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4-3/4" x 4-1/2" Square. Incandescent trailer light kit provides all legal lighting and reflectors for trailers under 80". Includes combination tail lights and side markers. Stud mount with included hardware. 20' Harness. PC rated.
Features:
Specs:
Manufacturer Cross Reference
Light will work as an exact replacement for:
Wesbar # 7504
Optronics # TL27BK
A PC-rated light produces a 90-degree angle of light to either side of its centerline for a total of 180 degrees of coverage. This beam pattern can be clearly seen when you are standing directly in front of the light, as well as when you are standing on either side of the light. When properly installed, this type of light can function as both a front clearance light and a side marker light or as a rear clearance light and side marker light.
California residents: click here
There’s no ground for the taillights so now I’ve ordered a kit with both tailights with a ground for each light.
Great lighting kit for my vintage Holsclaw motorcycle trailer.
Richard
9/20/2025
This light kit made for a very easy installation and work great
etrailer is awesome. Great customer service, great products. You are a very knowledgeable group and we appreciate your support
Order arrived as promised. Happy with decision to use etrailer for my lights.
This is the 2nd Peterson light kit I've ordered. The nice thing is that it's all there for a complete rewiring of the trailer; marker lights, tail lights, wire, hardware, everything. So convenient.
First, I must say I've been very satisfied overall with etrailer and continue to be a return customer. The odering process is straightforward and etrailer kept me informed of the shipping status. I did have a minor problem with the light kit. After a quick phone call with etrailer, they were able to remedy the problem in a few minutes. I also find their installation videos and wiring diagrams to be very useful.
Everything needed to replace the broken and missing lights on my trailer.
Victoria H.
2/19/2025
That's great to hear, Joel! Please feel free to show us a photo and let us know what you think, once you have it all installed.
Works great for a replacement
I was to understand that the wiring sent would fit trailers up to 18 feet and my trailer is 16 feet and the wire sent wasn’t long enough.
The light kit arrived quickly and was very easy to install on my canoe trailer. Quality of everything is excellent and is working well! I also specifically chose this kit because it was Made in USA!
The kit wasn’t as complete as advertised. Had to purchase more wire locally.
It would have helped if an instruction sheet was included. Tested before install while hooked up to my truck. Needed to ground lights to get them to work and an instruction sheet would have eliminated much frustration. Wire connections on the lights also leaves room for improvement.
Sierra K.
6/20/2022
Yes, the white wire is for grounding. This kit does not have an instruction sheet but we do have this wiring help article explaining which colors do what:
Helpful Links
Good product. Did not include instructions, but found the wiring diagram on website. Also, would be nice if the 4 pin adapter had a cover, but I used one from another setup I had. I mainly used old wiring in trailer that I was replacing to pull the new wiring on, through the small wiring tunnels. Everything tested well and I was able to use the trailer the same night I finished install.
Replaced lights and wiring on 20 year old utility trailer. Easy install, good instructions. Trailer lives outside in all New England weather. Still working great after a year.
Quality looks good, price was awesome. will be installing on an 8'x15' trailer to make me road legal
Peterson products are good quality Hopefully the bulbs survived the shipping Everything was rattling loosely around with no bubble wrap or Styrofoam peanuts and all the fragile signs on the box were covered up by the various shipping labels. I prefer to support the the independent sellers like etrailer but next time I’ll go with Amazon
The only issue I have with this assembly is the quick connection at the taillights. It was nearly impossible to make the connection hold. Screw tabs would have been better.
Great wiring kit. Has everything you need to completely wire a new trailer.
Much better than the cheap made in China ones that I have tried before. This set is very good quality, and a robust wire harness, unlike some of the newer Chinese versions I have purchased. I would expect to get about 5-10 years out of this set.
All the items were quickly delivered and in great shape upon arrival. Only complaint is that there were no instructions for installation. That’s fine for people who know what they’re doing but I’m not that guy. A simple set of instructions would be helpful.
Everything good and all just wish they would pre stripped the wires
Always good products when shopping e-trailer. This light package was no different. Excellent service excellent product and excellent follow-up to make sure you're happy..
Sure would love if they would send me a hat and a 2X t-shirt to advertise for them lol. Seriously though buy it you won't regret it.
The exact replacement for my trailer lights with everything needed. Highly recommend.
Great service, ver responsive and solves problems
Shipping was quick and the lights worked out great! Very straight forward install.
Do you have a question about this Trailer Light?
Info for this part was:
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Mike L.
9/18/2025
The lamps included in the # M540 kit ground via their mounting studs when mounted to the trailer frame (or metal that's connected to the trailer frame) so a separate ground wire isn't necessary. If the lamp isn't mounted to the trailer frame or metal that's attached to the trailer frame, you can build a simple jumper with a length of wire and a ring terminal on either end. Place one ring terminal on the mounting stud so it's sandwiched between the lamp and the trailer, and secure the other end to the trailer frame.