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Mounting Bracket for Optronics A91, AL82, AL90, AL91, or AL191 Series Lights - Open Back - Black
Optronics

Mounting Bracket for Optronics A91, AL82, AL90, AL91, or AL191 Series Lights - Open Back - Black

Part Number: A91BOB
In Stock
$9.69
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Black plastic bracket lets you install an Optronics A91 Series, AL82 Series, AL90 Series, AL91 Series, or AL191 Series trailer light. Surface mount on 2" centers - hardware sold separately. Open back allows room for wiring. 1-800-940-8924 to order Optronics accessories and parts part number A91BOB or order online at etrailer.com. Free expert support on all Optronics products. Great prices and Fastest Shipping for Mounting Bracket for Optronics A91, AL82, AL90, AL91, or AL191 Series Lights - Open Back - Black. Accessories and Parts reviews from real customers.
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  • Reviews (125)
  • Q & A (0)
  • Videos (2)
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Optronics Accessories and Parts - A91BOB

  • Trailer Lights
  • Mounting Hardware
  • Brackets
  • Optronics
  • Black

Black plastic bracket lets you install an Optronics A91 Series, AL82 Series, AL90 Series, AL91 Series, or AL191 Series trailer light. Surface mount on 2" centers - hardware sold separately. Open back allows room for wiring.


Features:

  • Mounting bracket for Optronics A91 Series, AL82 Series, AL90 Series, AL91 Series, or AL191 Series trailer clearance/side marker lights
  • Gasket creates a weathertight seal
  • Surface-mount design - hardware sold separately
  • Open back allows room for wiring
  • Two-wire harness for light sold separately
  • Black molded plastic construction


Specs:

  • Dimensions: 2-7/8" long x 1-1/2" wide x 1/2" deep
  • Mounting hole dimensions (center to center): 2"
  • 3-Year warranty


dimensions of open back base


A91BOB Optronics Black Plastic Base for A91, AL82, AL90, AL91, or AL191 Series Trailer Clearance/Side Marker Light

Alternate part number: A-91BOB




California residents: click here


Video of Mounting Bracket for Optronics A91, AL82, AL90, AL91, or AL191 Series Lights - Open Back - Black

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




Video Transcript for Optronics Lights Mounting Bracket Installation

Shane: Hey. Hi, Shane here with etrailer.com. Today we're going to be taking a look at Optronics mounting bracket for Optronics A Series lights. This is what our bracket's going to look like when it's installed. It's going to be a very durable plastic construction. It's going to be a surface mount.

It's going to have a foam backing to help seal the backside of the light. It's going to have an open back. Allow you to run your lights or run your wires from your lights much easier. It's going to allow you to snap your light into place. These are also going to be available in chrome.

These are designed to work with A91, AL82, AL90, AL91 or AL191 Series lights. You can find each one of those lights here at etrailer.com. Keep in mind mounting hardware is not included with this light. Again, with this bracket, the light is just going to snap into place. Makes it very easy to attach and detach the light.That's going to do it for our look at Optronics mounting bracket for A Series lights..

Customer Satisfaction Score:

Ratings & Reviews

4.7

125 reviews
Black plastic bracket lets you install an Optronics A91 Series, AL82 Series, AL90 Series, AL91 Series, or AL191 Series trailer light. Surface mount on 2" centers - hardware sold separately. Open back allows room for wiring.

by:

Perfect fit, 2001 Shoreland'r boat trailer, absolutely no drilling, lined up with factory holes.



by:

I consider this plastic base to be over priced.

