Optronics Trailer Tail Light - Stop, Turn, Tail - Incandescent - Round - Red Lens
(120 reviews)
Price: $13.47
In Stock
Optronics Trailer Tail Light - Stop, Turn, Tail - Incandescent - Round - Red Lens
Item # ST40RB
Retail:$16.08
Our Price: $13.47
You Save: 16%
In Stock
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- All Info
- Reviews (120)
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Optronics Trailer Lights - ST40RB
- Tail Lights
- Round
- Incandescent Light
- Red
- 5-3/8 Inch Diameter
- Recessed Mount
- Stop/Turn/Tail
- Non-Submersible Lights
- Optronics
5-3/8" Diameter round. Incandescent trailer light provides stop, turn, and tail signal. Shock-proof socket protects bulb against damage. Durable steel housing. Flush mount to trailer - hardware not included. 2-Wire design. (1) 2057 bulb.
Features:
- Round incandescent trailer light serves 3 functions
- Stop, turn, and tail
- Shock-proof socket protects bulb against damage
- Incandescent 2057 bulb can be easily replaced
- Durable steel housing
- Red acrylic lens over bulb
- Compatible with 12V DC systems
- Flush mount to trailer with flange - hardware not included
- Requires cutout
- 2-Wire design includes power lead and ground wire
Specs:
- Dimensions: 5-3/8" diameter x 1-9/16" thick
- Bulb type: 2057
- Power draw at 12.8V:
- Stop/turn: 2.4 amps
- Tail: 0.49 amps
- 3-Year warranty
Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # TL4300R
Truck Lite # 80334R
Grote # 50232
Peterson # 413/425
ST40RB Optronics Trailer Tail Light - Stop, Turn, Tail - Incandescent - Round - Red Lens
Alternate part number: ST-40RB
California residents: click here
Customer Satisfaction Score:
99% were satisfied with this product
1% of customers were not satisfied
- Wrong item was ordered
Customer Reviews
Optronics Trailer Tail Light - Stop, Turn, Tail - Incandescent - Round - Red Lens - ST40RB
Average Customer Rating: 4.7 out of 5 stars (120 Customer Reviews)
5-3/8" Diameter round. Incandescent trailer light provides stop, turn, and tail signal. Shock-proof socket protects bulb against damage. Durable steel housing. Flush mount to trailer - hardware not included. 2-Wire design. (1) 2057 bulb.by: Paul04/23/2021
I wanted to change out the rear lights on my 1949 Chevy 3600.
This is a daily driver for me, not some show truck, so I wanted to protect the lights as well.
I started with a piece of 6” schedule 40 pipe. Then I cut a disk to mount the lights on with a hole saw and welded them in place.
I cut a slot into the bottom of the driver’s side light and milled a matching slot in the pipe. This was to allow light to shine down on the license plate.
Then a drilled and tapped #6-32 holes in the edge of the pipe so that I was able to screw the protective expanded mesh onto it.
Last, I primed and painted them up to match as close a possible.
Very happy with how it all turned out.
by: Mike S. Columbia TN07/11/2012
this was a very easy install. the holes were already there to place the lights. I ran new wiring from the hitch all the way to the lights. I brought the wiring in near the circuit box up front and ran it in the cupboards to the rear. (it was easier to run new wires, the old ones were pieced together) I also was able to get the dents out and stablize the bottom of the wall. I would recomend redoing the wires when you do this. It saves a lot of headaches trying to figure where your wire may be bad. The old lights were big and boxy.
Lisa G.
5/23/2013
what type of camper and year is that?
Lisa G.
5/29/2013
This is to answer Lisa Gs question. the year is 1973 and the camper is a Serro Scotty
by: John F02/19/2015
I often recommend Etrailer to people in my community of RV repair and Renewable Energy. I wish someone would do a video on how to replace hubs-wheels-bearings on older travel trailers with the Dayton-Dexter-Fayette Star wheels and include details on how to identify the axle and weight class. If you want to see what your products have been used on, heres an Example. I bet you never thought Etrailer would be the source for parts on a wind turbines pivot, shaft and furling parts!
