bing tracking image
  1. Trailer Lights
  2. Optronics
  3. Tail Lights
  4. Square
  5. Kit
  6. Incandescent Light
Standard Trailer Light Kit with 25' Wire Harness

Standard Trailer Light Kit with 25' Wire Harness

Item # TL29BK
Retail:$34.23
Our Price: $30.41
You Save: 11%
Trailer Lights
Shipping Weight: 2 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

In Use/Installed

Customer Photos

Need help with installation?
Locate installers near me
Trailer kit with 2 stud mount tail lights; 2 stud mount amber clearance lights; license plate bracket; wire harness w/4-pole connector Great Prices for the best trailer lights from Optronics. Standard Trailer Light Kit with 25' Wire Harness part number TL29BK can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (422)
  • Q & A (0)
  • Photos

Optronics Trailer Lights - TL29BK

  • Tail Lights
  • Square
  • Kit
  • Incandescent Light
  • Red and Amber
  • 5L x 4-1/2W Inch
  • Surface Mount
  • License Plate
  • Rear Reflector
  • Side Marker
  • Side Reflector
  • Stop/Turn/Tail
  • Non-Submersible Lights
  • Optronics

Trailer kit with 2 stud mount tail lights; 2 stud mount amber clearance lights; license plate bracket; wire harness w/4-pole connector


Standard Trailer Light Kit with 25' Wire Harness

This is a stud-mounted trailer light kit. The kit contains two stud-mount tail lights, two stud-mount, amber clearance marker lights, a corrosion-proof license plate bracket, and a 25' wire harness with a 4-pole trailer connector. Tail lights are parts ST8RB and ST9RB. The amber marker lights are part MC36AB. The license bracket is part LP10SB.

  • Trailer light kit containing stud-mounted lights, license bracket and wiring harness
    • Two red, stud-mount tail lights (ST8RB and ST9RB)
    • Two amber, stud-mount marker lights (MC36AB)
    • A corrosion-proof license plate bracket is included
    • A 25' wiring harness with 4-pole connector

Manufacturer Cross Reference

Light will work as an exact replacement for:

Peterson # M545


NOTE: Please check amperage rating on wiring harness, if rated for 2.1amps or less for stop/turn circuits then lighting kit will overload the harness.


Manufacturer Specifications

Kit includes two universal stud-mount tail lights, a corrosion-proof license plate bracket and two amber stud-mount marker clearance lights. Contents: (1) ST-8RB, (1) ST-9RB, (1) LP-10SB and (2) MC-36AB. Kit is equipped with a 25' wire harness.



LP29BK Trailer Light Kit, 25' Wire Harness by Optronics, Inc.

Alternate part number: LP-29BK




California residents: click here


Customer Satisfaction Score:


Customer Reviews

Standard Trailer Light Kit with 25' Wire Harness - TL29BK

Average Customer Rating:  4.7 out of 5 stars   (422 Customer Reviews)

Trailer kit with 2 stud mount tail lights; 2 stud mount amber clearance lights; license plate bracket; wire harness w/4-pole connector

by:

Parts are missing... there is no way to connect the trailer lights to wire harness. The adapter is missing. Lights are useless to me this way.

Etrailer Expert

Brooke M.

6/9/2023

Wow, that really bites! So sorry to hear that. I will have our customer service team reach out to you about this.



by:

Product works as advertised except for wire clips. They keep falling off.



by:

Again you Guys have made life easy with your video and helpful tips!
Like your shipping packages as well. Compact with little waste of materials.
I used this product as a light system for my motorcycle carrier when I haul my TW200. With the bike on the carrier the vehicle taillights are blocked.
The TL29K light kit was what I used to solve this problem.



by:

I am very pleased with this product. Bought this kit to replace lights on a boat trailer from the 1980's.Install and wiring was easy to do with no problems. Lights worked great. Recommend this product.



by:

Thanks Much, just got in from installing everything I ordered and it
all went on nicely. I rebuilt a 6' X 12' 1999 utility trailer
with treated lumber etc..........plus your parts, looks great. Thanks
again, going to do the same for another utility trailer I have, a
6' X 10, so, I'll be ordering from you later in the summer. Thanks
again



by:

It will fill my need in fixing lights in small boat trailer



by:

The light kit was shipped promptly and nicely packaged. Everything looks to be made of very good components. I will be insalling this kit on a mobility scooter carrier and 90% of what I need was included in this kit.



by:

First off--Dealing with etrailer.com was a pleasure. The trailer light kit was just what we needed. Unfortunately our older trailer would not provide as good a ground as that required. The forward clearance lights worked fine but we had to individually ground the rear lights directly to the trailer frame next to the light mounts. Also, one of the rear lights, the one without the license plate light, had debris inside that precluded it lighting appropriately. After completely disassembling it we found wire shavings/cuttings that impeded a solid contact. Fortunately the co-owner of the trailer is an electrician and he had all the solutions. Alone I would have had to hire someone.

Tomv

11/4/2016

Lights continue to function appropriately after a year of exposure to Montana weather.



by:

Wife’s Project…NO WIRING DIAGRAM / PRINT.
SHE DIAGRAM TO MATCH SHOULD BE STANDARD!!

Etrailer Expert

Katrina B.

