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Optronics Combination Trailer Tail Light - Submersible - 8 Function - Incandescent - Driver Side
Optronics

Optronics Combination Trailer Tail Light - Submersible - 8 Function - Incandescent - Driver Side

Part Number: ST17RB
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$23.06
Retail:$34.74
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8-1/16" x 2-7/8" Rectangle. Waterproof incandescent light acts as brake, tail, turn, side marker, side reflector, rear clearance, rear reflector, and license plate light for trailers over 80" wide. Stud mount - includes hardware. Great Prices for the best trailer lights from Optronics. Optronics Combination Trailer Tail Light - Submersible - 8 Function - Incandescent - Driver Side part number ST17RB can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - ST17RB

Highlights

  • One Light, 8 Functions: Provides stop, tail, turn, side marker, clearance, reflector, and license plate lighting.
  • Ready for the Water: Sealed, waterproof housing keeps bulbs and wiring protected when submerged.
  • Quick Mount Setup: Stud mounts with included hardware for a fast, secure install.
  • Simple Power Connection: 3-wire design hardwires easily to standard 12V DC systems.
  • Trusted Replacement Fit: Exact match for Wesbar #3504 and Peterson #M456L lights.
  • Durable Build: Shockproof socket and red acrylic lens resist damage for longer bulb life.

Features to know about

Fully Sealed for Water Protection: Submersible Construction That Lasts

If you’re tired of lights failing after a dunk in the water, this one’s built to take it. The Optronics Combination Trailer Tail Light uses sealed, waterproof construction that keeps water out of the housing and away from the bulb and sockets. It’s submersible, making it a dependable choice for trailers that see boat ramps or wet roads. The shockproof socket design also helps the 2057 incandescent bulbs last longer even with vibration and impact.

All-in-One Rear Lighting: 8 Functions in a Single Unit

Instead of running multiple lights to meet safety requirements, this rectangular 8-1/16" by 2-7/8" tail light handles it all. It covers stop, tail, turn, rear clearance, rear reflector, side marker, side reflector, and license plate illumination—all in one housing. That built-in reflector means you don’t need to install extra reflectors on the trailer’s back or sides. It’s a clean, simple setup that keeps your wiring and mounting points tidy while staying compliant.

Flatbed trailer over 80 inches wide displaying combination tail lights installed at rear corners to illustrate proper clearance light placement for large trailers.

Reliable Power and Easy Wiring: 3-Wire Hardwire Design

You don’t need special connectors or adapters to get this light working. It uses a straightforward 3-wire design that hardwires directly into your existing trailer wiring—two power leads and one ground wire. At 12.8V, it draws 2.3 amps for stop/turn and 0.9 amps for tail functions, so you know exactly what your circuit is handling. The included mounting studs make installation solid and durable, with a 2" center-to-center spacing for quick alignment.

Direct OEM Replacement Fit: Matches Trusted Brands

When you’re replacing old or discontinued lights, finding an exact fit makes life easier. This Optronics ST17RB is a direct replacement for Wesbar #3504 and Peterson #M456L models, sharing almost identical dimensions—8-1/16" long x 2-7/8" tall x 2-13/16" deep. The included hardware means you can bolt it up right away without modification or guesswork. It’s a perfect match for anyone looking to refresh worn-out incandescent trailer lights with a proven design that just works.

Specs

Configuration

  • Configuration: driver side
  • Passenger side: ST16RB (sold separately)

Dimensions

  • Overall dimensions: 8-1/16" long x 2-7/8" tall x 2-13/16" deep
  • Distance between mounting studs (center on center): 2"

Technical dimension diagram of Optronics ST17RB combination trailer tail light showing rectangular shape with length, width, and mounting hole measurements for installation reference.

