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Optronics Combination Trailer Tail Light - 6 Function - Incandescent - Red Lens - Passenger Side

Optronics Combination Trailer Tail Light - 6 Function - Incandescent - Red Lens - Passenger Side

Item # ST8RB
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Optronics Combination Trailer Tail Light - 6 Function - Incandescent - Red Lens - Passenger Side Red ST8RB
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5-5/16" x 4-9/16" Square. Incandescent trailer tail light serves 6 functions on trailers under 80" wide: brake, tail, turn, side marker, side reflector, and rear reflector. Shock proof sockets. Stud mount. Quick connect wiring. Lowest Prices for the best trailer lights from Optronics. Optronics Combination Trailer Tail Light - 6 Function - Incandescent - Red Lens - Passenger Side part number ST8RB can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (413)
  • Q & A (35)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - ST8RB

  • Tail Lights
  • Square
  • Incandescent Light
  • Red
  • Surface Mount
  • 5L x 5W Inch
  • Non-Submersible Lights
  • Optronics
  • Stop/Turn/Tail
  • Side Marker
  • Side Reflector
  • Rear Reflector

5-5/16" x 4-9/16" Square. Incandescent trailer tail light serves 6 functions on trailers under 80" wide: brake, tail, turn, side marker, side reflector, and rear reflector. Shock proof sockets. Stud mount. Quick connect wiring.


Features:

  • Trailer tail light serves 6 functions on trailers less than 80" wide
    • Stop, Turn, Tail, Rear Reflex, Side Marker, and Side Reflex
  • Built-in reflex reflectors remove the need for a separate reflector
  • Shock-proof socket protects the bulb
  • Incandescent bulb can be easily replaced
  • Red lens over 2 bulbs
  • Durable polycarbonate housing and acrylic lens
  • Stud mounts on trailer with included studs
  • Quick connect wiring - simply insert stripped wire into holes for a secure connection
    • Light grounds through mounting studs


Specs:

  • Configuration: passenger side
    • Driver side: ST9RB (sold separately)
  • Dimensions: 5-5/16" long x 4-9/16" wide x 2-7/8" deep
  • Distance between mounting studs (center on center): 2"
  • Power draw at 12.8V:
    • Stop/turn: 2.5 amps
    • Tail: 1 amp
  • 3-Year warranty


Manufacturer Cross Reference
Light will work as an exact replacement for:

  • Uni Bond # TL4400
  • Wesbar # 3060
  • Graote # 52302
  • Peterson # 440

Optronics ST8 Series Universal Mount Combination Tail Light Diagram

ST8RB Optronics Universal Combination Tail Light for Trailers Under 80" - 6 Function - Incandescent - 2 Bulbs - Right Hand

Alternate part number: ST-8RB




California residents: click here



Customer Reviews

Optronics Combination Trailer Tail Light - 6 Function - Incandescent - Red Lens - Passenger Side - ST8RB

Average Customer Rating:  4.8 out of 5 stars   (413 Customer Reviews)

5-5/16" x 4-9/16" Square. Incandescent trailer tail light serves 6 functions on trailers under 80" wide: brake, tail, turn, side marker, side reflector, and rear reflector. Shock proof sockets. Stud mount. Quick connect wiring.

- ST8RB
by:

These light were a good replacement set for my Home Depot Snowbear trailer taillights. Best price I found for this or similar was here at etrailer.com. Pic is not of my own trailer but is the same model. You can see the configuration of the taillights. 744771



- ST8RB
by:

The light is a well built taillight and works great. The service at etrailer is always great.... as well as fast, easy and delivered quickly. What a great place to get all your trailer needs. Thank You! 728805



- ST8RB
by:

Great product at a great price. I replaced both trailer lights and these look fantastic. Not as bright as I would like, but I think that's the trailer wiring, since the first light I replaced was very bright, and now both are rather dim, but they work and that's what's important. 854667



- ST8RB
by:

Great service! my order was delivered as promised with etrailer communicating with me each step of the way. Videos were extremely helpful during installation. Highly Recommend etrailer. 855238



- ST8RB
by:

I was able to correct my order before shipment with no problems. Got package the day promised. Only issue is I got no paperwork with my purchase. Overall no complaints. 851234



- ST8RB
by:

received quickly 850680



- ST8RB
by:

The company went above and beyond to ship me a new unit when original on was lost in transit. This unit was easily installed and replaced my damaged one perfectly. 850659



- ST8RB
by:

OEM quality for a discount price! 845692



- ST8RB
by:

I got exactly what I needed to repair my trailer - the lift and two lights. Products were delivered 2 days earlier than originally indicated. Everything was as expected. Great products and service 837762



- ST8RB
by:

working like a charm 822167



- ST8RB
by:

Came in on time and I used it rptht day to complete a project I was working on. Great product, great customer service. Thank you ETrailer 821802



- ST8RB
by:

My order came very fast, and I was very satisfied with the lights. 810030



- ST8RB
by:

great product!! 807407



- ST8RB
by:

These are exactly what we needed to replace broken lights. Install is simple. Thanks! 803813



- ST8RB
by:

Just picked up a couple of utility trailer lights..etrailer was GREAT to deal with... Instructional/comprehensive videos and many Q&A's pertaining to my purchase were provided which made my install a snap! Good folks! Thank You etrailer 802767



- ST8RB
by:

Great price 787139



- ST8RB
by:

Arrived on time, easy to install, and still working a year later. 783026



- ST8RB
by:

The trailer lights were shipped and delivered in a reasonable time and the price paid was very good. I appreciate the timely communications that kept me updated on the status of the order. 776148



- ST8RB
by:

Good choice on my part. I am about to place another order with them. 773846



- ST8RB
by:

Good quality product.very fast shipping.reasonably priced and reasonable shipping.better than most customer service.7 771545



- ST8RB
by:

This unit is working perfectly. The old unit was intermittent and caused safety issues while on the road with the trailer. The new unit has operated perfect so far. 766647



- ST8RB
by:

Perfect replacement for broken one 766506



- ST8RB
by:

An exact replacement for the broken one on my trailer. 766116



- ST8RB
by:

Lights were as described and they work just fine. Easy to install. 765885



- ST8RB
by:

Great product perfect match, and work g reat. 758841


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Show More Reviews

Ask the Experts about this Optronics Trailer Lights

  • Are the ST8RB and ST9RB Submersible Lights
    I have a solution for you, but neither the # ST8RB nor # ST9RB are submersible lights. Instead, you'll want to use the # ST6RB and # ST7RB - which are the submersible versions of those lights. These are still incandescent tail lights that look exactly the same, have the same dimensions and are the same 2 wire electrical system, they're just sealed up so that they can be safely used on boat trailers.
    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...
  • 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...
  • 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...
  • Using a Circuit Tester to Find Taillight Functions on a 1985 Ford F-250
    I actually do have a diagram that you can look over to help with wiring trailer lights and the 4-Way wiring harness. I have included a link to the page below. The best way to find the functions of the wires on the 1985 Ford F-250 is to use a circuit tester like # 40376. You will need to test the wires behind each taillight for function. Behind the left taillight, the wire that carries a signal in unison with the blinker connects to the yellow wire on a 4-Way harness. This also carries...
    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...
  • 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...
  • 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...
  • 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...
  • How to Change Light Bulb in Optronics ST8RB Trailer Taillight
    Changing the bulb is simple. Remove the screw on each corner of the front of the lens and gently pry the lens away from the housing. Be careful not to damage the gasket between the lens and the housing as doing so will allow water into the interior of the lamp. With the lens removed, you can push in on the bulb and twist it clockwise then pull the bulb free. Install the replacement # A1157B bulb in reverse order..
    view full answer...
  • How Is Trailer Wiring Connected to the Optronics Trailer Lights # ST8RB
    Stripped wire get inserted into the ports on the back of the Optronics Trailer Lights # ST8RB and that is how they are connected. Fast forward to the 2:15 mark of the video I attached to see how this is done.
    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...
  • Removing 1157 Light Bulb from Optronics Trailer Light
    The bulb that's in the # ST8RB light is an 1157 like part # A1157B. To change the bulb remove the front lens by taking off the screws and gently prying the lens away. Then to get the bulb out you'll need to push in on it a bit and twist the bulb.
    view full answer...
  • Do Trailer Lights have to be Grounded to the Main Trailer Connector Ground
    As long as each of the lights on your trailer are grounded to a clean, bare metal surface then you will be good to go. On aluminum trailers though sometimes a jumper ground does need to be run to the main trailer connector ground. But not with steel frames.
    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...
  • Can the Optronics Tail Light # ST8RB Be Used on the Left and Right Side of a Trailer
    You should not have a problem using the Trailer Stop, Turn and Tail Light, 6-Function, Right Hand # ST8RB on the left and right hand sides of your trailer. It would be just a matter of wiring up the lights accordingly. On the # ST8RB there is an arrow that points to a wiring hole with the word Green. On the right side of your trailer this will be correct, but on the left side of the trailer you would need to install the yellow wire there.
    view full answer...
  • Availability of Replacement Lens for Do-Ray 169
    I was not able to find any specifics about lighting products from Do-Ray, nor one for a lens with the reference number 169. If you can submit a photo of the part you need along with measurements I'll be glad to check for a replacement. If you prefer you can choose a new light fixture using the link provided. The link will take you to our main page for trailer lights where you can use the filters in the left margin to narrow the results shown based on the color, shape and type of light...
    view full answer...
  • Side Marker Bulb for Peterson Trailer Tail Light
    The side marker bulb on your light is likely going to be a 194 bulb, # A194B. If this bulb does not look like the bulb you are trying to replace you can check for a model number on the light housing or email me some pictures of it and I might be able to identify it. For an 1157 bulb we have # A1157B.
    view full answer...
  • Testing Trailer Wiring for Function to Troubleshoot Both Blinkers Turning on at the Same Time
    On the Trailer Stop, Turn and Tail Light, 6-Function, Right Hand, # ST8RB, the back is labled, the brake light and turn signal wire (usually green) goes in the left connectors. The taillight wire (usually brown) goes in the right connectors. It sounds like the right turn signal wire is somehow connected to both turn signals. If your trailer wires have different colors, or the colors do not match the functions described above, you will need to use a circuit tester, like # 40376, to find...
    view full answer...
  • Can the Bulb in Trailer Stop, Turn and Tail Light ST8RB Be Easily Replaced
    The bulb # ST8RB trailer tail light can definitely be replaced, and to do so is not difficult. The face of the light taken off by removing four small screws, and once this is done you have access to the bulb socket and can proceed with changing the bulb. The replacement bulb for this light would be part # A1157B.
    view full answer...
  • Running Lights Function but Brake and Turn Do Not on a 2006 Carlson Utility Trailer
    It could definitely be a ground issue. Since you were able to duplicate the same result with the same trailer on two different vehicles, than it is pretty safe to say the problem is somewhere on the trailer. I would start with the trailer connector and work back. Trace the ground wire, usually white, back from the connector. Make sure it has a good clean connection to the metal of the trailer frame. Paint, rust and corrosion can insulate connections so make sure it is good metal to metal...
    view full answer...
  • Troubleshooting Trailer Running Lamp Circuit on 2005 Ford F Series
    I am assuming you are speaking of the 7-way trailer connector. Use a circuit tester like part # 40376 on the pin in the 11:00 position on the trailer connector. If you do not have voltage on that pin while the headlights or running lights are on, you most likely have a blown fuse. The lid of your fuse box should have a legend showing which fuses protect which circuit. This information should also be provided in your owners manual. The fuses might not necessarily be located in the...
    view full answer...
  • When Should My Trailer Lights Be Working
    When the vehicle is not running and the key is in the off position, the only functions that should be working on your vehicle and trailer will be the headlights and tail lights as they are not tied into the vehicle's ignition system. If you vehicle's brake lights come on when the brake is applied, then your trailer brake lights should come on as well. It is likely the turn signals will not function while the vehicle is not running and the key is in the off position. When the vehicle is...
    view full answer...
  • Replacement Square Stud Mount Trailer Lights for Utility Trailer
    The Combination Trailer Tail Light part # ST9RB for driver side or part # ST8RB for passenger side is just what you need to replace the tail lights on a utility trailer. The lights mount via two studs which are 2" apart so they will be a direct replacement. In regards to installation, the lights ground though the studs so you only need to attach the stop/turn and running light wires for each side.
    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...
  • Comparing the Power Draw of LED Trailer Tail Light STL8RB and Incandescent Version ST8RB
    LED lights draw considerably less amperage than incandescent lights. They also run much cooler. These 2 features are why LED lights last so long. The incandescent version of # STL8RB is # ST8RB and it draws 2.5 amps for the stop/turn signal functions and 1 amp for the running light functions. And the LED version draws 0.259 amps for stop/turn functions and 0.062 amps for running light functions.
    view full answer...
  • 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...
  • 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...
  • 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...

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Info for this part was:

Expert Research:
Mike L
Expert Research:
Sarah L
Expert Research:
Patrick B
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Updated by:
Adele M
Updated by:
Laura H
Updated by:
Sarah W
Updated by:
Brian T
Video Edited:
Dustin K
Installed by:
Randy B
Video by:
Zach D

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