bing tracking image
  1. Trailer Lights
  2. Optronics
  3. Clearance Lights
  4. Rectangle
  5. LED Light
  6. Amber
Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber

Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber

Item # AL91AB
lowest price pledge
Our Price: $11.19
Trailer Lights
Orders above $99 qualify for Free Shipping
Shipping Weight: 0.05 lbs
In Stock
Optronics Rear Clearance,Side Marker Trailer Lights - AL91AB
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
2-1/2" x 1-3/16" Rectangle. Waterproof trailer light functions as both a clearance light and a side marker light when properly mounted. Requires mounting bracket and plug (both sold separately) for installation. Amber lens. PC rated. Lowest Prices for the best trailer lights from Optronics. Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber part number AL91AB can be ordered online at or call 1-833-496-1390 for expert service.
  • All Info
  • Reviews (1336)
  • Q & A (0)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - AL91AB

  • Clearance Lights
  • Rectangle
  • LED Light
  • Amber
  • 2-1/2L x 1W Inch
  • Surface Mount
  • Rear Clearance
  • Side Marker
  • Submersible Lights
  • Optronics

2-1/2" x 1-3/16" Rectangle. Waterproof trailer light functions as both a clearance light and a side marker light when properly mounted. Requires mounting bracket and plug (both sold separately) for installation. Amber lens. PC rated.


  • Small, rectangular trailer light functions as both a clearance light and a side marker light when properly mounted
  • Sonically sealed, waterproof housing and lens unit is submersible
  • LEDs make great replacements for incandescent lights
    • Last 50 times longer
    • More efficient - provide brighter light with less power output
    • No bulbs to replace - no brittle filaments
  • Polycarbonate lens and housing
  • Amber lens
  • Multiple mounting options
    • Surface mount with open-back or self-grounding bracket (sold separately)
    • Recessed mount with grommet (sold separately)
  • Accepts industry-standard 2-prong plug (sold separately)
    • Requires single-prong plug (sold separately) for installation with self-grounding bracket
  • DOT compliant
  • PC rated


  • Dimensions: 2-1/2" long x 1-3/16" wide x 7/8" deep
  • Diodes: 3
  • Power draw at 12.8 volts: 0.051 amps
  • Lifetime warranty on LEDs

Optronics light dimensions

Trailer light is a direct replacement for:

  • Uni Bond LED1225-3A
  • Truck Lite 15250Y
  • Grote 47083
  • Peterson M153A
  • Maxxima M20320Y

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 damage the diodes or circuit board.

PC-Rated Lights

Diagram of light spread for PC rated light

A PC-rated light produces a 90-degree angle of light to either side of its centerline for a total of 180 degrees of coverage. This beam pattern can be clearly seen when you are standing directly in front of the light, as well as when you are standing on either side of the light. When properly installed, this type of light can function as both a front clearance light and a side marker light or as a rear clearance light and a side marker light.

AL91AB Optronics Thin Line Mini LED Side Marker/Clearance Trailer Taillight - PC Rated - Amber

Alternate part number: AL-91AB

California residents: click here

Customer Reviews

Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber - AL91AB

Average Customer Rating:  4.9 out of 5 stars   (1336 Customer Reviews)

2-1/2" x 1-3/16" Rectangle. Waterproof trailer light functions as both a clearance light and a side marker light when properly mounted. Requires mounting bracket and plug (both sold separately) for installation. Amber lens. PC rated.


Exact replacement for 2008 Skeeter (easy loader) trailer

Larry - 08/06/2022


Boat Trailer: Following a highly successful conversion of the brake/tail & DOT lights, I went ahead with changing the amber running/side maker lights. Working with Hally made ordering smooth and simple. The parts arrived via USPS as expected in excellent condition.
The new LEDs fit perfectly into the OEM housing, so I chose not to change them at this time. THe difference in illumination is just outstanding!!!
I will definitely use eTrailer again with two great experiences on this project.
Seeing the outcome, I cannot explain why it took me so long to decide to convert.

After a year and around 2500 miles, the lights continue to perform flawlessly. It was a good decision to convert to LEDs and I will not wait as long should there be a next time.
John - 09/20/2019


I use these on my boat Trailer. They are easy to install and work well. Seem to be well sealed against water damage.