Electrical

  • Bulb type: 2057
  • Power draw at 12.8V: Stop/turn: 2.3 amps
  • Power draw at 12.8V: Tail: 0.9 amps
  • Voltage: 12V DC systems
  • Wiring design: 3-wire hardwire connection

Warranty

  • Warranty length: 3-Year warranty

Manufacturer Cross Reference

  • Wesbar #: 3504
  • Peterson #: M456L

ST17RB Optronics Marine Combination Tail Light - Submersible - 8 Function - Incandescent - Driver Side - Left Hand

Alternate part number: ST-17RB





Customer Satisfaction Score:

Ratings & Reviews

4.8

1291 reviews
Review sort icon
8-1/16" x 2-7/8" Rectangle. Waterproof incandescent light acts as brake, tail, turn, side marker, side reflector, rear clearance, rear reflector, and license plate light for trailers over 80" wide. Stud mount - includes hardware.

by:

This is a replacement light for my boat. It was easy to install and works perfectly. Be sure to clean all your ground connections and use grease to prevent rust keep connections solid. The order was received as promised and in good condition. This company is my go to for parts of this nature.



by:

i had a right light(itemst16rb) and i needed a left one (item st16rb)
i am putting tail brake and turn lights on a rack that fits into a 2in.
trailer hitch on my yukon thought it was a good idea
the right lite was one i purchased in 1993. i tried localy with no luck to
find a match for a left lite had no problem ordering one from E TRAILER



by:

Installed easily in place of the old lights and wiring was simple. Will come back If I have occasion to need trailer lights again.



by:

Carol C!! Very disappointed!! No nuts and bolts ho attach to trailer!! Had to cut off old ones so have none!! Also I m pretty sure when I went on line to inspected viewer and order there was a 2 plug in harness on wires which I wanted to continue water proof wire protection.?? Unhappy with product!!



by:

It is good to get the item you order in a timely fashion..This boat trailer light location is vulnerable to damage, but highly visible. etrailer has a lot of products that I may need later. Good follow up and timely delivery. Thanks.



by:

Fast shipping, exact fit replacement, works great.

Thomas profile picture

Thomas

2/9/2022

Still working great!



by:


Needed replacement tail lamps for cruiser
lift motorcycle carrier, etrailer delivered as promised with the correct product. Paula, representative for etrailer is great to work with and helped immensley to match an exact replacement making the entire replacement a snap. Have ordered multiple items from this company and have never encountered any difficultites with ordering, delivery or products offered.



by:

The tail light arrived fast and works g reat.



by:

The tail light was an exact replacement for the original light and I received it in just a few days. It has worked as good as new since with no problems. I appreciate the follow-up too.

Ralph profile picture

Ralph

4/17/2022

Its a new season and the light is working as well as when new.



by:

Wow this is the most amazing company I have ever dealt with on line. I ordered 2 tail light fixtures for my boat trailer and I needed them quickly so I paid the 2 day shipping fee and I didn't receive them for like 6 days. So I told them I thought I should get a refund on the freight, oh and bye the way the fixtures were perfect and exactaly what I had ordered. This sweet lady said she would refund me the difference between regular shipping and my 2 day shipping and she did. As it ended up I got them soon enough that I got the trailer ready to roll when I was supposed too afterall. So will tell everyone I know to shop etrailer for any thing they need if they like being treated great. THANKS AGAIN ETRAILER



by:

Tail lights came quickly and are working great. They were exactly the same as the originals. Thank you etrailer!

Roger T. profile picture

Roger T.

7/5/2018

Trailer lights still working well. Like them a lot just what I needed. Thank you.



by:

these taillights were just what I expected. they did the job of replacing my old taillights.

Laddie profile picture

Laddie

10/29/2018

still working just fine a year later



by:

Accidently crushed one of my boat trailer lights, so ordered a new one from etrailer.com When I received it. it looked strange as the lens on the right one looked different than the left on the original pair. I initially was skeptical that it would work but after installation it worked fine. A note..the trailer is from 2005-2007 so the design my optronics may have changed. Having said all that. I would never order anything for my trailers except from etrailer.com. The folks there are great. The best thing is that almost anything you order, there is a video to tell you how to install it...what to look out for when installing...a lot better than having to guess or at best find a relevant YouTube video....



by:

The two trailer lights came in and work but were not the exact same. Both were the same size but one light was only half as bright as the other and one had a window at the bottom to light up the road below it and the other one didn't. You should make sure both are exactly the same model.

Jenny N. profile picture

Jenny N.

