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

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

Item # A91BB
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Optronics Trailer Lights - A91BB
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Black plastic bracket lets you install an Optronics A91 Series, AL90 Series, AL91 Series, or AL191 Series trailer 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 A91BB or order online at etrailer.com. 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 - Black. Accessories and Parts reviews from real customers.
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Optronics Accessories and Parts - A91BB

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

Black plastic bracket lets you install an Optronics A91 Series, AL90 Series, AL91 Series, or AL191 Series trailer light. Surface mount on 2" centers. Light grounds through mounting hardware (sold separately).


Features:

  • Mounting bracket for Optronics A91 Series, AL90 Series, AL91 Series, or AL191 Series trailer clearance/side marker lights
  • Gasket creates a weathertight seal
  • Self-grounding, surface-mount design
    • Light grounds through mounting hardware (sold separately)
  • Single-wire harness (A91LW) 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 self-grounding base

Bracket is a direct replacement for:

  • Uni Bond BM1020BC
  • Wesbar 106289
  • Truck Lite 15408


A91BB Optronics Black Plastic Base for A91, AL90, AL91, or AL191 Series Trailer Clearance/Side Marker Light

Alternate part number: A-91BB





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

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




Video Transcript for Optronics Trailer Lights A91BB Review

Today we're going to be taking a look at the mounting bracket for Optronics Trailer Lights. This mounting bracket is for Optronics A91 series, AL90 series, AL91 series and AL191 series trailer clearance or side marker lights. There' a nice gasket on the bottom that creates a weather tight seal at the mounting location and it's a self grounding surface mount bracket design. What that means is that the light actually grounds through the mounting hardware so there's this bracket bridge right here that will engage one of the prong connectors on the back of your light. That goes in that location there and then that bridge is over to one of the mounting locations so when you install your mounting hardware, it's going to ground through the mounting hardware. A single wire harness, like a single wire plug is required for a trailer light. Part number A91LW, that is sold separately. It's available here ate Etrailer.com.

This is constructed from a black molded plastic, very strong durable design. Taking a look at a few dimensions real quick starting with the overall length of the unit. It's going to measure at about 2 and seven eighths of an inch long. The width here at the mounting base, that's going to measure about an inch and a half wide. The height or the depth is only about half an inch deep. The mount holds on this unit, those are separated on center by 2 inches.

Mounting hardware is not included. I do have a light here just to show you how it would install. Your light's going to have these mounting tabs on the sides so those mounting tabs engage in the bracket and then just snaps and clicks into place. Then again, one of those prongs is going to engage in this hole right here for the self grounding function or design of the bracket. Really nice design, very easy to use, very easy to mount as well. That's going to do it for today's look at the mounting bracket for the Optronics Trailer Lights..


Customer Reviews

Mounting Bracket for Optronics 90 Series or 91 Series Trailer Lights - Self-Grounding - Black - A91BB

Average Customer Rating:  4.8 out of 5 stars   (51 Customer Reviews)

Black plastic bracket lets you install an Optronics A91 Series, AL90 Series, AL91 Series, or AL191 Series trailer light. Surface mount on 2" centers. Light grounds through mounting hardware (sold separately).

- A91BB
by:

Loved it, the website was great....very detailed! All the parts I ordered were exactly what I was looking for, just wish you sold boat parts as well. 146271



- A91BB
by:

I received the lights I ordered for my boat trailer. They were exactly what I needed. They were shipped promptly and were packaged safely & securely. I appreciate the quick turnaround! 321590



- A91BB
by:

I recently purchased red reflective lights for my boat trailer. Price, service and fast delivery time are outstanding. There is no need to waste time, money and energy trying to find items locally. Just let your fingers do the walking on-line to buy quality products at a reasonable price. Carl Milligan - Kinston, NC 287191



- A91BB
by:

Solid product. I liked the grounding feature. Hardware required for installation, but I preferred SS for a marine environment. Be aware that the low profile does not allow the straight plug clearance on installation. Required a larger hole (3 total; 2 mounting and for the plug) in the trailer for clearance. Allow for this when measuring for mounting location and placement. 680408



- A91BB
by:

Products ordered and delivered were exactly what I needed. Ordering parts was easy. Etrailer provides ample info describing parts listed on their website. Delivery was quick. I will order from them again. 703638