Joe profile picture

Joe

7/30/2025

Product is working as expected, no issues.



by:

Great service as always!



by:

Works fine- needs a deeper strand of so the wire plug does not hit the trailer frame



by:

Worked great with the Amber LED side marker lights.



by:

Great quality fast delivery… very happy with ETrailer



by:

Good quality and exactly what I needed



by:

You wouldn't think something like getting replacement running lights would be that complex but frankly it is. With the various options and manufacturers its a nightmare. After searching the desert of the internet for correct information I stumbled upon this oasis of information from etrailer to get the right lights and mounting brackets. I now understand what the "e" stands for in their name, they make trailer stuff "easy".



by:

I've always had good luck when I buy from etrailer. I've been working on my boat trailer and small utility trailer and purchased items for both. I'm very happy with the products so far. I've installed everything that I bought, but it's impossible to send any pictures because both trailers are covered and put away for the winter. Keep up the great work.



by:

seems like just last week I was saying how much i liked the led lights and where would they be without the mounting brackets? its all good and thats the truth!
me so happy ;-)



by:

I purchased these as more of an insurance policy when I changed out the lights on my Shoreland'r trailer. I wasn't sure if the new lights would fit into the existing housings. They fit perfectly!. These brackets have the same mounting hole pattern and dimensions as the stock trailer housings, so when I decide to change them out, it will be a breeze!!



by:

Purchased fenders from etrailer. Selection was great, priced competitively and shipping quicker than expected. Also purchased marker lights, which were easily installed in fenders.



by:

The mounting brackets are well made and very durable. I like the Open Back design as it allows clearance for the electrical connector. I also liked the foam backing as it made a good, clean seal/finish on the final project.

I mounted them on my boat trailer using #8 stainless hardware without issue. I have a black trailer and these matched nicely!

I would buy again!



by:

mounted to hold Optronics Mini Thinline LED clearance lights



by:

The light I ordered are excellent. I replaced all the lights on my boat trailer to LED. The first trip to lake with the boat, got many comments from other boat owners at the lake. I told them about etrailer. I know they will be as satisfied as I am. Thanks etrailer.

From now on I will buy all my stuff from etrailer!!!




by:

Disappointed that the mounting bracket and pigtail were sold separately. Also the pigtail protrudes beyond the surface of the mounting bracket,creating additional work in mounting.



by:

I friend told me about etrailer.com a couple of years ago and for that I'm grateful. I can locate any obscure light for my trailer and have it shipped to my door! This saves a lot of time from shopping local stores when I'm trying to locate a part. The prices are less than my local stores too!



by:

I ordered these plastic mounts to replace the factory marker light mounts on my SnoLandr snowmobile trailer. I found these on the etrailer site and they were very similar. Thank you guys



by:

Everything was received exactly as described, and on-time. I had a few questions since we were in the middle of a hurricane, and Angie responded quickly and thoroughly. Etrailer is definitely my go-to for trailer-related products from now on!



by:

I have to say it's an absolute pleasure dealing with etrailer. Not only did my package arrive on time as promised but the experience of dealing with the people at etrailer such as Tommy and Dani made it that much more of fun experience. There was not a problem with answering my questions if they did not know the answer they found out the answer and got back in touch with me. Their prices are great their products are good quality and there's so many good things to say about the company that I could go on and on. Keep up the good work and I will be doing all my trailer business with etrailer. Just check out their website and see how much more they have to offer.



by:

Received my new lights and harness on time and nicely packaged. There was a mix-up with the harness and Stacey took care of it immediately. Thanks for great customer service!



by:

God I love these replacement lights ! they fit my Trailstar trailer perfect . Do you have the little ones for corner by the tires ? If so I will take them too.



by:

This is so great and so logical to me to ask a question to a client a year later. Most of the enterprises would ask this question in the first week. If you buy something, most of the time you will be happy a week later.

I love what I bought and it is still working great. Your email remembers me to buy everything for my trailer from you.



by:

The materials order were great! My order Was processed quickly and arrived promtly. Will Continue to go Etrailer for my Material needs.



by:

Wish I had read more, it doesn’t come with any of the plastic thumb darts to mount it to the fender.


