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Optronics Trailer Turn Signal and Parking Light - Submersible - Incandescent - Oval - Amber Lens

Optronics Trailer Turn Signal and Parking Light - Submersible - Incandescent - Oval - Amber Lens

Item # ST70AB
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Optronics Tail Lights - ST70AB
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6-1/2" x 2-1/4" Oval. Waterproof, incandescent trailer light acts as a parking light and turn signal. Shock-proof socket. Durable polycarbonate housing and lens. Recessed mount with grommet (not included). Accepts standard 3-prong plug. Lowest Prices for the best trailer lights from Optronics. Optronics Trailer Turn Signal and Parking Light - Submersible - Incandescent - Oval - Amber Lens part number ST70AB can be ordered online at or call 1-800-940-8924 for expert service.
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Optronics Trailer Lights - ST70AB

  • Tail Lights
  • Oval
  • Incandescent Light
  • Amber
  • 6-1/2L x 2W Inch
  • Recessed Mount
  • Turn
  • Parking
  • Submersible Lights
  • Optronics

6-1/2" x 2-1/4" Oval. Waterproof, incandescent trailer light acts as a parking light and turn signal. Shock-proof socket. Durable polycarbonate housing and lens. Recessed mount with grommet (not included). Accepts standard 3-prong plug.


  • Oval incandescent trailer tail light serves as a parking light and turn signal
  • Sonically sealed, waterproof housing and lens unit is submersible
  • Shock-proof socket protects bulb
  • Incandescent bulb is easy to replace
  • Durable polycarbonate lens and housing
  • Amber lens over incandescent bulb
  • Compatible with 12V DC systems
  • Recessed mount with grommet (A70GB - sold separately)
    • Mounts in any 360 degree position
  • Accepts industry standard 3-prong plug (A45PB or A47PB - sold separately)


  • Dimensions: 6-1/2" long x 2-1/4" tall x 2-3/8" thick
  • Bulb type: incandescent
  • Power draw at 12.8V:
    • Turn: 2.4 amps
    • Tail: 0.50 amps
  • 3-Year warranty

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # SE2238A
Wesbar # 203564
Truck Lite # 60202Y3
Grote # 52183
Peterson # M421A
Bargman # 40-06-002

Optronics ST70 Series Parking Turn Light Dimensions

Sonically Sealed, Waterproof Trailer Light

The waterproof construction of this light makes it ideal for use on trailers that may be submerged, like a boat trailer. The housing and lens are sonically sealed together to create a single unit, which means that water will not get into the light and damage the diodes or circuit board.

ST70AB Optronics Trailer Turn Signal and Parking Light - Submersible - Incandescent - Oval - Amber Lens

Alternate part number: ST-70AB

California residents: click here

Customer Reviews

Optronics Trailer Turn Signal and Parking Light - Submersible - Incandescent - Oval - Amber Lens - ST70AB

Average Customer Rating:  4.7 out of 5 stars   (81 Customer Reviews)

6-1/2" x 2-1/4" Oval. Waterproof, incandescent trailer light acts as a parking light and turn signal. Shock-proof socket. Durable polycarbonate housing and lens. Recessed mount with grommet (not included). Accepts standard 3-prong plug.


Great replacement for my trailer! Thank you!


Lights work as desired.

Customer Service.
Repeat Buyer.


My husand has installed an aluminum flat bed on our pickup truck to replace the original rusted out one. He used the amber turn signal/ parking light to replace the red lights that came with the flat bed. The lights were a perfect fit and are just what we needed.

The trailer lights have spent time out in the rain, snow and 90 degree temperatures and are still looking and working great.
Diane P - 09/01/2017


I replace these lights on my master-tow trailer constantly. The filaments just can't tolerate the lack of suspension on the trailer when it's empty and they blow out.

No issues with the light other than that. I would recommend investing in the LED replacements rather than these.

