Combination Trailer Tail Light - 7 Function - Incandescent - Square - Red Lens - Driver Side

Combination Trailer Tail Light - 7 Function - Incandescent - Square - Red Lens - Driver Side

Item # ST9RB

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ST9RB - 5L x 4-1/2W Inch Optronics Tail Lights
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Product Images

In Use/Installed

Customer Photos


  • Tail Lights
  • Square
  • Incandescent Light
  • Red
  • Surface Mount
  • 5L x 4-1/2W Inch
  • Non-Submersible Lights
  • Optronics
  • Stop/Turn/Tail
  • Side Marker
  • Side Reflector
  • Rear Reflector
  • License Plate
5-3/16" x 4-9/16". Incandescent trailer tail light serves 7 functions: stop, turn, tail, rear reflex, side marker, side reflex, and license light. Shock-proof sockets protect bulbs. Stud mount on trailer. Quick connect wiring. 2 bulbs. Lowest Prices for the best trailer lights from Optronics. Combination Trailer Tail Light - 7 Function - Incandescent - Square - Red Lens - Driver Side part number ST9RB can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (636)
  • Q & A (25)
  • Videos (2)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - ST9RB

5-3/16" x 4-9/16". Incandescent trailer tail light serves 7 functions: stop, turn, tail, rear reflex, side marker, side reflex, and license light. Shock-proof sockets protect bulbs. Stud mount on trailer. Quick connect wiring. 2 bulbs.


Features:

  • Square incandescent trailer light serves 7 functions for trailers less than 80" wide
    • Stop, Turn, Tail, Rear Reflex, Side Marker, Side Reflex and License Plate Illuminator
  • Built-in reflector removes the need for a separate reflector
  • Shock-proof sockets protect bulb against damage
  • Incandescent bulbs are easy to replace
  • Durable plastic housing with screw-on lens
  • Red lens over incandescent bulbs
  • Compatible with 12V DC systems
  • Stud mounts to trailer - hardware included
  • Quick connect wiring: simply insert stripped wire into holes for a secure connection
    • Light grounds through mounting studs
  • DOT compliant


Specs:

  • Configuration: driver side
    • Passenger side: ST8RB (sold separately)
  • Dimensions: 5-3/16" long x 4-9/16" tall x 2-7/8" thick
  • Distance between mounting studs (center on center): 2"
  • Power draw at 12.8V:
    • Stop/turn: 2.5 amps
    • Tail: 1.0 amps
  • 3-Year warranty


Manufacturer Cross Reference

Light will work as an exact replacement for:

Uni Bond # TL4400L

Wesbar # 3010

Grote # 52312

Peterson # M440L


Optronics ST9RB Series Universal Combination Tail Light Dimensions

ST9RB Optronics Tail Light for Trailers Under 80" Wide - 7 Function - Incandescent - Square - Red Lens - Driver Side - Left Hand

Alternate part number: ST-9RB






California residents: click here


Video of Combination Trailer Tail Light - 7 Function - Incandescent - Square - Red Lens - Driver Side


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




Video Transcript for Optronics Trailer Lights - Tail Lights - ST9RB Review

Today we're going to review part number ST9RB, this is the Optronics Trailer Stop Turn Tail and license plate light. This is a 7-function light for the left-hand side of the trailer. This is a multifunction stop turn taillight and this red square taillight will serve 7 functions for trailers that are less than 80 inches. It'll serve the functions stop, turn, tail, rear clearance, rear reflex, side marker, side reflex and license plate light. The molded plastic housing and durable lens will provide all weather protection against corrosion. The light features are screw-down replaceable lens and an easy to replace incandescent bulb.

The bulb size on the inside will be 1157. The light socket is shockproof guaranteeing long bulb life and this light is a universal mount which will mount with the two studs on the back of the lights and those studs are two inches apart on center. This light does use the quick connect wiring which you will simply insert the strip wire into the holes and it'll lock in place. To release it you just push a paper clip in a hole right next to it and that will pull that out. This light is grounded through the mounting studs so when this is mounted on the trailer you do need to make sure the studs are mounted to the trailer securely so it'll give you a good ground. A few dimensions on this light, the overall length from the edge to the side marker will be 5 17/64.

The depth on this light will be 2 7/8 inches and on the lens itself will be 4 9/16 by 4 9/16. And now what I'm going to do is I have a power supply here and I hook up the strip wires I have and basically I will put in the brown wire and it says on the back tail are brown so we push in that. And if I use the white and ground it to the stud, it'll give you the light; that will be your taillight. If I take the green wire, push that into the one that says, taillights and then ground it. Or push that into the one that says stop and turn and I grounded it and that will give you the brightness of the stop and turn light and then what I'm going to do is turn off the overhead lights to give you an idea of what the light will look like in the dark.

