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Rectangular Ear Mount Trailer Clearance, Side Marker Light with Reflector - Amber

Rectangular Ear Mount Trailer Clearance, Side Marker Light with Reflector - Amber

Item # MC35AB
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3-7/8" L x 2-3/8" W x 1-1/16" D; Reflectorized lens; corrosion resistant; replaceable lens and bulb; surface mount on 3-5/16" centers; 1-wire; 1-bulb incandescent Lowest Prices for the best trailer lights from Optronics. Rectangular Ear Mount Trailer Clearance, Side Marker Light with Reflector - Amber part number MC35AB can be ordered online at or call 1-636-306-4830 for expert service.
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Optronics Trailer Lights - MC35AB

  • Clearance Lights
  • Rectangle
  • Incandescent Light
  • Amber
  • 4L x 2W Inch
  • Surface Mount
  • Rear Clearance
  • Side Marker
  • Non-Submersible Lights
  • Optronics

3-7/8" L x 2-3/8" W x 1-1/16" D; Reflectorized lens; corrosion resistant; replaceable lens and bulb; surface mount on 3-5/16" centers; 1-wire; 1-bulb incandescent

Rectangular Ear Mount Trailer Clearance and Side Marker Light with Reflector - Amber

This rectangular light can be used as a clearance or side marker light. The amber lens is reflectorized, meaning that a separate reflector is not needed for DOT compliance. This light measures 3-7/8" long x 2-3/8" wide x 1-1/16" deep, including the black plastic, ear-mount base. The molded plastic housing and durable lens provide all-weather protection against corrosion. The light features a replaceable, screw-down lens and easy-to-replace bulb. The light mounts on 3-5/16" centers. The light contains a single lead wire for power and is grounded through the mounting hardware.

  • Amber, rectangular light functions as clearance, side marker light
  • Reflectorized lens is DOT compliant, eliminating need for separate reflector
  • Weather and corrosion resistant
  • Single-wire design grounds through the mounting hardware
  • Surface mounts on 3-5/16" centers with ear-mount base
  • Dimensions: 3-7/8" L x 2-3/8" W x 1-1/16" D
  • Replaceable lens and bulb

Manufacturer Cross Reference
Light will work as an exact replacement for:
Wesbar # 3121
Grote # 46393
Peterson # 115A

Manufacturer Specifications

Rectangular clearance or side marker light with reflectorized lens, eliminating the need for a separate reflector to meet DOT requirements. Ear-mount black base, replaceable lens and easy to change replaceable bulb. Single-wire design grounds through mounting screw. Mounts on 3-5/16" centers. Features all-weather molded plastic housing and durable lens to protect against corrosion.

dimensions of light

MC35AB Amber Rectangular Reflector Marker, Clearance Light by Optronics, Inc.

Similar to Peterson 423600 - (115A)

Alternate part number: MC-35AB

California residents: click here

Video of Rectangular Ear Mount Trailer Clearance, Side Marker Light with Reflector - Amber

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

Video Transcript for Optronics Trailer Lights - Clearance Lights - MC35AB Review

Today we have Optronics Rectangular Ear Mount Trailer Clearance Side Marker Light, part number MC35AB. The lens on this light is reflectorized and is DOT compliant. Both the lens and the bulb are user replaceable. It is designed to surface mount to your trailer, using mounting holes that are 3-5/16 inches on center. One of the mounting holes will double as your electrical ground using a metal contact on the back. There is also a loose power wire lead that you will connect to your power supply. Next, we will hook up the light and show you how it works. We will connect our ground to the grounding mount and we will connect our power to our wire lead. Next, we will turn off the overhead lights, to show you how bright the light is. And that is Optronics Rectangular Ear Mount Trailer Clearance Marker Light, part number MC35AB.

Customer Reviews

Rectangular Ear Mount Trailer Clearance, Side Marker Light with Reflector - Amber - MC35AB

Average Customer Rating:  4.7 out of 5 stars   (47 Customer Reviews)

3-7/8" L x 2-3/8" W x 1-1/16" D; Reflectorized lens; corrosion resistant; replaceable lens and bulb; surface mount on 3-5/16" centers; 1-wire; 1-bulb incandescent


I was unable to find a replacement for my boat trailer side marker lights anywhere, however etrailer had this unit which matched up almost perfectly. I had broken one side light and decided to order 2 from etrailer and replaced both side marker lights with the new ones. I will say their products are priced right and the customer service is outstanding.

Still outstanding ! I have had the trailer in the water at several boat ramps and still working great ! I do unplug my lights before entering the water, but going home they always work. Great product.
Gary - 09/24/2019


Very good product, arrived on time and worked as planned


etrailer always delivers the right parts (often exact/easy replacements) plus great customer service! Fast shipping without damage another couple reasons I'll buy again from etrailer.


Lights work great on side of my boat trailer an was easy to hook up


Couldn't find an exact replacement for the clearance lights on my old Fleetwood , but I like these a lot better. Only snag is I can't solder a wire to the ground strip . I don't trust the skin as a cround conductor. But that's OK , I'll use terminals. These are SOLID nice looking , and Bright lights. I'm happy with them.


I ordered some LED tail lights and some incandescent side markers. They look great!
I had them shipped ordinary ground and they made it very quickly. I'm very happy with


Could not find this type of light on a shelf in a store anywhere. Found it right away on etrailer. Still going after a year of all types of weather.


Simple side marker light. Grounds itself to trailer with one of the mounting holes. Easy install and good light output.


Arrived quickly and with adequate packaging. Came with two mounting screws that didn't match originals, no big deal..still had originals. However, did not use the lights because the metal grommet for grounding made the mounting holes two close together for my project.


Came faster than I thought, part matched exactly what I needed


Replacement for older sidemarker. Hole centers were off by half a hole. Had to file out holes slightly for fit. Satisfied with product


Work great. These were added to my trailer where I only had reflector before.


nice light ... replaces the cheap one on my leonard trailer..which all the wire was dry rotted...


Excellent service and quality.


Great service


Item had to be an exact fit due to location of old lights. Worked perfectly!


Excellent service, FAST delivery! Couldn't be more satisfied with the seller or the light!


Holes didn't quite align with OEM light - but was able to make it work


Products as described, fast shipping.


Ordered on 2 different occasions and both times every step was clear and knew when to expect part. Awesome way to do business!


Product was a direct fit replacement. Arrived quickly and undamaged.


Product quality was good - although i ordered the wrong part


Exactly what I needed! Thanks folks!


Great selection-Easy order system-Resonable prices-Great communications-Fast shipping
Have used this company in the past and will likely use them in the future


The lights that I ordered worked perfectly and they were very easy to install. Thanks for the fast service.

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Expert Research:
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Updated by:
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