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Mounting Bracket for Optronics 90 Series or 91 Series Trailer Lights - Self Grounding - Chrome

Mounting Bracket for Optronics 90 Series or 91 Series Trailer Lights - Self Grounding - Chrome

Item # A91CB
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Optronics Accessories and Parts - A91CB
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Chrome-finished mounting bracket lets you install an Optronics 90/91 series light. Surface mount on 2" centers. Light grounds through mounting hardware (sold separately). 1-800-940-8924 to order Optronics accessories and parts part number A91CB or order online at Free expert support on all Optronics products. Great prices and Fastest Shipping for Mounting Bracket for Optronics 90 Series or 91 Series Trailer Lights - Self Grounding - Chrome. Accessories and Parts reviews from real customers.
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  • Reviews (32)
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Optronics Accessories and Parts - A91CB

  • Trailer Lights
  • Mounting Hardware
  • Brackets
  • Optronics
  • Chrome

Chrome-finished mounting bracket lets you install an Optronics 90/91 series light. Surface mount on 2" centers. Light grounds through mounting hardware (sold separately).


  • Mounting bracket for Optronics A91, AL90, AL91, or AL191 Series trailer clearance/side marker lights
  • Gasket creates a weathertight seal
  • Surface mount - hardware not included
    • Light grounds through mounting hardware (sold separately)
  • Self grounding base should be used with single wire plug (A91LW - sold separately)
  • Chrome-finished plastic construction


  • Dimensions: 2-7/8" long x 1-1/2" wide x 1/2" deep
  • Distance between mounting holes (center to center): 2"
  • 3-Year warranty

dimensions of self grounding base

Bracket is a direct replacement for:

  • Uni Bond BM1020C
  • Wesbar 106293
  • Truck Lite 15409
  • Grote 43980
  • Peterson 150-102

A91CB Optronics Chrome Plastic Base for A91, AL90, AL91, or AL191 Series Trailer Clearance/Side Marker Light

Alternate part number: A-91CB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Mounting Bracket for Optronics 90 Series or 91 Series Trailer Lights - Self Grounding - Chrome - A91CB

Average Customer Rating:  4.8 out of 5 stars   (32 Customer Reviews)

Chrome-finished mounting bracket lets you install an Optronics 90/91 series light. Surface mount on 2" centers. Light grounds through mounting hardware (sold separately).


They work well. Replaced all my incandescent lights on trailer. Thank you.


The casing fits - now just need to retrofit the fender light to the truck.


Part was a perfect fit replacement
for my Heritage/Crownline boat trailer. Self-grounding bracket, 2 quick pop rivets or screws to install.

Item is still working fine!!!! Will buy again if ever needed.
Stephen L - 07/09/2020


Excellent part works perfect


Just what i needed, got here fast also !


I have been re-building some Vetter bags for my '82 Honda 900C and decided to add some rear lighting. I took a chance on etrailer and ordered 2 LED side markers. These folks are definitely into great customer service and fair prices. I admit I am spoiled from Amazon 2 day shipping, but I did receive my order in less then a week...not bad at all. I asked a question a few days after I ordered and got an immediate and friendly response. I installed my new lights on the left bag...they fit just as expected, and are very bright! I already ordered 2 more for the right side. Keep up the good work etrailer!


Part was exactly what I needed.

price and well organized Website.

Thank you I will be back!!!

Working great just what I needed!!
Larry S - 06/20/2017


Exact replacement for light brackets on the rear of my boat trailer. Made replacing the old ones quick and easy. About 5 minutes per bracket, including replacing the wire lead.


Perfect replacement for the market light housings on my boat trailer. No issues after a year of use but didn't expect any as these were exact replacement style for the originals.


great item works fine will buy again


Product was as advertised... The lights are already fitted to the trike attachment for my MC...

Product is still working fine... I am using the small LED clearance lights as brake and turn signal indicators on my add-on trike kit for my motorcycle...Very satisfied with the product and etrailer is my goto place for automotive and auxiliary lighting for my vehicles...
Les A - 02/10/2015


As always the employees at etrailer answered all my questions and even offered a better solution to my issue that was less money. everything arrived on time and as promised. it is a pleasure doing business with them


just what i was looking for to mount LED Clearance lights


Products delivered exactly as promised and advertised. Excellent support and service. Will be installing lights in the next few days.


Installed very easy. Looks good


What a great customer service deptment. Speedy fast and quick delivery. Thanks etrailer


Good quality. Performs as advertised.


This is exactly what we needed! Extremely helpful processing a return to get the 'right' part. Was good to not be treated like just another customer!


Great product and easy to install would recommend them and buy again


The product was delivered next day. Great prices and great customer service.


Great service and products. Always have been helped with any part and response is good.


Worked great


Worked great


The product arrived quickly and works g reat.