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Show More Reviews

See what our Experts say about this Optronics Accessories and Parts

  • 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...
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  • Recommended Side Marker Lights for EZLoader Trailer
    I can help you find the correct parts for your EZ Loader trailer. Based on the photos you submitted, the # AL91RB will fit your style connector on your trailer. The amber light is # AL82AB, and the grommet you will need is # A91BOB. All these items come in quantity of 1 so you will want to adjust the quantity on the grommets page to 2. I have linked all the above products to this page for your convenience.
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  • Does Optronics Clearance Light A91RB with Base A91BOB Have Clearance for 90 Degree Mount
    Hey Jim, yes the Mounting Bracket # A91BOB with the clearance light part # A91RB would allow a right angle pigtail like the part # A46PB to fit and have enough clearance.
    view full answer...
  • Availability of Mounting Bracket for Thinline LED Clearance and Side Marker Light AL91AB
    Hey Jim! The Thinline LED Clearance and Side Marker Light - Submersible # AL91AB is an AL91 series light so you can choose from the following: -Mounting Bracket for Optronics A91, AL82, AL90, AL91, or AL191 Series Lights - Open Back - Black # A91BOB -Grommet for Optronics A91, AL82, AL90, AL91, or AL191 Series Trailer Lights - Black PVC # A91GB -Mounting Grommet w/ Built-in Wedge for A91 or AL91 Series Lights - Black # A91GZB
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  • What Size/Length Of Self-Tapping Screw For Mounting Marker Light Bracket?
    Hello. So there is not a specific screw recommended based on a make and model of camper but if you are trying to mount a marker light bracket like part # A91BOB, a 1/4" - 14 x 3/4" long self tapping screw like part # FA1131822 would work just fine.
    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...
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    Image 1 for Image 2 for
  • Replacement Trailer Clearance Light for PM150
    The most similar trailer clearance lights we offer to replace the PM150 lights you have now would be the Thinline LED light part # AL91RB. For a replacement harness that would plug into this you'd need the part # A46PB and then for a grmmet part # A91GB for a flush mount or part # A91BOB for a bracket for surface mount.
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    Image 1 for
  • Difference Between Optronics Lights AL90RB and AL91RB
    The Optronics FLEET Count Mini Thinline Sealed LED Marker/Clearance Light # AL90RB has a single LED element while the similar Thinline LED Clearance and Side Marker Light # AL91RB has three LEDs for brighter output and it is submersible. Both can mount using either grommet # A91GB or bracket # A91BOB.
    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 Optronics Clearance/Marker Lamps to Replace Peterson PM152
    The Optronics # AL82RB would work as a replacement for the Peterson PM152 lamp, but from what I found on Peterson's website, the PM152 features two prongs on the back which is more like the # AL91RB from Optronics. Either would work for you, but I'd use the # AL91RB, assuming you have the 2-wire pigtail like # A46PB already wired up on your trailer.
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  • 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.
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  • 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)...
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    Image 1 for Image 2 for
  • Clearance and Side Marker Light With Clear Lens and Red LEDs
    We do carry a number of options for clearance lights that have a clear lens and red LEDs, but the red equivalent of the Thinline LED Mini Clearance and Side Marker Light - Clear Lens - Amber # AL91CAB has a red lens as opposed to a clear lens; it is the Thinline LED Clearance and Side Marker Light # AL91RB. If you want to go this route you can mount it with Grommet # A91GB (recessed mount) or Mounting Bracket # A91BOB (surface mount) with Right Angle 2-Wire Pigtail # A46PB. For similar...
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  • Replacement 2-1/2 Inch Long Optronics Marker Lights for Cargo Trailer
    The closest Optronics trailer light assembly we have available to your existing unit is the Optronics Thinline LED # AL91RB. This LED light measures 2-1/2 inches long and 1-3/16 inches wide. The mounting bracket # A91BOB it is used with (not included with the light) features bolt holes that measure 2 inches apart on center. Unfortunately the SAE P2 P3 number you found on the lens of your existing light doesn't indicate the actual light model but has to do with DOT regulations. If the...