JOHN
by: Dave03/01/2018
Very nice light. It flush mounts and is a easy install. I needed something of this type for my bantam trailer rebuild and these worked great
Dave
3/1/2019
After a year of being submerged in creek crossings, surviving being beat on washboard and washed out roads the lights are still working great and bright as ever.
by: Chris 05/03/2024
GREAT LIGHTS!
by: William 02/03/2024
Easy to install. Works well. Just like the original. I would buy again, if I need to.
by: Greg09/24/2018
Thank you very much perfect fit just like it was made for it. Do you know how can find out more about this trailer?
Heather A.
10/5/2018
It looks like an old livestock or horse trailer. The stamp on the back that says longhorn trailer company in Wichita falls, Texas closed in 2014. They were open for 68 years so its hard to tell how old it is.
by: Fred P.03/16/2013
The Right Light at a GREAT PRICE! Easy to install and exactlly what was needed for my 1952 Stewart Coach. So glad I found your site and will continue buying all of my trailer needs with etrailer.com.
by: Peter05/20/2018
Light was inexpensive but still well made. Easy to install - replaced the rusted out tail lights on my cattle trailer
by: Robert02/01/2018
Work great, easy to install.....4.5 inch hole saw does the trick.
by: Richard 10/08/2023
Fit perfectly, nice look, great quality. Thank you
by: Keith A.08/22/2019
I purchased the Optronics Trailer Tail Light - Stop, Turn, Tail - Incandescent - Round - Red Lens for my camper. They were an exact match to the originals! Easy to order, great price, received quickly, easy to install, quality construction, just what I needed. Super service, I couldn't be more pleased or impressed with your company. A true pleasure doing business with you!
by: Mac10/15/2022
Perfect replacement for the tail lights on my old trash trailer. Mounted the lights and new wiring in an hour.
by: secondyouthjerry09/25/2016
I purchased these to provide a look that I wanted on my 1954 1/2 ton flatbed.
I have only put 12 volts to them for test purposey to this point in time. I have been working on this project since 1999. It is now in it's final stages of construction as the body parts are now being painted. The, the lights, were placed in a 2x6 inch tube, on the end, to look like stop and turn lights on vehicles of that period in time, in the bumper. I went for the bulb look, not the l.e.d. for the look. Very happy with my choice.
by: carl08/12/2015
Installed the trailer lights and found problem with the outboard right light. The trailer has one light on the fender and two lights embedded in the tail cross piece. The problem was that when the running lights were on the outboard light was on the high side of the bulb and when grounded came on as a stop light. I spent several hours tracing wiring and got nowhere until I substituted an old square light and found that the problem went away. It seems that the pigtail that is in the bulb socket was installed with the low side in the high side hole and the notch matched up with the correct axis making the problem confusing and hard to detect. Although the bulb orientation was correct power application was not. Removed the wires and re-inserted them in the correct position and problem was rectified. Quality control problem? Otherwise great product at a great price
by: Jack D.04/03/2017
Product Review:I had these type lights on an old Toyota rust-bucket with a wooden bed which still is my most loveable vehicle; can't find these lights locally (N/W NC mountains); found your ad online and hoped these would match those already on the Toy and replace some damaged and rusty; couldn't believe I could get exact replacements, but I sure did; order date March 29 early AM, mailman handed them to me April 31 at 1 PM at my house "in the same year!" They had traveled, according to map, across from the edge of Missouri through the southern edge of Indiana, across the length E-W of Kentucky, SW Virginia to Greensboro, NC, then backtracked on land back to my home via USPS to me. Put them to your ear and you could still hear the Mississippi!!