- A91BB
by:

Nice product! As advertised!! 697703



- A91BB
by:

I've ordered everything from wheels and tires, to lights for my trailer. Customer service is always quick to answer any questions, or to help you get the right items for your needs. Prices are always great as well. 692833



- A91BB
by:

Works well 668489



- A91BB
by:

Easy install, but dont use loctite near the plastic frame, it deteriorated the plastic and ate it up. 665414



- A91BB
by:

easy replacemenmt 577844



- A91BB
by:

Ordered these as a replacement to the chrome ones that come in the kit. 555757



- A91BB
by:

Have all the parts with a great selection and price of trailer parts. Fast shipping with great communication. 546702



- A91BB
by:

I like shopping at etrailer for the vast variety of parts offered. I looked on Amazon first but they just didn't have the everything I needed in one place. etrailer did! Transaction was easy, shipping was fast, parts work as advertised, and prices are fair. What more can you ask for!! This particular part was an exact fit on my trailer. Works great, nice and bright! A big upgrade from the part I had in there previously. 528178



- A91BB
by:

good little light the grommet fit too (my ezloader trailer) good service, got her in a few days. 486618



- A91BB
by:

The light base is well made and fits pe rfectly. 480598


Comments
Still great after a year.
Jerry - 03/02/2019

50066

- A91BB
by:

Perfect fit!!!! I will add another to my next order to have as a spare. 449918


Comments
It’s been a year now and this product is still going strong. I am very happy with this purchase.
Darrell - 11/07/2018

45497

- A91BB
by:

Dear etrailer, It has been a pleasure dealing with both Lisa and your company. I got a fantastic deal plus free shipping. You are my go to guys for trailer supplies. Thanks 388171



- A91BB
by:

Mounting bracket keeps the light assembly secure on my trailer fendets. Nice value and nice price. 337689



- A91BB
by:

These are exact replacements for the marker lights on my Heritage trailer. They must to have on hand as spares. 294514



- A91BB
by:

The lights and brackets arrived nicely-packed, and worked on my boat trailer as intended as intended. Check the original mounting holes. The mounting holes for the new light bar were located in different positions, than the damaged light bar I replaced, so a drill and bits, and zinc spray paint might be necessary. I also used stainless steel screws, instead of the supplied screws. 292500



- A91BB
by:

Works good, easy install, needs to be on flat surface. Worked well for my boat trailer. 286112



- A91BB
by:

No issues so far 250932



- A91BB
by:

fast shipping perfect match thanks 235155



- A91BB
by:

Item as described. Super fast shipping and great communications. 229389



- A91BB
by:

Easy to install 217663


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Show More Reviews

Ask the Experts about this Optronics Accessories and Parts

  • Grommet Recommendation for the LED Waterproof Grommet Mount Clearance Side Marker Light # 47-203667
    The recommended grommet for the # 47-203667 and # 47-203668 that you referenced is the part # 221588. Without knowing exactly what you have on your trailer it's hard to say why the lights you have won't fit it. Unless you can come up with a way to modify the grommet you have now the only recommendation I can make would be the part # 221588.
    view full answer...
  • How to Mounting the Mounting Bracket for A91 and AL91 Series Trailer Lights
    I would recommend using stainless steel sheet metal screws for mounting the Mounting Bracket for A91 and AL91 Series Trailer Clearance, Side Marker Lights, since the connection to the trailer needs to make a good ground connection.
    view full answer...
  • Black Mounting Bracket for A91 Series Trailer Clearance Lights # A91BB Recommendation
    The Sealed, Mini Rectangular Trailer Clearance and Side Marker Light, part # A91RB, that you have are self grounding. You would need a Black Mounting Bracket for A91 and AL91 Series Trailer Clearance, Side Marker Lights -Self Grounding, part # A91BB, for them to ground and function correctly. Your other option would be to run a ground wire and power wire to the two terminals of the # A91RB. However, it would probably be easier to just get the # A91BB.
    view full answer...
  • What Size Hardware Should be Used to Mount Mounting Bracket for A91 and AL91 Series Lights # A91BB
    I went out to the warehouse and pulled Black Mounting Bracket for A91 and AL91 Series Lights # A91BB and found that the largest screw size you could use is a 3/16 inch. The hole diameter is actually approximately 0.19 inches which is slightly larger than 3/16. Given the coverall depth and the depth from the inside mounting surface, a 1/2 inch long screw at least would be ideal.
    view full answer...
  • Bolt Hole to Bolt Hole Dimension for the Black Mounting Bracket # A91BB
    The center to center dimension of the Black Mounting Bracket # A91BB mounting holes is 2 inches.
    view full answer...
  • Troubleshooting Running Light Circuit Fuse Blowing on Trailer when Plugged In
    There is a short somewhere on the marker light circuit of your trailer. You will need to go over the wiring of the circuit looking for any cut or exposed wire and fix as necessary. That is why the fuse keeps blowing. I attached a couple help articles that you should find helpful as well.
    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...
    view full answer...
  • What is the Depth of Optronics 2-Wire Pigtail?
    I believe what you are asking is the depth of 2-Wire Pigtail # A46PB, and it is 0.6 inches, which is just 0.1 inches more than the depth of both mounting brackets you were referring to, # A91BOB as well as the self-grounding # A91BB. This means it would protrude ever so slightly from the back of the bracket when attached to lights # AL90RB and # AL90AB.
    view full answer...
  • Replacement Amber Clearance Light for a Peterson PM 150
    Sealed lights would have to be replaced since there is not easy way to get them open and maintain functionality of the light. Your light looks similar to # A91AB. This light measures 2-1/2 inches across, 1-3/16 inches tall and 7/8 inches deep. It mounts in base # A91BB and can use harness # A91LW.
    view full answer...
  • Is there a Grommet for Peterson Clearance Light # M152A
    For a rubber grommet that will fit the Peterson clearance light # M152A you can use # A91GB. If you are looking for the plastic base we do not carry that particular model and in that case I recommend switching to light # A91AB and using bracket # A91BB with power wire # A91LW (the light grounds through one of the mounting screws with this light and bracket combination).
    view full answer...
  • Replacement LED Taillight Recommendation for 2002 Shoreland'r Profile 2000 Boat Trailer
    We do indeed have some LED taillights that'd work great on your boat trailer. I'd recommend # STL57RB for the driver side and # STL56RB for the passenger side. These lamps measure 6-1/16 x 2-5/8 inches, and would work well on your trailer. As you can see in the photo provided by one of our customers, the taillight works well on a Shoreland'r trailer. As long as they're still working okay, you certainly may leave the existing fender running lights in place. If you decide you want to...
    view full answer...
  • Replacement Boat Trailer Clearance Light with SAE P2 91 DOT on the Lens
    The number on the lens that you see is the lens rating, not a part number so it is difficult to go by that number. There might be a part number on the back of the light housing. Otherwise it would be easiest to go by the dimensions of the light. For example light # A91RB does have the same lens rating. It would use a base such as # A91BB and wiring harness # A91LW for the power wire.
    view full answer...
  • Mounting Bracket Recommendations For Optronics Thinline LED Clearance and Side Marker Light
    For the # AL91RB trailer lights we have a couple options for mounting brackets. For a self-grounding bracket where the light is grounded through the mounting hardware I recommend part # A91BB. The gasket is included. For a mounting bracket that has an open back you need part # A91BOB.
    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...
  • Are All LED Lights Submersible For Use On Boat Trailer