Hello Ryan - the ST75AB lights do come with shock mounted bulbs, but excessive vibration with a lack of suspension could definitely cause problems. I would suggest moving to the STL75AB LED version. Optronics offers a LIFETIME LED Warranty, so you shouldnt see any problems no matter what type of vibration your trailers endures.
Dustin S from - 10/31/2014


Great company got to track my product as it was sent got to see the people’s names that processed the order and it all went smoothly for sure recommend this company to anyone in need.


im actually disappointed. the first one i put in filled up with water and burned up the first time i backed in the boat. i took off and seen it was cracked, had to have been manufacturing as i only live 2 miles from the ramp. and now the 2nd one has already went out. i guess i'll spend more money to replace the 2 flawed trailer lights. the original was 7 years old, now i've went through 2 of yours.


The amber lights are of poor quality. I have red, amber, and white lights on my boat trailer in various places (side, reverse, back/break lights). I replaced both amber lights because the went bad. The amber lights have both blow out...again. These are the only lights that have burned out on my 5 year old boat trailer.


Items were exactly as described and the Adapter and oval trailer light (amber). I accidentally ordered the wrong size Trailer wheel center caps (ordered 15" and I needed 14") the staff (Madison) was very helpful and friendly and walked me through the exchange process. Love doing business with etrailer.


Great service and timely shipping. Exactly what I needed.


I received the Oval Trailer Turn Signal and Parking Light-Amber- ST70AB in good condition. I haven't had time to install it on my trailer but I'm sure that it will work when I do have the time. Thanks for the fast shipping and the correct item.


The Lights were easy to install and work great and shipping was on time.


Could not find the amber light on line so had to for assistance
Associate was knowledgeable
Took the order
Parts arrived sooner than scheduled and were a direct fit
Good job

Lights are working great, no problems, I trailer my boat allot, backing in and out of water without disconnecting the light harness and have no problems, well satisfied
Rk - 07/29/2018

Thanks for the follow up Rk, we do recommend to disconnect the wiring harness before launching your boat at the ramp, but happy to hear this is working out for you.

-- Etrailer Expert Rachael H - 7/30/2018


Great! Ordered all lights for my 15 year old boat trailer. Quick shipping. etrailer had everything in stock as usual. Can depend on etrailer for all trailer parts.


Thanks for the fast service and great prices! Works great!


I bought these to replace the sealed units in my tow master tow dolly. they are 1/16" thinner than the originals but fit and work exactly as the originals once did. hooked up the same using existing connections also.


Dear George, I have been a customer of etrailer for many years
unable to find better prices or shipping costs.
the fact of being able to ask about product applications and help with any project being worked on.

this is called: Great Service!

Bill B.


Couldn't find this style light anywhere. Finally found it at etrailer. Great price, quick shipping.


I needed 5 different kinds of lights for my boat trailer since they had all burnt out. Etrailer had all of them in stock. They were shipped out the same day I made the call. Three days later they were delivered. Steve Z helped out a lot with my phone order. They get 5 stars from me!!


Everything I order from etrailer ships quickly and performs as it should. Great service! Roy


The product worked just as expected. I will be purchasing parts from etrailer in the future as my work step van needs. Thank y’all.


Received lights in good shape and quick shipping. Great
company to do business with! Will be my primary boat
trailer parts supplier from now on! Thanks!


Lori, the customer service representative , took the time necessary to ensure that I received the correct parts the first time around. My project was completed was out incident and in record time. I find Ms Lori to be patient, courteous, and a pleasure to deal with and deserving of a gold star by her name.


Great prices and products. I will retu rn.

The produce is working great. Thanks. I will be back.
Bob - 08/23/2018


The product was a perfect replacement for the broken lights at 1/3 the cost.Two red and two amber lights went on a Car dolly.