Give it a big 5 stars!
by: Perry S06/18/2013
I have been building trailers and truck beds for a while. I really like using the flange mount vs the rubber gasket and you can replace the bulb instead of a new light assembly.
by: Robert07/31/2019
Didn't notice the snap ring. Very convenient if used on a trailer but not what i wanted for my golf cart. Although they did fit in it perfectly i won't use them on the cart. Trading them out with my car hauler. Same size. Nice lights though.
by: Scott S09/02/2015
Just the right replacement fixture for my trailer and sent out promptly by the folks at etrailer. Thanks!
Scott S.
9/8/2016
It still works great!
by: JW06/12/2021
Tail lights work great. Everything was included that needed to be. Used them on two old trailers, making them more visible and legal. Fast service. Great price.
by: Gary07/07/2019
The groove for the retaining ring is virtually nonexistent. Tap or jiggle it a little bit and the ring pops out and then the lens. I had to apply a couple dots of clear caulk around the lense and ring to keep them in place. But it works for a $5 taillight.
by: Tail lights10/07/2016
Fit and finish of these lights is good but the quality of the electrical sockets is very poor and don't function properly! I installed and will see how long they last. I won't purchase these lights again
by: Paul R.06/05/2017
Every item works fine! Parts were delivered in a timely fashion. Installation went well on a 25 yr old trailer. Thanks for being a source for repair parts on this older equipment!
25
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Show More Reviews
See what our Experts say about this Optronics Trailer Lights
- Optronics Trailer Tail Light Replacement Lens ClipWe do have a clip for the Optronics Trailer Lights, part # ST40RB. It is the Replacement Snap Ring, part # A40SRB. I've linked to a video installation of this light on a trailer.
view full answer... - Installation of Tail Light Lens Using Retainer Snap RingThe Replacement Tail Light Lens # A40RB is not held on with screws. The outer bezel housing of the 4-1/2" Round Trailer Stop, Turn and Tail Light, Flange Mount, 3-Function # ST40RB for instance has the housing held by screws and the lens is held by the metal snap/retainer ring and indentation in the housing. That Replacement Retainer Ring # 410-21 is a separate item.
view full answer... - How to Determine the Functions of the Trailer Wiring on a Triton TrailerMost likely the white is ground, the brown is tail lights, the green is right turn/brake and the red is left turn/brake, but since the colors are a little different than the standard I would recommend you wire the trailer by function instead of color. This way you will eliminate and guess work and you will know that your trailer is wired correctly. The easiest way to do this would be to get a car battery and use a jumper cable to put current on each wire to see what tail light functions...
view full answer... - Do Bulbs Come with Optronics Lights ST40RB, MC32RB, MC32ABYes, the bulbs do come with the Optronics Lights # ST40RB, # MC32RB and # MC32AB. They are already installed in the lights assemblies so all you will need to do is wire up the assemblies and you will be good to go. I attached review videos for the # MC32RB and the # MC32AB for you to check out also.
view full answer... - Reverse Lights Illuminate With Running Lights On In Vehicle If the reverse lights on the trailer are on while the running lights in the vehicle are activated you most likely have a short between the reverse light wire (usually purple) and the running light wire (usually brown) on the trailer. Therefore, you will need to trace each of these wires back from the trailer side connector to make sure they have not shorted out to one another. I also recommend that you check the pins inside the trailer side connector for corrosion. Please note, aluminum...
view full answer... - Replacement Lens for Grote 5023 and Truck-Lite Trailer Tail LightsI do have an option for you but as we do not carry the trailer tail lights that you have, we would not have the correct replacement lens for you. That said, I can only imagine you will have a hard time trying to find an exact replacement as replacement lenses for old trailer lights are pretty hard to come by. Therefore, I recommend you replace the entire light as this is really your best option, the Optronics Trailer Tail Light part # ST40RB is very cost effective and is easy to install...
view full answer... - What is the Difference Between a Snap Ring and Retainer Ring for a Trailer Tail LightThere really isn't a difference. Snap-ring and retaining ring such as # 410-21 are two names for the same thing. If your tail light looks like # ST40RB then use # A40SRB. But you mentioned that the light was 4 inches, which is what Peterson light # 429800 is. So for that light use # 410-21. Shipping can vary depending on the option you choose and where you live. So take a look at the link to the right that explains more about shipping and how to determine cost.