10/4/2022

You mentioned that one light was brighter than the other and I had a question that I wanted to ask. Is one light brighter than the other on a specific function? I recommend checking the grounds on the lights and the wiring as that may be affecting it. If that does not help, please contact us. You also mentioned that one light has the clear light at the bottom. This light is meant to illuminate the license plate and this is why is it not included with the passenger side light.



by:

I had to replace my boat trailer lights on my 1995 Sea Ray boat trailer. These were the perfect replacement lights for the matching of the existing ones. The mounting holes lined up perfect, no drilling required, just remove the old and install the new.
It took more time to connect the wires on each side than to mount the new lights.
etrailer had these to me in three days, and there were exactly as described and many choices to pick from. I don't use the boat all that much, If it were newer and I used the boat more I would have went with the LED model. Again and as usual etrailer was top shelf on the shipping and the price!! Thanks folks, I'll be back again.



by:

Fast shipping, part arrived as predicted. The lights fit the application perfect. Great ordering experience, customer rep was very friendly and helpful. Definatly reccomend order from etrailer. *



by:

i HAVE NOT RECIEVED THE TAIL LIGHT LENS I ORDERED



by:

I broke an existing tail light on my boat trailer while backing up.. Replacement Was delivered on time. Easy hook up would recommend to anyone.



by:

It was awesome! Perfection for my 2012 trailer. Thx!



by:

Just like original !



by:

It was the perfect light and installed so easily



by:

Great waterproof replacement for one that the previous boat owner had installed that was not waterproof. Looks good, easy installation,except for having to destroy the existing one to get it off.



by:

Great product
The installation went
smooth



by:

Very good tail light and product! Testet it before installing it and it worked! After installing it, check my turn signals, hazard signals, and breaks and completely solved my issue, that way, when I'm coming back, especially after dark, I avoid getting a ticket! Very good and satisfied with this product and etrailer customer service, will purchase from here again in the future if needed! Thank you etrailer service for a good working light for my trailer and got a fair deal!

Matthew M. profile picture

Matthew M.

1/3/2024

Excellent product!



by:

Good packaging and arrived quickly. etrailer is my go to place for anything trailer


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See what our Experts say about this Optronics Trailer Lights