Good Service Light still working

Yes they work fine
David - 02/10/2018

Show More Reviews

Ask the Experts about this Optronics Trailer Lights

  • Recommended Replacement Optronics Amber Trailer Light For Wesbar 108121
    The Wesbar 108121 light has been discontinued but we do have a great replacement for you. Part # ST70AB measures 6-1/2 inches long x 2-1/4 inches wide x 2-3/8 inches deep. If you prefer an LED light you can use part # STL70AB.
    view full answer...
  • Wiring Trailer To Separate Turn Signal From Combined System
    You can add a converter to the trailer wiring to separate the brake and turn signals. You will also need to add an amber turn lights to your trailer. You can use the tail light converter, part # 118158. This will separate the turn signal circuit from the brake light circuit. This should be installed on the trailer in a way that keeps it protected from the elements. You will need to use the wires from your trailer wiring harness and attach them in the following manner. Attach the right...
    view full answer...
    Image 1 for
  • Locating Tail Lights to Replace Monarch 9059 Assemblies on Trailer
    I wasn't able to find too much information on the Monarch 9059 trailer light assemblies that you referenced, other than the fact that they do not appear to be available any longer. Because replacement lenses might be difficult to find, your best option may be to simply replace the light assemblies themselves with ones that feature matching dimensions. We have a nice selection of oval amber lights that look similar to the Monarch model that you have. I recommend taking a couple measurements...
    view full answer...
  • Is the Optronics Trailer Light # ST70AB Flush Mounted
    Yes, the Optronics Trailer Light # ST70AB that you referenced is flush mounted and would be an excellent choice for you. It does have a ground wire connection that you would want a Right Angle 3-Wire Pigtail # A47PB to use for installation. You would need to plug this into the back of the # ST70AB and then wire it by function to your trailer wiring. You might also be interested in purchasing a Rubber Grommet # a70gb to make installation easier.
    view full answer...
  • Replacement Clearance Lights To Replace Monarch 9059
    I have a clearance light replacement option for you, but the Monarch 9059 Clearance lights you have on yout 1975 Bethany Pop-up camper Compact 560 are not made any more, and replacement lenses for them have also been discontinued. I recommend replacing the clearance lights with the Optronics LED Trailer Clearance or Side Marker Light w/ Reflector - 6 Diodes - Rectangle - Red Lens # MCL44RB1 as they are the closest in size to your current lights as they measure 4" long x 1-1/2" wide x 15/16"...
    view full answer...
  • Recommended Converter To Split the Turn Signal From the Brake Signal
    I recommend the Vehicle to Vehicle Tail Light Converter, # 118158, for this application. This converter will split out the turn signals from the brake light wire and you can run the specified turn signal wire to new amber signals. You will have to find the appropriate amber lights for your specific customized vehicle. We have oval options like the Sealed, 6-1/2" Oval Trailer Turn Signal and Parking Light-Amber, # ST70AB. We also have rectangle options like the Bargman LED Upgrade Kit...
    view full answer...
  • Is The Peterson 421KRUS Offered In Amber?
    I do have another option that will match what you need, but Peterson does not offer an amber light to match the # 421KRUS, unfortunately. With that said, you will want the Optronics # ST70AB. This incandescent light is the exact same size as the Peterson (6-1/2" x 2-1/4"), but it does not include the gasket or wire. For that you will need the # A70GB and # A47PB.
    view full answer...
  • Recommendation of Turn Signal and Parking Light for Off-road use
    I recommend the amber trailer turn signal and parking light # ST70AB as it's sealed and waterproof. The rubber grommet # a70gb will provide shock mount protection extending the life of the lamp. The Optronics # MCL157AB could possibly be used as a turn signal but not recommended. The grommet you referred # A56GB would work as it will provide shock protection especially that you will be off-road. It will seat properly once the light is plugged into the grommet. The LED equivalent is amber...
    view full answer...

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Info for this part was:

Employee Jameson C
Expert Research:
Jameson C
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Brian T
Updated by:
Brian T

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