That will be your taillight and when we hit the stop and turn; that will be the brightness of the stop and turn. And that will do it for part number ST9RB.


Customer Reviews

Combination Trailer Tail Light - 7 Function - Incandescent - Square - Red Lens - Driver Side - ST9RB

Average Customer Rating:  4.9 out of 5 stars   (636 Customer Reviews)

5-3/16" x 4-9/16". Incandescent trailer tail light serves 7 functions: stop, turn, tail, rear reflex, side marker, side reflex, and license light. Shock-proof sockets protect bulbs. Stud mount on trailer. Quick connect wiring. 2 bulbs.

- ST9RB
by:

Well packed, good quality, delivered on time.......Great deal 224808


Comments

A no regret purchase. Thank you.

John B - 09/09/2016

20867

- ST9RB
by:

Product came on-time..no damage..works great! 148890


Comments

No problems with product. Would purchase again. Thanks.

N.D. - 08/31/2015

14652

- ST9RB
by:

I ordered both the ST9RB and ST8RB. After years of use, my other boat trailer lights were starting to cause me problems. I decided to order new ones for each side. These are a different make, but the connections were the same as were the mounting holes. Just took minutes to mount and both worked great. Nice bright lights again! Good price and fast shipping. I would definitely order again. 211119


Comments

Other than changing a bulb, they are still working like new! Money well spent.

jes - 07/11/2016

19314

- ST9RB
by:

Great product 718155



- ST9RB
by:

They WORK!! After trying to retro-fit some old taillights I had laying around, I bought and installed these on my trailer. I should have my head examined for not starting out with these lights for the solution to my situation. 715814



- ST9RB
by:

Perfect fit in mounting and wiring on my 6’x10’ utility trailer. Expeditiously shipped. 713081



- ST9RB
by:

The product was just what I ordered and fit perfectly. Delivery was fast and on time. I highly recommend this company. 711726



- ST9RB
by:

Great selection, low prices, fast service and a very helpful salesperson...Barry L. This all adds up to a perfect 5 star rating! 700365



- ST9RB
by:

I would have given this purchase FIVE (5) stars but........... The assembly that I received had a sticker on the lens that I had to scrape off and use lighter fluid to get all of the residue off. Afterwards is showed signs of being scratched where the sticker was. Then I discovered that even though this was supposedly a “watertight” submersible tail light assy. There were no seals between the lenses and the assembly. So I thank God that I bought this assembly only for the 2 lenses and I had 2 old gaskets on the old assy. to keep the water out. I will say thank you very much for the quick shipment. And I will be buying more items from you in the future!!! 700086



- ST9RB
by:

Perfect replacement for my broken trailer taillight. Probably took less than 5 minutes to install. 698667



- ST9RB
by:

My etrailer products I have ordered have and continue to be good products at reasonable pricing. I look forward to doing business with etrailer again as I am sure I will have a need for more items. 696946



- ST9RB
by:

Replaced A lost license plate holder, the new one is working perfectly thank you very much 696636



- ST9RB
by:

Bought this to replace one that had seen better days. Good quality product. 696594



- ST9RB
by:

Korren was very helpful in determining which light would fit on my dump trailer. The light came quicker than I expected and is of good quality. 693298



- ST9RB
by:

Great quality Lights at a Great Price 693938



- ST9RB
by:

Exactly what I needed. In stock and shipped promptly. Thanks. 687051



- ST9RB
by:

Excellent service and product was delivered on time. The tail lights were exactly what I was looking for. A perfect fit. 683428



- ST9RB
by:

Still working well after a year of use. 680098



- ST9RB
by:

Worked well for the intended use on a light duty trailer that is not heavily used. The internal contacts are less robust than I would like but they are OK for the intended use. 674108



- ST9RB
by:

Works great, easy to put on. Nice and bright - brighter than the original on the other side. 674037



- ST9RB
by:

Perfect replacement for the light I broke. Quick shipping. 667577



- ST9RB
by:

Fair price easy install works well 647901



- ST9RB
by:

Everything from etrailer is always as described and great prices and quick shipping! 643452



- ST9RB
by:

Good 639279



- ST9RB
by:

Great product great quality. Seller shipped item very fast along with instructions and easy install. I will defiantly buy again. 638079



- ST9RB
by:

It arrived on time and just what I need ed 635861



- ST9RB
by:

