

Dimensions

  • Overall length: 3-1/2"
  • Overall height: 1-1/8"
  • Overall depth: 1-1/16"
  • Distance between mounting holes (center on center): 2-3/4"

Diagram showing dimensions of Peterson Thin Line Clearance or Side Marker Trailer Light, including length, height, and mounting hole spacing for accurate fitment reference.

Electrical

  • Bulb type: 194/193
  • Power draw at 12V: 0.25 amps
  • Voltage: 12V DC systems

Warranty

  • Limited warranty: 1-Year

Manufacturer Cross Reference

  • Grote #: 45253
  • Truck Lite #: 1555A
  • Optronics #: MC68AB
  • Primatronics #: PT2630A

Surface mount trailer light installation diagram showing how the light attaches flat against the trailer surface using mounting holes and hardware.

M136A Peterson Thin Line Clearance or Side Marker Trailer Light - Incandescent - Oval - Amber Lens - P2 Rated







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Ratings & Reviews

4.9

64 reviews
5 Stars
(58)
4 Stars
(6)
3 Stars
(0)
2 Stars
(0)
1 Star
(0)
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by:
I could not find a certain brand of marker light for my 1997 Ford F-350. I searched all over the Internet. Then I found etrailer.com in Missouri. I was surprised that they had this brand of light in stock. I ordered them on a Monday and had them installed and ready to go by Thursday!
etrailer.com had an excellent staff who deliver a quality and Professional Service. 5 Stars
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Larry M.

12/6/2021

Excellent product no problems whatsoever. Very happy

by:
Perfect replacement for Roadtrek 200 rooftop marker lights.
by:
Looked in all the local retail boat and trailer stores and could not find this specific marker light for my boat trailer. Finally located it on the etrailer online site within just a couple of minutes and placed my order. Received the order in just a couple of days and was pleased to see it was exactly what I needed to replace one which I had broken. I use etrailer.com for all my towing and trailer needs, boat and trailer, tent trailer and my Class C motorhome.
by:
These lights are exactly what I was looking for. great product with a quick delivery!!!
by:
Product is easy to install. Product delivery was excellent. I recommend Etrailer.
Frank profile picture

Frank

9/4/2023

The light was installed an a Winnable Rialta and has worked like the original light. Would recommend.

by:
I ordered the Peterson Thin Line clearance light because Winnebago doesn’t Lange that part any more. I was really only interested in the lens as my light works, but was missing the lens. After receiving the part today I snapped the lens on my vehicle it was a perfect fit. Now o have a backup light fixture in case any of my other clearance lights fail. I ordered the part on Wed. and it arrived on Fri. And I’m on the east coast.
by:
Direct replacement for the factory installed clearance 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:
First time ordering from etrailer. So far so good. Have not installed the product yet. Easy ordering and timely delivery.
by:
Hard to find running light lens cover was located and delivered in a timely fashion. Very pleased with response time, communication and overall customer service experience
by:
I couldn’t find a close match for the running lights on my 26 year old Winnebago Rialta - I found Etrailer and they suggested this product and it worked out great - great service , good price and quick delivery!
by:
Fit well and looked great to replace clearance light on Rialta motorhome.
by:
Old RV needs old parts. E-Trailer was best, if not only osurce of a perfect match.
by:
They are the exact replacements for my running boards. Very easy to install and always the right price at etrailer.
by:
Incandescent fixtures are getting hard to find. Etrailer always has what I need.
by:
Fast, efficient & most important matched existing marker light with missing lense
by:
Great products and great customer service and follow up!
by:
Great replacement for vintage RV
by:
Look to be a good construction but haven't had a chance yet to get them mounted and verify brightness of the light
by:
Great quality, good price and communications
by:
Quality products. Many choices.
by:
Perfect replacement for mine on Pleasureway RV
by:
Exactly what I needed and delivered quickly!
by:
Right item, God price, fast delivery.
by:
High quality product.
by:
good product good company
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See what our Experts say about this Peterson Trailer Lights

