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Aero Pro LED Trailer Light Kit for Trailers Over 80" Wide - Submersible - Driver and Passenger

Aero Pro LED Trailer Light Kit for Trailers Over 80" Wide - Submersible - Driver and Passenger

Item # TLL36RK
Our Price: $76.01
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Optronics Tail Lights - TLL36RK
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Waterproof trailer light kit includes 2 combination tail lights and 2 clearance or side marker lights to serve 8 functions on trailers wider than 80". Universal mount with stainless steel hardware. 25' Harness with 4-pole connection. Great Prices for the best trailer lights from Optronics. Aero Pro LED Trailer Light Kit for Trailers Over 80" Wide - Submersible - Driver and Passenger part number TLL36RK can be ordered online at or call 1-636-306-4830 for expert service.
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Optronics Trailer Lights - TLL36RK

  • Tail Lights
  • Rectangle
  • Kit
  • LED Light
  • Red and Amber
  • 8L x 3W Inch
  • Surface Mount
  • Stop/Turn/Tail
  • Side Marker
  • Rear Clearance
  • Side Reflector
  • Rear Reflector
  • License Plate
  • Submersible Lights
  • Optronics

Waterproof trailer light kit includes 2 combination tail lights and 2 clearance or side marker lights to serve 8 functions on trailers wider than 80". Universal mount with stainless steel hardware. 25' Harness with 4-pole connection.


  • Combination trailer light kit serves 8 functions when properly mounted on trailers over 80" wide
    • Stop, turn, tail, side marker, rear clearance, side reflector, rear reflector, and license plate light
    • Great for marine trailer applications
  • 2 Aero Pro Combination LED tail lights (STL36RB and STL37RB)
    • Driver's-side light includes license illuminator
  • 2 Sidemarker and clearance lights (MCL91AK)
    • Single wire design grounds through mounting hardware
    • Plastic base with chrome finish
    • Gaskets for weathertight seal
  • Sealed, waterproof construction is submersible
  • LEDs makegreat replacement for incandescent lights
    • Last 50 times longer
    • More efficient - provide better light with less power output
    • No bulbs to replace - no brittle filaments
  • Durable polycarbonate housing and acrylic lens
  • Corrosion-resistant license plate bracket
  • Universal mount
    • Stainless steel mounting hardware
  • 25' Wiring harness with 4-pole connector
  • P2 rated clearance/marker lights
  • DOT approved


  • Application: trailers over 80" wide
  • Dimensions of combination tail lights (STL36RB and STL37RB): 7-7/8" long x 3-1/4" wide x 2-7/8" deep
  • Dimensions of clearance and side marker lights (MCL91AK): 2-1/2" long x 1-1/4" wide x 7/8" deep
    • Dimensions with bracket: 2-7/8" long x 1-1/2" wide x 1-1/4" deep
  • Diodes:
    • Driver side tail light: 23
    • Passenger side tail light: 17
    • Side marker and clearance light: 3 per light
  • Lifetime warranty on LEDs

Optronics TLL36RK Aero Pro LED Trailer Light Kit for Trailers Over 80 Inch Wide Diagram

Note: Over 80" Federal Regulations require additional clearance lights (like MCL93RB or MCL84RB - sold separately). Also, if using with a tilting trailer you may need to route a separate ground wire from the clearance lights to a metal part of the trailer frame since tilting trailers sometimes use rubber isolators in the tilting mechanism.

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 circuit board is sealed, which means that water will not damage the diodes or circuit board.

Combination Lights for Trailers Over 80" Wide

Flatbed trailer over 80" wide with combination tail lights

If a trailer is 80" or wider at its widest point, then it requires rear clearance lights in addition to basic trailer lights. These clearance lights indicate the width of the trailer when it is viewed from the back.

To meet these requirements on a flatbed utility trailer where the bed extends past the wheels, you can install combination trailer lights that include the rear clearance function. For proper mounting, the lights must be installed at the widest points on the rear of the trailer - one on each corner.

P2-Rated Lights

Diagram of light spread for P2 rated light

A P2-rated light produces a 45-degree angle of light to either side of its centerline for a total of 90 degrees of coverage. This beam pattern can be seen straight on, but it cannot be seen clearly from the side. So this type of light can be used as either a side marker light or a clearance light, but it cannot function as both. If you need both functions, then you must install 2 separate lights on your trailer - one as a front or rear clearance light and one as a side marker light.