A good light. It is still working fine. 617028



- ST9RB
by:

Great as always!!!! Thanks 612946



- ST9RB
by:

Good product at a great price 608634



- ST9RB
by:

It doesn’t get any easier to install this light. And the price Was right 607667



- ST9RB
by:

Just what I needed and exact product that was on my trailer 605836



- ST9RB
by:

It is exactly what I needed. no problem s. 603756



- ST9RB
by:

As described and order cam was ordered. 600093



- ST9RB
by:

After the light broke on my trailer I could not find a replacement at the original manufacture, my search at etrailer paid off with an exact replacement and at a great price. Shipping was fast and on time. 598218



- ST9RB
by:

Light works great. Easy hookup. 597034



- ST9RB
by:

Needed a tail light assembly for my golf cart trailer, called with what information l could gather by looking at the broken one. All l could tell them was it was the driver side tail light assembly. She had it solved in about 30 seconds, got it ordered and it was shipped quickly.. project done. Thank you good job. 592203



- ST9RB
by:

Great Price, Great Service! Job well d one! 591244



- ST9RB
by:

ALL GOOD 583568



- ST9RB
by:

Extremely easy to install. Exactly what I needed! 583360



- ST9RB
by:

They’re fine, and replace my old lights perfectly. 582873



- ST9RB
by:

great price and fast shipping 582086



- ST9RB
by:

I have broken the taillights on my utility trailer several times. I have always found etrailer’s website simple to navigate and their products to be high quality. I will continue to break taillights so I will likewise continue to purchase from etrailer. 579178



- ST9RB
by:

Perfect fit and functionality with a price that didn't break the bank. 577189



- ST9RB
by:

Items just as described at a reasonable price. All received in good condition. Thanks 575547



- ST9RB
by:

Very easy to install. No wire splicing required. I’m very pleased with these tail lights. 575244



- ST9RB
by:

Shipped quickly. Installed in a few minutes. Worked with no problems. 574913



- ST9RB
by:

My trailer is probably more than 20 years old (hand me down from my dad) but the installation was straight forward and it fit exactly where the old ones were without issue. 572577



- ST9RB
by:

Good price, great fit, quick delivery 565561



- ST9RB
by:

Exact match replacement fit. Quick shipping. 2nd product purchased. Would shop at etrailer again. 555610



- ST9RB
by:

Shipped fast,priced right. I have always had great service from this supplier. 552476


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Ask the Experts about this Optronics Trailer Lights

Do you have a question about this Trailer Light?


  • Locating Left Side Assembly for Optronics Trailer Light # ST8RB
  • The Optronics Trailer Stop, Turn, and Tail Light # ST8RB referenced in your question is for the right side of the trailer. For the corresponding Left Hand assembly, you will just need part # ST9RB, which also includes the needed license plate light. These are really nice, red square trailer lights that are corrosion resistant and feature a replaceable lens and bulb. I have attached a couple short video demonstrations on these lights, along with an installation video that you might find...
    view full answer...

  • Replacement Tail Light for 1998 Jayco Travel Trailer
  • Trailer manufacturers do not often maintain original parts information (or availability) for items such as lights, but we can certainly help you find a suitable replacement. You may want to just install a whole new light kit like # TL29BK or a high-efficiency LED kit # TLL9RK. This will avoid the same problem of no replacement part if the other light on your trailer should be damaged. Both kits include lights, a license plate bracket and all hardware. If you prefer to replace just...
    view full answer...

  • Replacement Left Taillight for a 2006 8000HD Snowbear Utility Trailer
  • I pulled up a couple pictures of a 2006 8000HD trailer by Snowbear and it looks like the correct taillight you would need is the # ST9RB.
    view full answer...

  • Preferred Method of Grounding Trailer Lighting Circuits
  • Running a direct ground up to the trailer tongue or junction box would certainly work, but the only time I'd see that as being necessary is if the lamps were connected to a non metallic structure or a metallic structure that wasn't directly connected to the trailer frame. If the lamps aren't connected to a metal structure in direct contact with the trailer frame, you can use a short length of # DW02359-1 wire with a # DW05702-1 ring terminal on each end to serve as a jumper wire that joins...
    view full answer...

  • How to Connect Trailer Wiring to Optronics # ST8RB and # ST9RB Trailer Tailllights
  • If you have the Optronics # ST8RB and # ST9RB, no connector is needed. On the back of the taillight, there is a hole for the stop/turn and a hole for the running light wire. Each of these holes will have a smaller hole directly below it. Strip back the insulation on the wire by about a 1/4 inch, twist the copper strands of each wire tightly and push it into the hole in the back of the lamp as you're pushing a small screwdriver into the smaller hole. Once the wire is fully inserted, remove...
    view full answer...