Still holding up well after a year of use. No problems.
Michael - 08/17/2022


Easy to install and looks to be a exact replacement for the factory installed running lights on my boat trailer.

Light is still working great, would buy again if the need arises.
Stephen L - 07/09/2020


Plugs in the back don't line up. No problem, return them for the correct ones. etrailer wants to charge me $XX.00 to ship back an item that's less than a lb and ships in a small paper envelope. I could have used [online] and will next time.

You are not required to use the label that we send to return the lights. You can use any method that you find that is less expensive. We just ask that you print out the paper work and include it with your return. It is best to use a method that is traceable.
-- Etrailer Expert Jenny N - 03/04/2022


Perfect fit! I was extremely worried that I would have to endure a lot of modification due to the age of my trailer, but found exact replacement parts.


Best light. I put new standard lights on and the first trip the bulb vibrated out. Since the light was sealed, I could not reinstall the bulb, so it was useless. Put these LED light in and they fit perfectly, connected exactly the same, we’re bright, and handled bumpy gravel roads without issue. Still functioning perfectly and I will always use these from now on.

Still working flawlessly
Tom - 11/02/2021


Light is awesome, only downside is the size of the hole you need to drill in order for the connector to fit in the frame or body


Products fit was exactly as described, price was fair as compared to other products of lesser quality.
Good job etrailer!


Much brighter light from all viewing angles than the OEM lights. Easy snap in replacement if it ever fails. The self grounding one-wire base would have made my install easier. The two prong plug I ordered was a tight fit but it worked.

I would recommend etrailer.


I had a heck of a time finding this side marker light and as it fit into a specific rubber mount (by another manufacturer) which in turn fit into a specific opening in the trailer's fender and the original light was marked by yet another manufacturer (who no longer makes this model) I was VERY glad to discover Optronics made a perfect replacement. It was exactly as described and fit perfect! The best part is it lights up beautifully! Thanks etrailer, you saved the day!!

Still working fine after being submersed numerous times.
Roger B - 08/21/2015


Item continues to work as intended.


I'm very pleased with these LED replacement lights for the fenders on my cargo trailer.
Before these I had the regular light bulb which I had to replace from time to time. So the last time I needed to replace a bulb about a year ago I decided to go with these LEDs.
Wow what a difference in their brightness.
Before changing to LEDs my lights on the fenders were somewhat dim. Now with the LEDs these lights are bright enough for other divers to see them in the daylight giving me some peace of mind that they see me coming.
There is however one con to them being so bright.
When I have to back my trailer into the driveway at night their brightness blinds me from seeing my wife in back of the trailer guiding me in when using my review mirrors.
But it's OK because now I will just get some LED backup lights for the trailer.
I plan on changing the entire trailer over to LED lights, someday. lol
PS. I love

Its been a year of having these lights on my cargo trailer and Im still loving them. Nice and bright to warn other drivers either in front of me or in back of me the width of my trailer coming down the road. I run them day and night and 99 of all drivers coming head on at me I see they pull over just a little to widen the gap between us as we pass each other. I have a cargo trailer with fenders mounter outside the trailer with a little black plastic rubbery housing that holds the lights. I put the amber light facing forward and the red light facing backwards. Just take the black housing off the fender then pull out the old and install then new. Was a good time to clean up the ground wire connection while I was there too. Took 10 minutes or so per side. Theyre awesome. Getchya some here at etrailer.
Scott F - 02/26/2021


Easy install, way brighter than the previous LEDs I replaced.


First of all let me say but I was kept informed of where my package was and it arrived on time and was all complete and good condition well packed although I had made a mistake and had to return it it just took a simple phone call. I did have to wait a few minutes but it was taken more care of they even took the replacement order right then I had just ordered the wrong things and I had to replace.I’ve dealt with them before, because I
have three trailers

They are great they were a perfect fit and they are LED Which means I won’t have to mess with them for years
Lee - 08/18/2021


It looks really nice now with the Sealed, Mini Rectangular LED Trailer Clearance, Side Marker Light.


Products arrived on time and in perfect condition. I really liked the personal email communication regarding the order progress and tracking.