TLL36RK Optronics Aero Pro LED Combination Tail Light Kit for Marine Trailers over 80" Wide - Submersible - Red Lens - Driver and Passenger Side - 25 Ft Harness

Alternate part number: TLL-36RK

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Aero Pro LED Trailer Light Kit for Trailers Over 80" Wide - Submersible - Driver and Passenger - TLL36RK

Average Customer Rating:  4.7 out of 5 stars   (270 Customer Reviews)

Waterproof trailer light kit includes 2 combination tail lights and 2 clearance or side marker lights to serve 8 functions on trailers wider than 80". Universal mount with stainless steel hardware. 25' Harness with 4-pole connection.


I purchased these lights to replace and upgrade the incandescent set that came on a 20’ boat trailer. I chose this set because I liked the way the taillight side markers protrude out rather than being flat. I felt that this would help with visibility at night. The only thing I’m not particularly fond of is the way the amber marker lights that came with the set are designed. The light itself I like. It uses a plug in wire design rather than a sealed wire that is already attached like the taillights. It’s more or less a matter of preference. I mounted these on the fenders facing forward to help see where the trailer is in dark and rainy weather.

I’m still happy with the product and would recommend it to future buyers.
Charlie - 07/03/2019


Quality Product, Easy Mount, Larger than normal, but they are replacing my Vehicle's Brake & Running lights. When the Bikes are mounted on the rack, they cover the Vehicle's lights. The first photo without the Bike was taken after the lights were mounted.The second photo with the Bike on the rack was photoshoped, as part of the planning process to mount the lights.

Lights are working great, excellent product
Albert - 05/09/2020


After installing a wiring harness on my Honda Fit (which was fairly tricky!) I enlisted the help of my father and uncle to help me install this on a small ancient boat trailer for a newly built sailing dinghy. Installation was a breeze but we did have a hell of a time creating a good grounding contact with the trailer. On a newer trailer, this likely would have been easier. I would also recommend just wiring a full ground from the wiring harness at the car end and not messing with a metal-on-metal contact. I trailer and launch my boat in salt and fresh water and maintaining that ground connection throughout a season of regular use has proved challenging! The lights never come on at first but then bounce on after I go over a few bumps and stay on. The lighting kit has been great and I've had no problems whatsoever, just the standard issues of keeping the rust off the ground contacts and keeping the wiring in good shape as it's mounted on the outside of (round!) trailer supports. etc. The lights are bright and look nice and haven't filled with water or had any problems. You may need to invest in some larger/sturdier zip ties if you end up needing to run this on the outside of your trailer versus threading it through the frame.


Works well and overall nice kit, I just can't wrap my brain around the fact some of the wiring stays exposed on a trailer light kit designed as submersible. Just a matter of short time before it corrodes especially if submersed in saltwater/brackish water.

You can cap off any unused wires. Also, using heat shrink butt connectors like item # DW05745-10
Deka Heat Shrink Butt Connector - 12-10 Gauge - Nylon Insulation - Yellow - Qty 10
, is a good way to keep water out of your connections.
-- Etrailer Expert Sierra K - 07/12/2022


Looking to be noticed at night? Well these are the lights! I mounted these to a PWC trailer, boy did it make a difference! Everything is provided with this kit if you are starting from scratch, or just replacing existing similar lights. Very pleased with how bright these lights are.


This has been a great upgrade to my boat trailer. After I upgraded my truck lights to LEDs I needed a good set of compatible lights for my trailer. These were it! Very easy to install, came with new, complete, color coded wiring harness. Got it done in about an hour.
Thanks! Great product!


Good product. The amber side lights are a little flimsy but it all works for what I need.


Order was processed and shipped quickly. Arrived as scheduled. Installed easily and functioned as expected. Installation instructions were poor, but I'm an electrician so that was no issue. I recommend this product and etrailer as a supplier.


Excellent lights very visible on my trailer.
I would buy them again.