  • Installation of Bulb in Optronics Trailer Light
  • The Optronics Trailer Light # ST8RB for the right hand side and # ST9RB for the left has a shockproof socket for the bulb to insert into. The replacement bulb is # A1157B.
    view full answer...

  • Is the Optronics Tail Light # ST8RB Compatible with 3 Wires for Trailer Light Functions
  • The Optronics tail light part # ST8RB that you referenced actually doesn't come with any wiring at all. The back of the assembly has holes in it for quick connecting of your light functions. Simply insert the stripped wire into the appropriate slot. This is the passenger side light assembly. For the driver's side assembly you will need part # ST9RB. Attached are some reviews videos and an installation video for you to reference.
    view full answer...

  • Utility Trailer Light Wiring Diagram and Required Parts
  • I have attached two basic trailer light wiring diagrams of utility trailers for you to check out. The difference between the two diagrams is the type of wiring harness that is being used. Diagram 1 shows a traditional wiring layout with jumper wires to provide running light functions for both sides of the trailer and Diagram 2 shows a wishbone harness. The wishbone harness has two running light wires, one for each side of the trailer. Diagram 2 is the preferred method and it is more common...
    view full answer...

  • How to Wire Optronics Right-Hand Trailer Stop, Turn and Tail Light, Part # ST8RB
  • The Optronics Right-Hand Trailer Stop, Turn and Tail Light, Part # ST8RB, connects with two wires. On the rear of the housing are holes to accept bare wire and underneath each one is a smaller hole that serves as a wire release; just insert a small pin (or something like a paper clip) to release the wires. The left-hand matching light is part # ST9RB. If you refer to the included photo illustrating a trailer-side 7-way connector you will be able to see which two wires from the connector...
    view full answer...

  • Replacement Bulb for Optronics 7-Function Trailer Light # ST9RB
  • It looks like you are are using Optronics 7 function trailer light # ST9RB, which you referenced. The replacement bulb for this light is # A1157B. The Optronics replacement bulb, # A1157B , is a dual filament bulb. The double-filament design works for combination brake, tail and turn lights.
    view full answer...

  • Wiring Trailer Stop, Turn, Tail and License Plate Light, # ST9RB to a Trailer
  • When wiring Trailer Stop, Turn, Tail and License Plate Light, # ST9RB, how you wire it depends on the type of wiring harness you have on the trailer. If you are using a 4-Way flat that includes one tail light wire, you will need to attach a jumper wire to go from one light to the other for running lights like you have described. There is also what is called a wishbone harness, like # A35W42B. This type of harness has the tail light signal split at the plug. There are then two separate...
    view full answer...

  • Can Redline Light Guard be Used with Optronics ST8RB and ST9RB Tail Light Assemblies
  • The Redline Light Guard # LG440NP referenced in your question is designed to fit the Peterson Square Trailer Tail Light # 432400 and # 432200, however it can also fit other tail light assemblies. The Optronics Tail Lights # ST8RB and # ST9RB that you also mentioned feature very similar dimensions to the above Peterson assemblies and will absolutely work with the Redline Light Guard. The guard itself has an inside dimension of 5-1/2 inches wide, 5 inches high and 3 inches deep. This will...
    view full answer...

  • The Optronics Trailer Light, # ST9RB, Is Not Working On Trailer Lights With Separate Ground Wire
  • The Optronics Trailer Light, # ST9RB is a stud mount light that is grounded through the mounting studs. The lights on your trailer are using a separate ground wire. You will have to run a ground wire to the stud to be able to ground the light. I have the Optronics Trailer Light, # STL9RB. This is a same size light with the same features, but has LED lights instead of the incandescent lights. It is not grounded through the studs so it has the three wires ( brown, yellow, and white) like...
    view full answer...

  • Recommended Replacement Trailer Lights With Side Lights For Small Utility Trailer
  • We have just what you are looking for. I recommend the LED Submersible Trailer Stop, Turn and Tail Light, part # STL8RB. This is for the right side of the trailer and is a stud mounted LED light. It has the side marker light that illuminates when the running lights are powered. For the left side of the trailer you will want part # STL9RB. I have attached a product review video and have also attached a drawing that shows the dimension for these lights you can take a look at.
    view full answer...