Great product


They look good. Wish it was packaged be tter.


Right product.


My order arrived very quick and it was a perfect fit. Would order from etrailer again.


Good quality, easy to install. A bit overpriced and shipping was slow but overall good.


Great product, price and rapid ship.
ask for more.


Perfect fit. One worries that parts for an older trailer will not be available or will not fit. Very fast shipping - in fact, I got an email saying they could ship even faster with an almost identical part. I declined and it still came in a couple of days.


I installed the side marker and have used the boat trailer several times since installing and they are still working great

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Replacement Rectangular Amber 2-1/2 Inch Long by 1-1/2 Inch Wide Clearance Lights
    The “SAE P2PC 98” you provided is a code used by the department of transformation and will not have any bearing on the correct replacement. In order to determine the correct replacement I would need you to either A) remove the lens and find the part number inscribed on the base or B) send me a dimensional photo of the light.
    view full answer...
    Image 1 for Image 2 for
  • Replacement Marker Light for 2011 Tiffin Open Road Motorhome Mirror
    The # A91AB Optronics Trailer Clearance and Side Marker Light will work as a replacement for your current marker light. This has the same 2-1/2" x 1-3/16" dimensions as your current light and accepts the standard 2-prong plug which would be the the 2-pin connection you are describing. This has light has the same two tabs you mentioned on each end to fit in your mounting bracket. If you would like to replace both lights there is also an LED option which is the # AL91AB Thinline LED Clearance...
    view full answer...
  • How to Select Replacement Trailer Lights
    Trailer light part numbers are usually found on the base of the light, rather than on the light lens. If you can find a part number on the base you can search our site by entering that number into our search box. The codes on a lens are often DOT numbers rather than actual manufacturer part number. We do carry many brands of trailer lights, including lots of Optronics products, and the page I linked for you will let you select the type, size, brand and color of light you want. All you...
    view full answer...
  • Replacement Front Clearance Lights Needed for 1996 Tiffin Allegro
    It's kind of hard to tell exactly what lights will work for your 1996 Tiffin Allegro, but I think something like the 2-1/2" x 1-3/16" Thinline LED Clearance and Side Marker Light # AL91AB should do the trick. If your lights have different dimensions then I've linked our selection of replacement amber lights that you can filter through, or you can take some measurements and send those in with some close up pictures of the lights that I can use as a reference.
    view full answer...
    Image 1 for
  • Replacement for Truck-Lite Signal-Stat 1500 Clearance Light
    The Thinline LED Clearance and Side Marker Light part # AL91AB for amber or part # AL91RB for red will be direct replacement options for a Truck-Lite Signal-Stat 1500. It should allow you to use the existing bezel.
    view full answer...
  • What Replacement Amber/Red Side Marker Lights Fit My Boat Trailer?
    I have a solution for you. After much research, the Optronics brand is the closest we have to the dimensions you are looking for. You are absolutely correct that the Optronics lights have a bit wider dimensions than your lights. The # AL91RB and the # AL91AB measure 2-1/2" x 1-3/16" x 7/8". With that being said, it is often much easier to replace the lights altogether than to look for an exact match of replacement lens. For the full units, I recommend the # AL82RB and the # AL82AB. These...
    view full answer...
  • Is the Peterson Clearance and Side Marker Trailer Light Offered with Female Terminals
    It sounds like you are looking for the Thinline LED Clearance and Side Marker Light part # AL91AB which has female terminals in the rear but a better option for you would be to just replace the pigtail with the Peterson Right Angle 2-Wire Marker Light Plug part # 153-49.
    view full answer...
  • Troubleshooting Trailer Wiring Blowing Fuses
    While we have no specifics on wiring for any make or model of trailer and can only generalize it does sound like something very simple - you have overloaded your running light circuits which is causing the fuse to blow, and the reason for that is almost always because you are using incandescent lights as opposed to LED lights. If this is the case, which I'm guessing it is because it is the most common, you will need to switch out at least your running lights to LEDs, and can do so cost-effectively...