Looks like a quality product. Quick shipping,great communication. Always a goog experience with etrailer


I recently decided to replace my existing lights with LED's on an enclosed 5 x10 ATV/Motorcycle trailer. This kit worked great for the job. Install was simple for the most part, but may require some small modifications based on existing wire and lighting locations. Lights are very bright and make trailering a breeze. The only reason I gave it 4 stars was that it was short several pieces of the install hardware and I chose to improvise rather than contact Etrailer customer service and wait for replacements. Certainly recommend and will be a returning customer.


Nice lights, they work well on my flatbed trailer


These fit my 1998 Ranger r91 sport boat trailer perfectly and a re a great upgrade. The screws needed to be pushed all the way to the very top of the channels and the lights look like they are a factory fit.
Easy to install and a great product!


There seems to be some confusion (myself included) about the spacing of the mounting channels on the rear of the tail lights.

So gather round and learn from my mistakes:

ALL of the spacing between channels is 2". The difference is the distances from the channel to the side of the lamp assembly!

Note the attached picture. The bottom lamp is for an over 80" trailer and the top is the one I mistakenly purchased. NOTE THE DIFFERENCES FROM THE SCREWS TO THE EDGES OF THE LAMP. BIG DIFFERENCE! Also note that the over 80 lamp (bottom) is shaped differently on the right side, while the top under 80 lamp has straight sides.

Happy trailering!



Great quality. Bought these for my duck boat trailer. Lights and wiring were shot. Just an FYI, at least with the wiring harness I bought there was no ground wire. All of these led lights needed to be grounded to the trailer. Not a huge deal, just different from other trailers I have rewired.


After a year the LED trailer light is as bright as the day that I installed it.
Good service and good price. I would use this product again!


The instruction sheet on how to install is weak. A few diagrams or pictures would be worth a thousand words.


The stop/turn rear lights seem to be great quality and sealed well. The marker lamps itself is a sealed unit, but separate from its chrome mounting plate, so I guess thats OK. I'll be using some black silicone to install the lights; after I pilot drill the screw holes I'll put a healthy amount of silicone on the back of the unit. This will get a little goo in the threads to help seal them and fill any voids between the housing and trailer frame it sits against to prevent a little pool of water from being stuck in there. The stainless hardware to mount the main lights is good, but the rest of the stews suck. I'm going to pick up some better stainless screws that are longer, my trailer frame is thick. The plastic wire connectors are crap, throw them out (the little blue ones that pierce the wire for the marker lights). How is that water proof? Get some heat shrink butt connectors and adhesive lined heat shrink tube is this is for a boat trailer installation like mine.


Great kit! Adapted to an older PWC trailer no problem. Very bright, and sharp! Kit includes everything needed for a install from scratch.


Product arrived as ordered and on time.

Once installed, everything works and looks great.

1) Installation istructions included with the kit were a bit limited at times, especially if you had never done this sort of thing before (like me). For example the instructions to install the base-snap-on post-style amber marker lights were OK but not explicit in terms of pointing out that it's important to orient the light the right way before snapping it in place. Again, a reasonably bright person can figure it out, but a bit more guidance would have been helpful.
2) Kit does not include the three rear clearance LEDs to replace the ones on my trailer. It is clear that these are not in the kit and I'm not dinging for this. Just know that if you want to replace these, you are on your own to find them. For me it was a bit of a challenge since I wanted LED versions that fit where the old ones went without drilling new holes. I needed ones with mounting 'ears' with holes 2 3/4 inches on center. I found what I needed at a local retailer. To the credit of, this website is great in that specs like mounting hole spacing is usually right there for you. In searching online for the clearance lights I wanted many sites don't put that sort of info up for you. Bravo to etrailers!

Don't let the 'cons' I listed dissuade you. This seems to be a good product (I haven't put the trailer in the water yet...), installation was pretty easy, and has good online info to help in most cases.

These trailer lights are awesome! They work and look great and seem to be well sealed. After many trips to the lake they still look brand new with no sign of water entry. LED is the way to go.
Steve W - 06/04/2014


Well made product overall. I would have a few suggestions for the manufacture though. First the screws that came with it were not self tappers as described in the instructions. Luckily this was replacing old busted lights and no new holes needed to be drilled. Second the connections for the main wires to the wires on lights them selves should not be done with wire nuts. Luckily I had some heat shrink connectors . I launch my boat primarily is salt and brackish water and know hot gas saltwater can eat through most metals. Plus no submersible trailer should have connections with wire nuts. Third both sides should have clear back up lights on bottom of lights not just driver side I don't know about most people but I do use both mirrors backing up and most every one of my back downs take place well before daylight since this was for my duck hunting boat.