  • Replacement Tail Light For Trail Star Boat Trailer
    We have exactly what you are looking for. The replacement light we offer that will work for you is part # ST16RB. This is listed as an exact replacement for the Wesbar 3554 light on your trailer, which is the passenger side of the trailer. if the light you need is for the driver side of the trailer and has the license plate light then the light you need is part # ST17RB.
    view full answer...
  • Replacement for Wesbar Passenger Side Taillight
    The Wesbar light that the replacement lens # 102641 you were looking at fits has been discontinued. The company that bought Wesbar has been getting rid of a lot of their lights so it is unlikely you will find it. However, the Optronics Combination Trailer Tail Light # ST16RB will work as a replacement. This light has the same dimensions at 8-1/16" long x 2-7/8" tall x 2-13/16" deep. We also have the driver side # ST17RB if you would like to replace the pair.
    view full answer...
  • Replacement Wesbar 102641 & 102639 Lenses
    Hey Keb! We do have replacement lenses for your Wesbar lenses, but not in a kit to replace both taillights. Replacement Tail Light and Side Marker Lens for Optronics Combination Tail Light - Rectangle - Red # A16RB is a direct replacement for both the driver and passenger side and contains the taillight and side marker lenses. These are exactly the same specifications as the 102641 and 102639 lenses that you currently have. For a full light replacement, you can use Optronics Combination...
    view full answer...
  • Is Wire Removal Required when Replacing the Wesbar 3504 Tail Light
    If you are replacing your Wesbar 3504 tail light then there is no need to remove the wiring from inside the assembly itself. A replacement light, like part # ST17RB for the left hand or part # ST16RB for the right hand, will come with its own wiring that you will connect to the wiring on your trailer. A review video and an installation video have been linked for you to reference.
    view full answer...
  • Replacement Lights for a Wesbar 102640 Tail Light
    Hey Stuart. There's a couple of different options to replace your Wesbar taillight 102640. Both of them measure measure 8-1/16" long x 2-7/8" tall x 2-13/16" deep. If you want the same incandescent bulbs you can use the following parts; Driver Side - Optronics Combination Trailer Tail Light item # ST17RB Passenger Side - Optronics Combination Trailer Tail Light item # ST16RB If you're wanting to upgrade to more efficient LED lights you'll want the LED Combination Trailer Tail Lights...
    view full answer...
  • Replacement Submersible Lights for the Older Wesbar 403026 and 403076 Trailer Lights
    Hey Julie, thanks for the measurements. The replacements for your old Wesbar trailer lights are the Driver Side item # ST17RB and the Passenger Side item # ST16RB. These are eight function submersible lights that measure 8-1/16" long x 2-7/8" tall x 2-13/16" deep. I've attached a dimensional diagram below. Did you check your ground wires and the power running to your lights? You may have an issue with the wiring, which won't be fixed by replacing the lights.
    view full answer...
  • Replacement Submersible Light for a AISTLP2 93 Tail Light
    Hey Pierette, thanks for the information! To replace your AISTLP2 93 tail light, you'll want the Optronics Combination Trailer Tail Light item # ST17RB. This submersible incandescent light measures 8-1/16" long x 2-7/8" tall x 2-13/16" deep. It has stop, tail, turn, side marker, side reflector, rear clearance, and rear reflector functions along with a built-in license plate light. If you want a matching passenger side you'll need the Optronics Combination Trailer Tail Light item # ST16RB. What...
    view full answer...
  • Is The Optronics Combination Trailer Tail Light # STL17RB Submersible
    Hey Kenneth, The clear portion at the bottom of the Optronics Combination Trailer Tail Light # ST17RB is for the license plate light. The housing for the # ST17RB is sealed to prevent water from getting in and the electrical components are encased in resin to prevent any issues if water did leak in.
    view full answer...
  • Replacement Lights for Discontinued Wesbar 102640
    Hi Randall; the Optronics Combination Trailer Tail Light # ST17RB you were looking at is my recommendation to replace your Wesbar lights. For the passenger side you need the # ST16RB. These measure 8-1/16" long x 2-7/8" tall x 2-13/16" deep which is almost identical to the 102640.
    view full answer...
  • Availability of Three Wire Incandescent Bulb Trailer Lights
    Hey Jeff, you could use the part # ST17RB for the driver side and the part # ST16RB for the passenger side. These are both three wire assemblies with incandescent bulbs like you are wanting. You'd just need to cut off the 3 prong connectors you have and hardwire them like it sounds like you already knew you'd have to.
    view full answer...
  • Correct Replacement Taillight for Trail Star Boat Trailer
    In order to replace the taillight on a Trail Star Trailer you'd simply find one with the same style (shape/function) and then choose the correct replacement based on size. There are several types of Trail Star Trailers so it would be difficult to offer an exact replacement without knowing what you have but most of their boat trailers use a light similar to the Optronics Combination Trailer Tail Light part # ST16RB for passenger side and part # ST17RB for driver side. These feature a two...
    view full answer...
  • Replacement Tail Lights for Optronics A1STP2 93 on 2005 Trailstar Trailer
    We have both an LED and incandescent option for equivalent replacement lights on your 2005 Trailstar trailer. If you want incandescent lights then you can use the # ST16RB for the passenger and # ST17RB for the driver side. For LED lights you can use the # STL16RB for the passenger and # STL17RB for the driver side. I have attached some review and installation videos for your reference.