    view full answer...
  • Replacement Tail and Marker Lights for 1996 Ranger Trail Boat Trailer
    Excellent idea, switching to LED. They use less power, last much longer and are brighter than incandescent lamps of the same size. Win, win, win. The grommet mount lamps you reference should fit in a 6-3/4 by 2-1/2 inch rough opening, which is the typical size. I'd recommend measuring the rough opening to confirm. If that dimension checks out, the # TLL12RK LED taillight kit would work well for you. For the marker lights, if the interior of their mounting brackets measure 2-1/2 by 1-3/16...
    view full answer...
  • LED Clearance Light Recommendation for Sundowner Horse Trailer
    What you have on your horse trailer is a pretty common clearance light that we do offer in red and amber as an LED. For the red you'd want the part # AL91RB and for amber part # AL91AB. You'll also need the grommet part # A91GB and the right angle pigtail part # A46PB and you'd be set.
    view full answer...
    Image 1 for
  • Incandescent Trailer Clearance Light that Uses 2 Wires
    In red you'd want the part # AL91RB or in amber you'd want # AL91AB for the submersible incandescent lights. For a two wire harness like you need you'd want the part # A46PB with grommet part # A91GB or bracket # A91BOB.
    view full answer...
  • Recommended Wiring and Bracket for an Optronics AL91AB
    We definitely have the wiring and brackets needed to get you up and running. With that being said, you will need the Right Angle 2-Wire Pigtail # A46PB and the Mounting Bracket for Optronics AL91 # A91BOB. The # AL91AB lights will snap into the # A91BOB and then the # A46PB will plug directly into the back.
    view full answer...
  • Replacement Clearance Taillight Solution for EZ Loader 250-032130
    I looked up your EZ Loader part number and it appears to be the same design as the part # AL91AB which for the matching grommet you'd then need the part # A91GB. You'll also need the wiring harness # A46PB.
    view full answer...
  • Does The Optronics LED Side Marker Light # AL91AB have 2 Male Connector Posts
    Yes, The Thinline LED Clearance and Side Marker Light # AL91AB has 2 male connector posts on it. This waterproof trailer light functions as both a clearance light and a side marker light when properly mounted. It is 2-1/2 inches long by 1-3/16 inches wide by 7/8 inches deep. The Right Angle 2-wire pigtail # A46PB and The Mounting Bracket # A91BOB are sold separately. I attached a review video link below.
    view full answer...
  • Replacement Fender Solution for 2005 Crestline Trailer
    I looked up the Shorelandr fender SK0329-01 and our closest option is the Fulton fender part # F008574 which measures 9-5/8" Wide x 42-5/8" long x 12-3/4" tall. To add clearance lights to this you'd need the part # AL91AB for amber lights, part # AL91RB for red, part # A46PB for pig tails, and for grommets # A91GB.
    view full answer...
  • Recommendations For Adding LED Marker Lights To A 20 Foot Cargo Mate Trailer
    You are correct. Red lights should always be as close to the rear of the trailer as possible. With that also said, if you wanted to use something like the Optronics Thinline LED Trailer Fender Light w/ Bracket # MCL67ARB on the fender, you will want the red light pointed towards the rear of the trailer and the amber light pointed towards the front of the trailer. If you do not already have the lights picked out, the Optronics Thinline LED Clearance and Side Marker Light # AL91RB (Red)...
    view full answer...
    Image 1 for Image 2 for
  • How to Determine if Amber Clearance Light Will Work on Trailer
    In order to determine if the Thinline LED Clearance and Side Marker Light # AL91AB will fit your trailer you simply need to measure your light and see if it matches; this light is 2-1/2" long x 1-3/16" wide x 7/8" deep. It is also a great option because it can be either recess or surface mounted. For a surface mount you will use Self-Grounding Mounting Bracket # A91BOB with Plug # A91LW. For a recess mount you will use Grommet # A91GB with Right Angle 2-Wire Pigtail # A46PB. I have added...
    view full answer...
  • Will LED Clearance Light Work With One Wire
