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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A91CB - Mounting Brackets Optronics Accessories and Parts
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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). Call 800-298-8924 to order Optronics accessories and parts part number A91CB or order online at Free expert support on all Optronics products. Guaranteed Lowest Price 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.
  • All Info
  • Reviews (17)
  • Q & A (16)
  • Videos (1)
  • Photos
  • Why etrailer?

Optronics Accessories and Parts - A91CB

  • Trailer Lights
  • Mount Parts
  • Optronics
  • Mounting Brackets
  • 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

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

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

Video Transcript for Review of Optronics Trailer Lights - A91CB

Today we're going to take a look at the chrome self grounding mounting bracket for the Optronics 90 series or 91 series trailer lights. Now this mounting bracket is for the Optronics A91, AL90, AL91, or AL191 series trailer clearance side marker lights. The marker lights will just pop right into place. Does have this foam gasket on the back, which creates a nice weather tight seal. It is a surface mount design. Now the hardware to install this is not included.

And you can see here the light does ground through the mounting hardware, which we do sell separately. So when you push your light in there and it snaps into place. One of the pins goes right into this hole here and you can see it has a metal piece connects over to where you're going to mount this. So it will ground through the mounting hardware.The self grounding base should be used with a single wire plug, which we do sell separately. It's part number A91LW and it's listed on this product page as a related product.

It is a chrome finished plastic construction. Few dimensions on this. Overall length one end to the other is two and 7/8 inches long. The width on it is going to be right at one and 1/2 inches wide. Total depth front to back is half an inch.

And the distance between the two mounting holes center to center is right at two inches. But that should do it for the review on the chrome self grounding mounting bracket for the Optronics 90 series or 91 series trailer lights.

Customer Reviews

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

Average Customer Rating:  4.9 out of 5 stars   (17 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).

- A91CB

just what i was looking for to mount LED Clearance lights 116884

- A91CB

Part was a perfect fit replacement for my Heritage/Crownline boat trailer. Self-grounding bracket, 2 quick pop rivets or screws to install. 667852

- A91CB

Great product and easy to install would recommend them and buy again 650510

- A91CB


- A91CB

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 450738

- A91CB

Products delivered exactly as promised and advertised. Excellent support and service. Will be installing lights in the next few days. 418721

- A91CB

The product arrived quickly and works g reat. 385848

- A91CB

Worked great 336334

- A91CB

Part was exactly what I needed. Great price and well organized Website. Thank you I will be back!!! 262712


Working great just what I needed!!

Larry S - 06/20/2017


- A91CB

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. 252099

- A91CB

Good quality. Performs as advertised. 249448

- A91CB

What a great customer service deptment. Speedy fast and quick delivery. Thanks etrailer 227628

- A91CB

The product was delivered next day. Great prices and great customer service. 224611

- A91CB

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! 178997

- A91CB

great item works fine will buy again 161621

- A91CB

Product was as advertised... The lights are already fitted to the trike attachment for my MC... 94609


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


- A91CB

Great service and products. Always have been helped with any part and response is good. 51265


Ask the Experts about this Optronics Accessories and Parts

Do you have a question about this Accessories and Part?

  • 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...
    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...

  • 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 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...

  • 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...

  • 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...

  • 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 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...

  • 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...
    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...

  • 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 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...

  • 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...

  • 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...
    view full answer...

  • 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...

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Info for this part was:

Video Edited:
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Updated by:
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