Show More Reviews

See what our Experts say about this Optronics Accessories and Parts

  • Options to Mount Optronics A91 and AL91 Series Lights
    The grommet # A91GB is inserted into a hole in your trailer. For a bracket to mount to the trailer you can use # A91BB, in black, or # A91CB, in chrome.
    view full answer...
  • Mounting Hardware for Optronics Mounting Bracket
    The Optronics Mounting Bracket # A91CB grounds through the mounting hardware. So whatever hardware you use, whether screws or pop rivets, make sure it's made of a conductive metal. The hardware we generally recommend is self-tapping screws # 1131832 but pop rivets should work just fine.
    view full answer...
  • Replacement Amber Mini Trailer Clearance Light For Wesbar 3395
    We have just what you are looking for. The replacement clearance light we offer is the Optronics Mini Rectangular Clearance Light, part # A91AB. This is an amber light that measures 2-1/2 inches long x 1-3/16 inches wide x 7/8 inch deep. This light requires the # A91LW pigtail to complete the wiring and a mounting bracket. The bracket is available in black, part # A91BB. For a chrome finish, use # A91CB.
    view full answer...
  • What Wiring and Accessories are Needed For Side Marker Trailer Light # A91AB
    The Sealed, Mini Rectangular Trailer Clearance and Side Marker Light, # A91AB, requires a pigtail and a mounting bracket. The pigtail is # A91LW. I have included a link to a video showing a typical installation for you. For a bracket, there are a couple of options. For black, use # A91BB. For a chrome finish, use # A91CB.
    view full answer...
  • Are Mounting Brackets Needed To Install Optronics LED Trailer Clearance Lights # AL91RB
    For installation of the Optronics LED Trailer Clearance Lights, part # AL91RB, you will need to use an Optronics Mounting Bracket. You can use either the Optronics Black Mounting Bracket, part # A91BB, or the Chrome Mounting Bracket, part # A91CB. The brackets are sold individually, so you will just need to order the same quantity as the number of lights you have. I have linked a video that show the installation of the Optronics AL91 Series Lights.
    view full answer...
  • How Does Clearance Light Included with Trailer Light Kit part # TL16RK Wire to Trailer
    The clearance lights of the # TL16RK are the part # A91AB with the bracket part # A91CB. The assembly grounds through the mounting hardware and the single wire part # A91LW that comes with it runs to the running light circuit of the trailer like you mentioned.
    view full answer...
  • Red Optronics Clearance Light Needed and Matching Chrome Mounting Bracket
    The Red version of the Sealed, Mini Rectangular LED Trailer Clearance, Side Marker Light # AL91CAB from Optronics is found as part # AL91RB on our site. The Chrome mounting bracket for both lights is part # A91CB and works with 90 Series or 91 Series Optronics lights.
    view full answer...
  • Looking for Boat Trailer Clearance Light to Replace Signal Stat 1500
    According to my Optronics representative, the # AL91RB marker/clearance light you mentioned is a direct replacement for the Truck-Lite 15 series. The Signal Stat 1500 is how Truck-Lite refers to the same lamp in its LED version. A mounting bezel is available, part # A91BB for black or # A91CB for chrome plated ABS. If either one of these self-grounding bezels is used, use a # A91LW pigtail. If a non grounding bezel or bracket is used, a two wire pigtail like part # A46PB would be needed.
    view full answer...
  • Replacement 2-1/2 x 1-1/4 Inch Amber and Red Trailer Clearance Lights and Chrome Base
    Based on your picture it looks like you are in need of some replacement lights and a bracket. It looks like you will need amber light # A91AB, red light # A91RB, and bracket # A91CB. And if you need the single wire (since the lights will ground through the bracket and mounting hardware) use # A91LW.
    view full answer...
    Image 1 for
  • Could Optronics Amber LED Trailer Turn Signals be Used as Motorcycle Turn Signals
    The Optronics Trailer Light # AL191AB that you referenced would make an excellent turn signal for your motorcycle. The LED diodes are very bright and should provide you with very visible turn signal. The chrome bezel to go along with it would be the Chrome Mounting Bracket # A91CB. This product would normally ground through the mounting bolts, but since you would be mounting this in a fiberglass bag you would need to ground it using an Optronics Single Wire Ground # A91LW. I attached...
    view full answer...
  • Parts Needed to Install Optronics Submersible Red LED Clearance and Side Marker Light AL91RB
    The Optronics Thinline Submersible Red LED Clearance and Side Marker Light # AL91RB installs using a base, part # A91BOB in black or part # A91OB in chrome finish. A 2-wire pigtail # A46PB will allow for electrical installation. The white wire on the pigtail is ground. If your original light used only 1 wire then its base provided the ground connection. In this case you can use the self-grounding base # A91BB in black or # A91CB in chrome finish. In this case you will use Single Wire #...
    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...
  • 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...
  • 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
  • Brackets and Wiring for Sealed, Miro Flex, Mini Thin Line LED Marker or Clearance Light # AL191AB
    We do have the parts you need to complete installation of the light. But first, sealed, Miro Flex, Mini Thin Line LED Marker or Clearance Light # AL191AB does not include a base or wiring harness. We have the compatible bases listed as related products on the right hand side of its product page. There is flush mount grommet, # A91GB Self-grounding black bracket, # A91BB Black bracket with open back, # A91BOB Chrome bracket with open back, # A91OB Self-ground chrome bracket, # A91CB For...
    view full answer...
  • Are Clearance Lights Needed on a Snowmobile Trailer
    To equip your snowmobile trailer with a basic lighting setup, you would need amber front side marker lights and red rear side marker lights. A basic trailer would require a minimum of two each, with the front lights as far forward as possible and the rear lights as far back as possible. The # TLK36RK trailer light kit includes the required amber front marker lights , but you could also add matching red clearance lights # A91RB with chrome bases # A91CB. I would also recommend using...
    view full answer...
  • Replacement Wiring Needed for a 6 x 10 foot Trailer
    We don't actually manufacture our wiring harnesses, but we do have some options available for you. You can use the Wesbar Wiring Harness # 002220 to replace the wiring on your 6 x 10 aluminum trailer. To complete the installation you will only need a Ring Terminal # DW05702-1 and Butt Connectors, part # DW05744-5 for 5 or part # DW05744-10 for 10. Just simply splice in the lights that you have into the wiring. If you don't already have lights then you can use the Trailer Light Kit #...
    view full answer...

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Info for this part was:

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