    When selecting an LED light, if the description states it is waterproof or submersible then the light can be submersed in water. The item you selected, Waterproof, Under 80 Inch LED Trailer Light Kit with 25 Foot Wiring Harness, part # TLL9RK, has encased LED diodes. Water can enter the light lens but not the LED casing. There are also 2 holes that allow water to drain out of the lens. Part # TLL9RK are used for the rear trailer lights for running, turn, and brake lights. For sealed...
    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...
  • How to Wire up the Thinline LED Clearance and Side Marker Light to Single Wire Trailer
    To use the # AL91RB on a trailer that has one wire for the power wire and then grounds through the mounting bracket would only require the bracket part # A91BB for the bracket and then part # A91LW for a single wire connector.
    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...
  • Troubleshooting LED Single Wire Clearance Lights
    The reason your single wire LEDs aren't working is because you aren't using a ground. Most single wire lights like the Amber Clearance Light with Stainless Steel Hardware # 47-99-006 will have a separate ground like in the mounting hardware. The Thinline LED Clearance and Side Marker Light # AL91RB you asked from will ground through the mounting bracket # A91BB. The mounting with butyl tape is the issue. You need to have a ground connection for your clearance lights to work.
    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...
  • Does Optronics Mini Thin Line LED Marker/Clearance Light # AL191AB Use Grommet # A91GB
    Yes, the Optronics Mini Thin Line LED Marker/Clearance Light # AL191AB can be flush-mounted using the Optronics Flush Mount Grommet # A91GB. This PVC grommet will provide a degree of shock protection for the installed light and its rear opening allows easy access for wiring. If you prefer a surface-mount installation, you can instead use self-grounding mounting bracket # A91BB. The marker light # AL191AB has a 2-prong input on the back; you can use 6-inch pigtail plug # A46PB, or...
    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...
  • Is Female Plug Available For Single Wire Male Plug For A91 And AL91 Series Trailer Lights
    The single wire plug # A91LW is designed to plug into a light that has the female plug already installed on the back of the trailer light. The # A91LW has a 12 inch lead wire with the male plug attached. Many of the Series 91 lights have two female plugs which would use the standard 2-prong wire like part # A46PB. If you use a self-grounding bracket like part # A91BB for a series 90 or 91 trailer light, the single wire # A91LW can be used.
    view full answer...
  • Dimensions of Bargman #99 Series Mini LED Light
    No; from my research it looks like the Truck-Lite 15 Series is 2-1/2" long and roughly 1-3/16" tall. The Bargman #99 Series Mini LED Lights # 42-99-401 measure 2-1/8" x 1-1/8" x 1-1/16". The closest light we have to the dimensions of the Truck-Lite are the Optronics # AL91RB, which are submersible LED lights that measure 2-1/2" long x 1-3/16" wide x 7/8" deep. For a surface mount to install this light you need Self-Grounding Bracket # A91BB and Single-Wire Plug # A91LW
    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...
  • Driver Side Trailer Side Marker Light Does Not Light Up
    It looks like you have the Sealed, Miro Flex, Mini Thin Line LED, # AL191AB. What I think is happening is that there is a bad ground connection. The bracket you are using, # A91BB, has a ground transfer that moves the ground from the terminal in the back to the mounting hole. Check to make sure that the bracket is secured to a bare metal surface that is free of dirt and corrosion. You may try grounding the terminal using a wire instead of through the mounting hardware to get a better...
    view full answer...
  • Trailer Clearance Light Part # A91RB Installation
    To connect the Optronics Red Mini Rectangular Trailer Clearance and Side Marker Light to your existing trailer wiring, you would need the pigtail which is part # A91LW if you were using the self grounding mounting bracket, part # A91BB. If you were using some sort of other bracket that is not self grounding, a two wire pigtail is offered, part # A46PB.
    view full answer...
  • How Does the Red Side Marker Trailer Light # AL91RB Install and what Parts are Needed to Install
    For the clearance light # AL91RB and the matching amber light you would install the lights in the appropriate bases like # A91BB and then use 2-wire pigtail # A46PB, plug it into the backs of the lights and attach the wires to the existing trailer wiring. The ground wire can be attached directly to the trailer frame. I have included a link to a video review of the clearance light for you.
    view full answer...
  • Replacement Clearance Light and Mounting Bracket for PM150 Amber Light
    While we do not have the exact PM150 model light you mentioned available, we do have a very similar unit with the Optronics Sealed Clearance and Side Marker Light # A91AB. This light measures 2-1/2 inches long, 1-3/16 inches wide, and has a depth of 7/8 inches. The mounting bracket that this light attaches to is part # A91BB. The bracket itself measures 2-7/8 inches long, 1-1/2 inches wide, and 1/2 inch deep. The mounting holes are spaced apart 2 inches, center to center. I have attached...
    view full answer...

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Info for this part was:

Expert Research:
Robert G
Expert Research:
Michael H
Expert Research:
Jameson C
Updated by:
Laura H
Updated by:
Amy B
Updated by:
Brian T
Installed by:
Cole B

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