Well, that light is for the license plate, NOT for back up lighting. Thought Id clarify that.
-- comment by: Ashley J - 11/09/2015


These lights worked perfectly and are quite bright. I had spent days trying to figure out why my turn signals would not work with my previous incandescent lights(on a new utility trailer. I even tried three different new incandescent trailer light sets and two new converters) when a tech at suggested I try an LED trailer light set. This set worked as soon as I hooked them up. Wish I had been smart enough to buy these LEDs in the first place. Would have saved me a great amount of frustration and expense. My guess is that my car's electrical system and/or the converter could not handle the extra current of the incandescent light sets.

Probably needed a heavy duty flasher to get the turn signals to work on the incandescent lighting or a trailer wiring kit for your application of vehicle. Installed a harness kit on a 2013 Chrysler Town and Country van that had a circuit built into the wiring kit.
-- comment by: Clarence - 08/14/2014


These lights work very well. They are bright and easy to install. I would purchase them again.


Tremendous product at a great price. This lights arrived before promised, well packaged, with all parts and undamaged. Installation was relatively easy; I routed the wire through the boat trailer frame instead of on the frame as described in the instructions. There was enough wire included for my 17.5' boat trailer. The lights are bright, well sealed and sturdy. They were dunked many times during last summer fishing season I had no problems. Highly recommend. I will be putting the same set on a utility trailer.

Still working perfectly. The lenses show no oxidation, wiring and connectors all holding up well. Still very happy with my purchase.
Craig S - 04/04/2018


Fantastic product! RANGER BOAT did not have a viable LED retrofit for my particular year trailer, nor did they have a suggestion. I measured my boat , and ordered these. I had to drill new holes, but was VERY easy to install these, and they look GREAT! No more burning out bulbs for this guy. I am a electrician, so the re-splicing of the wires wasn't an issue at all. I think that even if I was not, the directions are very easy to follow. I would recommend that you get some "HEAT SHRINK TUBE " to put over your connections.