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  • How Does Part A91BOB Mount To The Trailer and Are The Lights It Holds Submersible
    I have a solution for you, but we don't have any clearance lights that would mount with the white bushing you're referring to. If you went with the # AL191AB and # AL191RB like you mentioned you would need the # A91BOB mounting plates to mount them onto your trailer. These can be secure with a nut/bolt or with a self tapping screw into the trailer frame and you can use the same size screw/bolt as the bushings to make sure it's a secure connection. You will also need the 2 Wire Pigtail #...
    view full answer...
    Image 1 for
  • Availability of Truck Lite Model 15 Light Base Replacement
    I looked up the Truck-Lite 15 light and found that it's basically the same as the Optronics Mini Thin Line clearance lights like the part # AL91AB. Which we have a black base part # A91BOB and a chrome base part # A91OB for but we do not have a white one.
    view full answer...
  • Are Optronics LED Lights Quality Lights
    Lights like the # MCL31AB and # MCL31RB are cheap but that is the nature of a small clearance light in this style. I wouldn't really expect better performance from any other brand. I know it happens, but we don't really see complaints about the lights burning out. Optronics lights are backed by a lifetime warranty on the LEDs so a light like your # BUL52CB is covered under and can be replaced. For the clearance lights I would try switching to the Thinline LED Clearance and Side Marker...
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  • 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...
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    Image 1 for
  • Optronics Trailer Clearance Light Similar to AL 91RB that Installs With Smaller Hole Drilled
    The Optronics clearance light part # AL91RB in all of it's configurations would require a hole to be drilled for a harness like the part # A46PB to install with a grommet like the part # A91BOB. There isn't a way to mount it flush without drilling. If you used the part # MCL67RBCB instead though it would require a much smaller hole be drilled since the entire harness of the other setup gets ran through the hole.
    view full answer...
  • What Hardware is Best for Mounting Trailer Light Mounting Bracket to the Trailer Surface
    It depends on the material of the trailer surface you are wanting to mount it on. You could use screws on wood surfaces, self-tapping screws for sheet metal, or nuts and bolts would work on sheet metal. To remove the old ones, you can drill out the rivet, or they may be plastic pop-in rivets that you may be able to pry out with a screw driver.
    view full answer...
  • Looking for LED Version of # AL91RB Mini Rectangular Clearance/Side Marker Lamp
    You bet we do! For the LED version, you'll need part # AL91RB. The lamp can be grommet mounted using # A91GB or surface mounted using a self grounding base like # A91BB for black/ # A91CB for chrome or a standard base like part # A91BOB for black/ # A91OB for chrome. If you use a self grounding base, use the single wire pigtail, part # A91LW or for the standard base, use the two wire pigtail, part # A49PB.
    view full answer...
  • How Does the Flush Mount Grommet # A91GB Install a # AL91AB Light Into a Trailer
    All the parts you ordered are designed to work together, but the grommet part # A91GB is for flush mounting the Optronics Light part # AL82AB that you have. This grommet will get installed into a hole in on your trailer that is about 2-7/8 inches across and 1-1/2 inches tall. If you do not have a hole with those dimension you might be better served getting a Black Mounting Bracket # A91BOB to allow you to surface mount the # AL82AB.
    view full answer...
  • 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...
  • Does Light Bracket # A91BOB Fit LED Taillight # LPL91CB
    Yes the bracket part # A91BOB is compatible with the LED light part # LPL91CB that you referenced.
    view full answer...


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Do you have a question about this Accessories and Part?


Info for this part was:

Employee Patrick B
Expert Research:
Patrick B
Employee Jameson C
Expert Research:
Jameson C
Employee Adele M
Updated by:
Adele M
Employee Laura H
Updated by:
Laura H
Employee Amy B
Updated by:
Amy B
Employee Brian T
Updated by:
Brian T
Employee Noah M
Updated by:
Noah M
Employee Cole B
Installed by:
Cole B
Employee Chris R
Video Edited:
Chris R
Employee Shane H
Test Fit:
Shane H
Employee Jonathan Y
Video by:
Jonathan Y

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