view full answer... - Looking for 2-1/2 to 3 Inch Clear Round Trailer LightIt depends on what type of light you are looking for. If you want a tail light assembly then it would have to have a red reflector on it to be DOT approved. If you are looking for a utility light (white light) then we do have some available, # UCL60CB or # UCL50CB. As far as just a lens we have some clear ones but they are over 4 inches in diameter.
view full answer... - Can Optronics Trailer Taillight # ST40RB be Used with 6 Volt BulbYes, since the Optronics light part # ST40RB uses a 2057 style bulb you would just need to source a 6 volt 2057 bulb and you'd be set.
view full answer... - Comparing Optronics # ST40RB and Optronics # STL003RFLB Trailer LightsAside from the Optronics # ST40RB having an incandescent bulb and the Optronics # STL003RFLB being LED the only other big difference is that the first part grounds through the mounting hardware while the LED version grounds through a wire. This is why one unit has 2 wires and the other has 3. We have 2 pigtail options for the LED verison for you to use. Part # A45PB has the wires coming straight out of the plug while part # A47PB has a right angle for tight spacing where your lights mount. I...
view full answer... - Trailer Back-Up Alarm Sounding when Brakes are AppliedThe back up alarm feed should be tapped into your reverse lamp lead, it sounds as if it is wired incorrectly. Each turn/brake lamp can be wired in series with a feed from your junction box, with one feed for the drivers side and another for the passenger. The same goes for your running lamps. You would take the feed for the drivers side brake/directional lamp which is usually a yellow wire, and run it along the rear of the trailer, feeding each of the two directional/brake lamps as you...
view full answer... - Trailer Running Lights Do Not Work Using Tail Light # ST40RBIt does sound like a ground problem. Use a circuit tester such as # PTW2993 if you do not already have one to test the running light wire at the back of taillight # ST40RB. If there is no power at the running light wire, then the issue is not at the light but further up on the trailer or tow vehicle. If there is power to the wire then the issue is most likely that the circuit is not being completed because of a bad ground. This tail light grounds through the mounting hardware so it will...
view full answer... - Troubleshooting Running Lights Circuit on a Travel Trailer Tail Light HarnessSince you have tested the 4-Way connector on your vehicle and it is working properly, it leads me to believe that the wiring of the lights is incorrect. You will want to make sure that the fuse for the running lights on the vehicle is not blown. It sounds to me like the lights you have only have two wires coming out of the back for wiring to the trailer connectors wiring. If this is the case then the red wire will connect to the yellow (left) and green (right) wires on the trailer lights....
view full answer... - Wiring Instructions for Optronics 4-1/2 Inch Round Trailer Stop Turn and Tail Light # ST40RBThanks again for ordering with etrailer.com, we appreciate your business. As for the ground, you are correct, the light housing on the Optronics 4-1/2 Inch Round Trailer Stop, Turn, and Tail Light, # ST40RB, doubles as the ground. Now for the green and black wire, the green wire is for the running light circuit and the black wire is for the turn signal and brake light circuit. I have attached a short installation video for you.
view full answer...
- Magnetic Flat Towing Tow Bar Wiring Kit Flashes Both Turn Signals Instead of Just OneOn a 7-Way, just as a 4-Way, the turn signals and brake lights are combined on the same circuit on each side. So yellow is left turn and brake, green is right turn and brake, brown is running lights, and white is ground. Usually when there is a red wire it is brake lights. But on a combined system like this the brake lights should be combined with the turn signals. There could be a short that is causing both turn signals to activate at the same time. You will want to inspect the wiring...
view full answer... - How to Remove Tail Light That Has Rivets Holding the Grommet in PlaceIt all depends on how the light installs. If it is like the Optronics part # ST45RB that installs with the grommet # A45GB then you should be able to remove it without removing the grommet. You may need access behind the light to do this though. If your tail light is more like the Optronics part # ST40RB though where the grommet is part of the light then you will need to remove the rivets by drilling them out and then use new rivets or even screws to install the new tail light (or the...
view full answer...