Still working perfectly.
John D - 03/23/2018

Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Troubleshooting Installation of Optronics Trailer Tail Light Kit TLL36RK
    The first thing you can check on your trailer tail light installation with Optronics kit # TLL36RK is the ground wire, which is the white wire. A bad ground will prevent operation of all lights. This white wire from the 4-pole flat connector must be firmly attached to a clean bare metal surface on the trailer frame. You can try sanding off any paint or rust to get down to the bare metal. Make sure the white ground wire is very firmly secured to the trailer frame. You also need to ensure...
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  • Replacement LED Boat Trailer Light Kit
    The side marker lights are LED and the Over 80 inch description is for DOT regulations. Trailers over 80 inches wide are required to have two side marker lights, one each side.
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  • What are the Dimensions of the Lights Included with LED Trailer Light Kit TLL36RK
    Trailer light kit # TLL36RK includes right hand tail light # STL36RB and left hand tail light # STL37RB. These lights measure 7-7/8 inches long by 3-1/4 inches wide and 2-7/8 inches deep. The clearance marker lights # MC91AS included with the kit measure 2-1/2 inches long by 1-3/16 wide and 7/8 of an inch deep.
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  • How Do the Lights in Trailer Light Kit, # TLL36RK Mount to the Trailer
    The Waterproof, Over 80 Inch Aero Pro LED Trailer Light Kit w 25 Foot Wiring Harness, # TLL36RK, comes with the necessary hardware to mount the lights to the trailer. The taillights do mount to the trailer using two bolts, two washers, and two nuts each. The smaller clearance lights mount to the trailer using two screws each. You can take a look at all of the hardware included in the kit by clicking on the last picture on the product page. Roll your mouse over the picture to zoom in.
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  • Troubleshooting Running Lights on Boat Trailer Which Blow Fuses
    There are two likely reasons why you are blowing fuses when the running lights are on. It could be a short on the wiring circuit, or, if you have incandescent running lights on your boat trailer it is possible you are drawing too much power. You will need to find out the max amp rating for your harness and determine if you are drawing more than what you can handle. If that is the case, I highly recommend switching to LED lights such as the Submersible Trailer Lights # TLL36RK, which are...
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  • Side Marker Lights Are Causing a Short on the Trailer
    The side markers that are included with the LED Wiring Kit, # TLL36RK, install exactly as you have described. The issue definitely sounds like a short, as you mentioned, if you are blowing a fuse. The short could be cause by the connector from the short black power wire for the clearance light touching the trailer frame. I made a short video explaining what I am talking about. The solution for this would be to drill a hole in the frame large enough so the connector does not touch the frame....
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  • What Hole Size Required for Self-Grounding Chrome Base on Optronics Trailer Light Kit # TLL36RK
    The amber clearance lights included in Optronics Trailer Lighting Kit # TLL36RK incorporate a metal tab to make one of the electrical contacts. That tab is intended to make contact with the supplied stainless-steel mounting hardware. Since the light base is non-metallic (it is chrome-finished plastic) that metal tab provides the contact point. I pulled a sample of the light kit to measure the mounting hole diameter for the amber lights. The hole diameter for these clearance lights is 0.2...
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  • Amber Marker Lights Not Working in Optronics Aero Pro LED Trailer Light Kit # TLL36RK
    The red tail lights included in the Optronics Aero Pro LED Trailer Light Kit # TLL36RK include a separate white ground wire with ring terminal to make their ground connection. However, the amber side marker lights use one of their mounting screws to establish the ground connection to your trailer. This kit includes stainless-steel mounting hardware designed to help make a good electrical connection. Please refer to the linked photo which shows the rear of the amber side marker light assembly....
    view full answer...
    Image 1 for
  • Some of the Diodes Not Lighting Up on Newly Installed LED Trailer Tail Lights
    There is either an internal problem with the LEDs themselves or there is a bad ground so that the circuit is not 100 percent completed causing only some of the diodes to light up. Many boat trailers use aluminum frames which do not offer the best ground. I recommend extending the ground up to the main trailer connector ground or to a steel component such as the axle. If this does not solve the issue then there is likely a problem with the LEDs themselves and the tail lights will need to...
    view full answer...
  • If Optronics Trailer Light Kit TLL9RK is Waterproof Why Have Large Holes that Allow Water In
    The assemblies are designed to allow water to enter into them but the light fixtures in the assemblies are sealed so the water will not cause any problems. Basically the holes are there to ensure the water will easily drain out once the trailer drives up the boat ramp.
    view full answer...
  • Are Marker Lights on the Aero Pro LED Trailer Light Kit Submersible
    I verified with Optronics and the two amber marker lights, included with # TLL36RK are submersible.
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  • Troubleshooting Trailer Lights that Turn off After 5 Minutes of Use
    It sounds like you are on the right track. Most likely what's happening is that your trailer's lights are a drawing a bit too much amperage which eventually causes the lights to just shut off. Eventually either a fuse or relay is going to pop or if you have a converter box installed for trailer wiring it will short out and need to be replaced. What you will want to do is replace as many of the lights with LED lights because they draw a fraction of the power of incandescent bulbs. I attached...