Do you have a question about this Trailer Light?
  • Solution for LED Thin Line Side Marker Trailer Light
    I do have a solution, but the Peterson Thin Line # 427400 doesn't have an LED equivalent. I could recommend a different light but that would require drilling new holes to get it mounted. What you can do instead is swap the bulbs to LED using the 194 LED Bulbs # ARC78FR. This will keep the same style and let you use your current holes for mounting. The one with broken lens will have to be completely replaced since there are no longer replacement lenses available.
    view full answer...
  • Replacement Clearance Lamps for 1999 Winnebago Rialta
    I have a solution for you, but because Winnebago does not have a company that they allow to make aftermarket lights for, we won't have an exact replacement for the Winnebago part # 113709-01-000. I recommend going with the Peterson Thin Line Clearance or Side Marker Light # 427400 . The dimensions on this light are 3-1/2" W x 1-1/16" L and 1-1/8" tall. Because these aren't recessed mounting lights you won't need to worry about the negligible size difference from your existing lights, as...
    view full answer...
  • Replacement Marker Light for 2007 Winnebago Access
    Unfortunately we do not have a lens or replacement light that meets the measurements of your 2007 Winnebago Access. I've attached the page links to our marker/clearance light options as well as to the oval light lens replacement options. Although lens # APL5AB is the correct style, it is not the correct size at 5-1/2 inches by 2-3/4 inches. Your best option is to replace the old light with a new one that may be a slightly different size. I recommend the Oblong Trailer Clearance, Side...
    view full answer...
    Image 1 for
  • Replacement Amber Running Light Lens For Winnebago
    I do have a solution for you but I was not able to find an exact replacement for the 1996 Winnebago Rialta running light lens measurements you provided. We do carry the Peterson lens part # 136-15A that measures 3-1/2" long x 1-1/8" wide x 1" thick which is the closest to yours in measurement. I recommend to replace the light on your Winnebago with Peterson Thin Line Clearance Light part # 427400 because since the trailer is older it is probably going to be difficult to find a perfect...
    view full answer...
    Image 1 for
  • LED Options For Replacing Peterson # 427400 Marker Lights On a Winnebago Rialta
    You are correct the Peterson # 427400 is only offered with an incandescent bulb. You do have the option of replacing your bulbs with some LED Bulbs # ARC68FR and then we also have the Lens # A68AB which can replace any of your cracked lenses. This will save you from having to remove all the lights and install new LEDs like the Optronics # MCL0030ABB.
    view full answer...
  • Does Peterson Clearance Light # 427400 Ground Through Hardware When Mounted to Fiberglass
    The trailer light part # 427400 does ground through the mounting hardware so if you mount it to fiberglass you'd need to run a ground wire from the light to a metal portion of the frame.
    view full answer...
  • Replacement Clearance Lights Needed for a Vintage Camper
    From the pictures you sent in I believe the Peterson Thin Line Clearance or Side Marker Trailer Light # 427400 is what you are needing. Peterson lights are very common on trailers so it is likely that this is the very light on your trailer. Attached is a photo showing the dimensions for you to compare with your current lights. This clearance light draws power with the single wire and it grounds through the mounting hardware.
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Mini Amber Clearance Lights And 3" Amber Clearance Lights
    I recommend the LED Mini Trailer Clearance and Side Marker Light - Submersible - 3 Diodes - Amber Lens Item # 47-99-006 as your mini lights and the Peterson Thin Line Clearance or Side Marker Trailer Light - Incandescent - Oval - Amber Lens Item # 427400 for your 3" lights. These are actually 3-1/2" lights because we do not offer a 3".
    view full answer...

Do you have a question about this Trailer Light?


Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Shane H
Test Fit:
Shane H
Employee Jonathan Y
Video by:
Jonathan Y
Employee Brian T
Updated by:
Brian T

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