- Troubleshooting the Brake Light Function of the Optronics Round Trailer Light part # ST40RBThe Round Trailer Stop, Turn and Tail Light # ST40RB that you referenced grounds through the mounting hardware. A weak ground could definitely cause the brighter illumination of the # ST40RB to not function. I would make sure that this light is installed on a clean metal surface that touches the frame of your trailer. If not, you could run a jumper wire from the mounting hardware of the light to the frame of your trailer to improve the light's grounding. You could also test the assembly...
view full answer... - Trailer Clearance Lights Show Power but Some Will Not Light UpIt is possible that the clearance lights are not working if you have a lot of clearance lights. This can overload the trailer wiring on the vehicle side and cause some of the lights not to work. You can check the amperage draw per clearance light by testing one at a time using a multimeter such as # PT89ZR. Switching everything over to LEDs will be much better because they draw only a fraction of the power compared to incandescents. Another possibility is a poor ground connection. All...
view full answer... - What are the Wire Functions on Trailer Tail Light # ST40RBTrailers have tail lights that have a combined brake and turn signal on the same circuit. For light # ST40RB as an example, the green wire carries right turn and brake lights. The brown wire is only running lights. It sounds like you attached the brown and yellow wires on the tail light to the brake and turn signal wire from the trailer connector. The trailer connector at the front of the trailer should have 4 wires coming out of the back of it. The covered pin is the ground wire. The...
view full answer... - Power is Getting to the Trailer Lights But they Will Not Light UpUse your circuit tester to test the wiring directly at the back of the lights. If the power is not getting to that point then there is a wiring issue that you will need to track down and repair. If power is getting to the light and the light is not coming on then the issue is either a weak or bad ground or there is something wrong with the light. The ground needs to be attached to a clean and corrosion free bare metal surface. Try moving the ground to a different location or run a jumper...
view full answer... - With Trailer Connected Truck Reverse Lights and Trailer Brake Lights Are Not WorkingIt sounds like you might have a few different issues going on here. First, we need to test the vehicle side 7-Way connector to make sure it is working properly. Use a circuit tester such as # PTW2991 to test the pins on the connector while someone sits in the truck and runs through the light functions. If something does not work then you will need to determine the problem. Check the trailer connector for corrosion inside and out. Corrosion can cause all sorts of issues, so can ground...
view full answer... - Troubleshooting No Trailer Running LightsI would begin by testing the trailer connector on the vehicle to rule that out. Turn the headlights on and use a circuit tester like part # PTW2993 to test the socket on the connector fed by the brown wire. If you are not getting a signal on this pin, you might have a blown fuse. Make sure the ground wire from the connector on the trailer is securely grounded to the trailer frame and that each lamp is grounded to the trailer frame either by an individual ground wire connected to the trailer...
view full answer... - Which Wires Serve What Function on Optronics Light ST40RBThe green wire is for the brakes and turn signals and the black wire is for the tail lights .
view full answer... - Replacement LED Trailer Light to Reduce Power DrawThe Optronics LED Trailer Light # STL42RB is not what I could call an exact replacement for the # ST40RB but for all purposes it will be what you're looking for. The # STL42RB is 1/8 inches larger in diameter and 3/8 inches deeper so at the most you may need to do a little filing to the opening for the light in your trailer to install it. The mounting flange is metal. There is also a Stainless Steel Trim Ring # A5TRSSB available. It does not include a gasket, however If you would prefer...
view full answer...
Do you have a question about this Trailer Light?
Info for this part was:
Expert Research:
Mike L
Expert Research:
Robert G
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Video by:
Kathleen M
Updated by:
Laura H
Updated by:
Brian T
Video Edited:
Dustin K
Installed by:
Cole B
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Paul
4/24/2022
GREAT- Everybody love them.