    Yes, the Thinline LED Clearance and Side Marker Light - Submersible # AL91AB will work with your single power wire, as it uses a 2-wire (one for power, one for ground) pigtail or 1-wire pigtail with a self-grounding bracket. To mount this light you have a couple options. The first is the Mounting Bracket # A91BOB with Right Angle 2-Wire Pigtail # A46PB; you'd also want to use the Self-Tapping Screw # 1131832. Your other option to mount this light is to use Self-Grounding Mounting Bracket...
    view full answer...
    Image 1 for
  • Is There a Difference Between the F008584-2 and the F008594-2
    Yes. The only difference between the Fulton # F008584-2 and the Fulton # F008594-2 is the color. Both of these step fenders are designed for 14" wheels. If you need mounting brackets you can use the Mounting Brackets for Trailer Fender - 13"/14"/15" Wheels - Galvanized Steel - Qty 2 # CE26098G-2 and you can add clearance lights on these fenders with the Thinline LED Clearance and Side Marker Light - Submersible - 3 Diodes - Rectangle - Amber # AL91AB (LED) or # A91AB (incandescent). I've...
    view full answer...
  • Upgrading Lights on 2000 Tracker PT175 Trailer to LED
    We do offer a wide variety of replacement lights for trailer but since trailer manufacturers don't keep a record of what they use on trailers I would need some pictures of the lights you are wanting to replace along with some measurements so I can be sure to recommend the correct parts.
    view full answer...
    Image 1 for Image 2 for Image 3 for Image 4 for
  • Wiring Pigtail and Mounting Bracket Options For Installing Thinline LED Clearance And Marker Lights
    The Thinline LED Clearance and Side Marker Light # AL91AB require certain mounting brackets and plugs that are either already installed on the trailer or are available separately. A Right Angle 2-Wire Pigtail # A46PB will work with the Grommet # A91GB if you are looking to recess the light. Or Mount Brackets # A91OB and # A91BOB if you want to mount them on a surface with the wiring running behind the bracket. The Plug - Single Wire # A91LW is used for Mounting Brackets # A91BB and...
    view full answer...
  • Replacement Clearance Lights For a 2017 Skeeter Boat Trailer
    Looking at images for a 2017 Skeeter boat trailer it appears they use the Mini Clearance/Side Marker Light # TN96MR on the rear of the trailer to fit into a 3/4" hole. And the Thinline LED Clearance and Side Marker Light # AL91AB just in front of the axles. This is a recessed style light that is 2-1/2" long x 1-3/16" wide. It is designed to fit in a Grommet # B150-181 or on a Mounting Bracket # 150-13. We also have Angled Grommet # A91GZB as this is what your trailer appears to use.
    view full answer...
  • Availability Of White Replacement Fender For 2003 Shoreland'r Trailer W/ ST205/75R15 Tires
    I sure can! Based on the picture you provided the correct replacement fender for your trailer is going to be the Plastic, Single-Axle Trailer Fender w/ Top and Side Steps - White - 13" to 15" # PF11X35W which will work perfectly with the ST205/75R15 tires on your 2003 Shoreland'r Trailer and closely resembles your current fender. You will also need mounting brackets # PF1135-BKT-2 to mount the fender to your trailer. In regards to the clearance lights I will need to know the length...
    view full answer...
    Image 1 for Image 2 for
  • Replacement Fender for Single Axle Escort Boat Trailer
    The only white fenders we have that will fit your 15" wheels are the # PF11X35W-2. We also have reports that this was a match for a 2000 Escort boat trailer, so it is likely this is the same part. If you decide you only want to place the one fender we do have a single fender available as well # PF11X35W. We don't have the same mounting bracket style so you would need the # PF1135-BKT-2. The mounting holes on the brackets are 3-5/8" apart so you would need to acquire U-bolts from your local...
    view full answer...

< Previous

Do you have a question about this Trailer Light?

  • Why

    At we guarantee:
  • Highest quality trailer lights for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer light information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jeff D
Expert Research:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Patrick B
Video Edited:
Patrick B
Employee Jacob T
Video Edited:
Jacob T
Employee Laura H
Updated by:
Laura H
Employee Amy B
Updated by:
Amy B
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T
Employee Hannah L
Updated by:
Hannah L
Employee Noah M
Updated by:
Noah M
Employee Dustin K
Video by:
Dustin K
Employee Jonathan Y
Video by:
Jonathan Y
Employee Cole B
Installed by:
Cole B
Employee David F
Installed by:
David F
Employee Shane H
Test Fit:
Shane H

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.