    view full answer...
  • Replacement Lens for Wesbar Lens Part 102641
    The Optronics Trailer Tail Lights # ST16RB (right) and # ST17RB (left) are direct replacements for Wesbar lights 3554 and 3504. The Wesbar part 102641 is actually a replacement lens, which we do offer as # 102641. The complete Webar light that replaces 3554 is # 403026 and for 3504 it is part # 403076.
    view full answer...
  • Replacement Tail Light for 1995 EZ Load Sea Ray Boat Trailer
    Thank you for providing that information. Based on that information you have a Wesbar 3504 light and the direct replacement is the Optronics Combination Trailer Tail Light - Submersible - 8 Function - Incandescent - Driver Side # ST17RB. This is the one with the built-in license plate light. If you end up needing to replace your passenger side light as well we also have the # ST16RB available. I have attached a review and installation video for your reference.
    view full answer...
  • Replacement Trailer Lamp Needed for Part # ST17RS
    For the right side tail light assembly, use part # ST16RB. Part # ST17RB is the assembly for the drivers or left hand side. These will be an exact replacement for what you currently have. The ST17RS is the same light, sold individually. ST17RB is sold in bulk, which is how we purchase them. Each assembly has a lead for the brake/directional, a lead for the running lights and a separate ground wire.
    view full answer...
  • Replacement Bulbs for Optronics # ST16RB Taillight
    The Trailer Light Kit you referred to uses an # ST16RB and a # ST17RB taillight, which use a 1157 replacement bulb which we offer as part # DI79VR .
    view full answer...
  • Parts Needed to Add Lights to 50 Foot, Triple Axle Trailer with No Existing Lights
    Thanks for the photo of your trailer! The taillights I recommend for your trailer are the Optronics Over 80 Inches, Rectangular Submersible Trailer Tail and License Light, Left-Hand # ST17RB and the Right Hand # ST16RB.These lights will provide you with the stop/brake light, tail light, turn signal, rear reflector, license plate lights, rear side marker lights, and rear side reflectors needed for trailers 30 feet or longer. For front side clearance lights and reflectors as well as intermediate...
    view full answer...
    Image 1 for
  • Water Gets Into Boat Trailer Taillights and Blows Fuse
    You've hit the nail on the head. When the water is in the taillights assembly, it shorts the power supply circuit to ground causing you to blow fuses. I've seen folks drill a drain hole in the lowest point of the underside of the lamp housing, but your best course of action is to prevent the water from getting in there in the first place. The best fix would be to replace the existing lights with submersible ones, like the # ST17RB and # ST16RB. These lamps are sealed to keep water completely...
    view full answer...
  • Replacement Tail Light for 2000 TrailStar Bass Tracker Pro Boat Trailer
    I looked up some photos of a 2000 TrailStar Bass Tracker Pro Boat Trailer and it most likely uses either the Optronics Combination Trailer Tail Light part # ST16RB for passenger and part # ST17RB for driver side or the Optronics Combination Trailer Tail Light part # ST8RB for passenger side or part # ST7RB for driver. Unfortunately, you'd have to replace the entire tail light as we'd not have just the lens.
    view full answer...
  • Replacement Trailer Light Recommendation to Replace a Wesbar 3504
    The Over 80", Rectangular Submersible Trailer Tail and License Light # ST17RB that you referenced is an exact replacement for the Wesbar 3504 light you have so it would work perfectly for you.
    view full answer...
  • Installation of Replacement Trailer Lights on Boat Trailer with Multiple Ground Wires
    If a trailer is made of aluminum rather than steel it will sometimes need ground jumper wires on each light since the aluminum frame does not always provide enough conductivity. Steel frame trailers can usually do with just one main ground wire that connects between a clean bare metal spot on the frame and a wiring junction box like # 38656 where all the individual lights' grounds will join it. Junction boxes can still be used on steel frame trailers, especially when it comes time to...
    view full answer...
    Image 1 for
  • Replacement Trailer Taillight Assemblies for 2015 Grizzly 1754 SC
    I looked up pictures of your 2015 Tracker Grizzly 1754 SC and it appears to have the trailer taillights part # ST36RB for the right hand side and the part # ST37RB for the left hand side.
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  • Driver and Passenger Side 3-Wire Submersible Incandescent Trailer Tail Lights
    We do have an option for you, though the matching driver's side of the Aero Pro Trailer Tail Light - Submersible - Passenger Side ST66RPG has been discontinued and is no longer available. What I highly recommend instead is the Optronics Trailer Tail Light - Driver Side # ST17RB and Passenger Side # ST16RB because these are 3-wire, submersible, incandescent lights like the ones you asked about so they will work as perfect replacements. Since these are 3-wire lights you can easily splice...
    view full answer...
  • How Do you Wire in 3-Wire Trailer Tail Lights on a 1999 Nitro 700LXB Trailer
    Virtually any three-wire tail-light assembly would work for you, since this is a boat trailer you will want to use a light assembly that is submersible. You will just need to wire the new tail lights in to your current wiring, mount the tail light and you would be good. The Optronics Trailer Light # ST16RB that you referenced would work for you. It would be the right hand side light and you would just wire it in by color and you would be good to go. For the left-hand side you would want...
    view full answer...


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