  • Does Optronics Tail Light Lens A90RB Include a Clear Portion for a License Plate Light
  • This lens is meant to be used as a replacement to the Optronics tail light, part # ST90RB. It does not have a clear portion for a license plate light. You are looking for a light like Optronics part # ST9RB or part # STL9RB. You could also use Optronics part # ST17RB. I have linked to these parts below.
    view full answer...

  • How To Connect Optronics Trailer Lights # ST8RB and # ST9RB To a Trailer
  • The quick connect feature on the Optronics Light, part # ST8RB, and part # ST9RB, means that you can connect the wires by inserting them into the four holes on the back of the light. It is not referring to a separate part. The wires would be stripped about 1/4 inch and pushed into the correct hole on the back of the trailer light. The holes are marked with the tail light function that the hole provides. The wire when pushed in the hole will automatically lock in place and give you a...
    view full answer...

  • Is There More than One Bulb in Optronics ST8RB and ST9RB Trailer Lights
  • For the trailer lights # ST8RB and # ST9RB there is only one bulb inside the housing and it is a 1157 like you mentioned. For a replacement you would want the part # A1157B. The light from the one bulb lights up the side and the front of the assembly.
    view full answer...

  • Is Bulb Already Installed on Trailer Stop, Turn and Tail Light
  • Yes, the Trailer Stop, Turn and Tail Light, 6-Function, Right Hand # ST8RB does come with the bulb installed. The matching light for the left side of your trailer is the Trailer Stop, Turn, Tail and License Plate Light, 7-Function, Left Hand # ST9RB, which also has the bult installed.
    view full answer...

  • Customer Advice for Installing Wiring to the Optronics Taillights part # ST9RB
  • Thank you for the advice, and we appreciate you not charging us!
    view full answer...

  • Trailer Stop, Turn, Tail and License Plate Light Connection Not Staying Strong
  • We recommended stripping the wire 1/4 inch and pushing through the hole. If this does not work and the wire keeps releasing, it may be faulty. Do not attempt to solder the wire. You may call us at 1-800-298-8924 for further assistance.
    view full answer...

  • Installation Method for Optronics 6-Function Trailer Stop, Turn and Tail Light # ST8RB
  • The Optronics 6-Function Trailer Stop, Turn and Tail Light # ST8RB that you referenced does not require a bracket for installation. This light is of the type that uses the two threaded mounting studs, spaced 2-inches apart, to attach to your trailer. These mounting studs also serve a second purpose; they provide the ground connection to complete the electrical circuit. Please refer to the linked video. Certainly if you wanted to mount these with a bracket you could use a simple L-bracket...
    view full answer...

  • Recommended Replacement LED Lights For Trailer That Keeps Blowing Fuses
  • The wires with the circuit you are using are not big enough to handle the draw you have so increasing the fuse is not recommended. I recommend replacing the lights you have with LEDs. The replacement for the # ST9RB lights you have now would be part # STL9RB. These draw about 1/10 of the amperage draw the # ST9RB does. This would decrease the draw on your system and a larger fuse would not be needed. Occasionally when LED lights are installed you will have what is called hyperflash,...
    view full answer...

  • Difference Between Optronics Left Hand # ST8RB and Right Hand # ST9RB Trailer Lights
  • It sounds like you are referring to the Optronics Right Hand Trailer Light # ST8RB and the Left Hand # ST9RB. The only difference between the two assemblies is that the Left Hand/Driver's Side unit features an additional license plate light to illuminate the trailer's license plate. I have attached a couple short video demonstrations on these lights that you can also check out.
    view full answer...

  • What Does Shock Proof Socket Mean for Trailer Lights?
  • As you mentioned, some of the trailer lights like the Optronics Trailer Stop, Turn, Tail and License Plate Light, 7-Function, Left Hand # ST9RB state that they have a shock proof socket. The manufacturer specifically makes the housing so that the socket has a little bit of play for vibration and road shock built in and they term that a shock proof socket. It just ensures the socket isn't mounted so rigid that the bulb has no give and shatters. This vibration dampening design helps the...
    view full answer...

  • Replacement Trailer Taillight Lens for Optronics Trailer Taillight # ST9RB
  • We do have replacement lenses for the Optronics trailer taillight # ST9RB that you referenced. For that you'd just need the # A8RB this would be the easiest solution.
    view full answer...


Do you have a question about this Trailer Light?




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Info for this part was:

Expert Research:
Michael H
Expert Research:
Jeff D
Expert Research:
Jameson C
Updated by:
Adele M
Updated by:
Laura H
Updated by:
Sarah W
Updated by:
Brian T
Video Edited:
Dustin K
Installed by:
Cole B
Installed by:
Randy B
Video by:
Zach D

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