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  • Availability of LED trailer Light Kit for 2000 Shorelandr Trailer
    You can see all of our submersible LED type lighting products on the linked page. You can also refer to the linked article on trailer lighting requirements to see exactly what lighting is needed for your particular trailer. For taillights, click on that category at the top of the page; then select the shape, mounting type and dimensions most closely matching your requirements. We even offer complete LED lighting kits for trailers over 8-inches wide, part # TLL36RK from Optronics.
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  • Recommended LED Replacement Lights For 1996 Shorelandr Trailer
    From what I can find online, I recommend the Optronics Submersible, Over 80" Aero Pro LED Trailer Light Kit w 25' Wiring Harness # TLL36RK for your replacement lights. These LED replacements are tested to last 50 times longer than incandescent lights with better light coming from less power. These lights come with stainless steel mounting hardware and the wiring harness.
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  • Distance Between Mounting Slots on the Optronics Trailer Light Kit # TLL36RK
    I went out into our warehouse and pulled an Optronics Trailer Light # TLL36RK to measure the mounting slots and found that they are 2 inches on center. Check out the picture I attached to see the measurements. The amber side marker lights are also LED bulbs.
    view full answer...
    Image 1 for
  • What Are Dimensions of Mounting Slots on Optronics Trailer Light # TLL36RK
    The lights will mount using screws that will slide into the slots on the black base of the lights. The distance between the mounting slots on the Optronics Trailer Light # TLL36RK, measure 2 inches on center. Checkout the picture that I have included showing these dimensions.
    view full answer...
    Image 1 for
  • Is Water Supposed to be Able to Get in and Drain Out of the LED Trailer Light Kit, # TLL36RK
    A submersible trailer light will have holes in it to allow water to come in and drain back out again. There is another type of light, a sealed unit, that is not supposed to let water in it. The amber lights in kit # TLL36RK, are sealed lights, but the tail lights are not sealed units. It does sound like they are working as they are supposed to. Just make sure that your wiring connections are waterproof!
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  • Adding 2 Wire LED Clearance Lights to a Boat Trailer
    First, if you are switching to LED lights on the trailer, make sure to replace all of the incandescents with LEDs. Mixing the two styles can result in some of the lights not working and/or malfunctions. Clearance lights, LED or otherwise, that have 2 wires use one wire for power and the other is the ground that attaches to the trailer frame. Clearance lights run off of the running light circuit, the brown wire if you are looking at trailer light kit # TLL36RK. The wires from the old lights...
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  • Estimating Trailer Axle Weight Capacity Based on Dimensions
    A 1-3/4-inch square trailer axle typically carries a weight rating in the area of 2000-lbs. Often axles will have a sticker or plate to indicate their weight rating. It also sounds like your axles have brake flanges already welded in place at their spindles. Please note that 12 x 2-inch trailer brakes, which fit 12-inch drums, are typically used for axle capacities from 5200- to 7000-lbs. Be sure you are measuring your drums at their interior, as shown in the linked photo. 2000-lb axles...
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    Image 1 for
  • How to Mount Submersible, Over 80" Aero Pro LED Trailer Light Kit w 25' Wiring Harness TLL36RK
    The lights included with Submersible, Over 80" Aero Pro LED Trailer Light Kit w 25' Wiring Harness Item # TLL36RK hang on bolt heads. There are slots in the backs of the lights that are the proper width for the heads on the included bolts. The bolts will have to be installed into the surface far enough so that the lights, when hung, will be flush with the mounting surface.
    view full answer...
  • All Lights on Trailer Working Except Rear Running Lights
    It is possible that the short blew the tail lights on the trailer. If they were incandescent lights and you have access to the bulbs could see if the bulbs are burned out. But on LED lights the circuitry could be fried and it is harder to test that. but you could apply 12 volt power directly at the lights' running light wires and if they do not light up it could mean the circuits are burned out. It could also be a ground problem. Ground problems normally show up when there is more draw...
    view full answer...
  • What Are The Dimensions Of The Amber Side Marker Lights In The Aero Pro LED Trailer Light Kit?
    The dimensions of the amber side marker lights is 2-1/2 long x 1-1/4 wide x 7/8 inches deep in the Optronics Submersible, Over 80" Aero Pro LED Trailer Light Kit w 25' Wiring Harness # TLL36RK. I've attached a review video of this kit for you.
    view full answer...
  • LED Trailer Tail Lights Do Not Work When Vehicle Headlights Are Turned On
    The problem you are having with your trailer lighting - stop and turn signals stop working when the vehicle headlights are turned on - is most often related to an issue with the ground. Trailer running lights, which are on continuously whenever the vehicle headlights are on, will draw more current than brake lights and turn signals which come on only when those functions are activated. If the ground connection (either the main trailer connector's ground or the grounds at the light fixtures...
    view full answer...
  • Troubleshooting Dim Trailer Lights and Blinkers Heard Through Stereo Speakers
    Sounds like a weak ground. You could try changing your ground point for the stereo and the taillight converter, if that doesn't work to stop the noise through your speakers you will need to find a filter or noise suppresor from an electronics store like Radio Shack. Finding a better ground should fix the problem though. This will also help with the wrong blinker lightly illuminating and the lights not being very bright.
    view full answer...

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