6/5/2023

Unfortunately, Optronics doesnt offer instructions for the # TL29BK trailer taillight kit. However, if you click the link I provided to the trailer wiring help article, youll see a wiring diagram showing how the kit would be used to wire a trailer.



by:

The trailer kit I ordered arrived in a timely fashion and the items included are solid nice looking pieces.

I reviewed the video on installation and found the wiring and installation of the lights to be extremely simple. I rewired my entire trailer, replaced the tail lights and added the running lights (did not have these before I ordered the kit) in about two hours. Could have done it faster but I was in no rush.

I would definately recommend the company and products to anyone in need of replacing wiring and/or lights.

Charles P.

1/24/2016

Product is still in place, still working beautifully. Did have to replace on of the tail lights but that was due to an issue with the tilt in the trailer and the light getting smashed on a rock -



by:

The connection (wire to taillight) for this trailer light kit is extremely flimsy and clearly not intended for external mounting. I ended up reordering submersible tail lights to get a more rugged connection. The wiring harness is fine and the tail lights work but the connection is flimsy.

It's very inexpensive but a few dollars more for a more rugged set of lights is probably a better buy.



by:

worked as expected price was good



by:

Can't beat the prices and product selection. I was able to get bearings, races and seals to do two hubs for what I would have paid to do one locally. Although the bearing kits were made in China, they appeared to be a better quality bearing than the China bearings I removed from the hubs. No issues with packaging or shipping. Not only can one find parts here but, lots of good info and support as well.

Trent

10/23/2017

The trailer I installed the parts on belongs to my 93 yr old neighbor. Needless to say, it is used very little. He and his son were planning on using it and wanted me to check it out before doing so. Thats when I discovered the need for new bearings and seals. He also wanted it road worthy for any of the neighbors that might need to borrow it. However, what time it has been used, it has done exceptionally well. Very smooth and quiet and although I had a bit of difficulty getting the pigtail to plug into the connection on the truck, all lights are working for the first time in many years. Thank you for checking in on us. Have a blessed day.



by:

The product was fine, etrailer however packed heavy items with this causing one light to be smashed. Fortunately, not a part I absolutely needed so not worth the effort to RMA this.

Etrailer Expert

Brooke M.

10/4/2022

Thank you for reaching out about this. I have sent your information to our customer service team already and they will be getting in touch with you.



by:

Great product, fast shipping.



by:

Good looking lights. Installed easily.



by:

I haven't installed the lights yet as I'm waiting to get the trailer sandblasted and painted. But, it's exactly what I needed and I'm sure they're gonna work out just fine. eTrailer has a great lighting selection to choose from including LED's.

Trent

10/23/2017

The trailer I installed the parts on belongs to my 93 yr old neighbor. Needless to say, it is used very little. He and his son were planning on using it and wanted me to check it out before doing so. Thats when I discovered the need for new bearings and seals. He also wanted it road worthy for any of the neighbors that might need to borrow it. However, what time it has been used, it has done exceptionally well. Very smooth and quiet and although I had a bit of difficulty getting the pigtail to plug into the connection on the truck, all lights are working for the first time in many years. Thank you for checking in on us. Have a blessed day.



by:

Quite pleased with etrailer ball hitch accessories which I am using on a spindle wheel motorcycle carrier behind a fifth-wheel trailer.....

Byron

8/7/2018

They are all serving their intended function just fine. Thanks



by:

Looks nice, but no instructions whatsoever. The lights have copper holes in them, that are partially labeled, but some of the labels don't make any sense. And how can you stuff a twisted wire into a hole, it just doesn't work. How many engineers does is take to screw up a simple trailer light set? A pain in the butt, I wish I have never bought them. Will not by these sorts of things on line again, will go to local farm stores.

Etrailer Expert

Mike L.

8/18/2018

Each lamp will have two holes that are used for connection points. On the drivers side, one hole is for the brown wire, which is the running lamps. The other is for the left turn/brake lamp, which is the yellow wire. On the passenger side, one hole is for the brown running lamp wire, the other for the green right turn/brake lamp wire. To the wires, use a small flat blade screwdriver and push it in the small hole under the larger hole where the wire s. Push the stripped wire in until it stops, then remove the screwdriver. This locks the wire into place.



by:

Trailer hitch and instructions were top notch as was the wiring kit. Would do business again if the need arises.

Chris D.

4/19/2018

I still like them just fine. Never an issue with either the hitch or the lights. Thanks



by:

I bought springs, mounts and Tailight kit to fix up a rusty utility trailer. I cut, weld scraped and painted for the better part of a month in spare time. The springs and mounting instructions on e trailer are excellent. Only issue/shortcoming are the tail lights. Wire just pushes in and spring loaded strip holds them. I soldered and sealed the connection with silicone. So far that salt covered roads haven't hurt it in winter. The folks at etrailer are very helpful and prices are a good value.



by:

Easy to install, great price



by:

Whenever I need something for one of my trailers, etrailer is where I go. The website is easy to navigate, they always have what I need and the prices are hard to beat. Customer service is top notch too!



by:

Nice package-everything is there. One thing is make SURE when mounting the 4 lights that the nuts/washers are grounded to bare metal on your trailer. I just finished refurbing my trailer and had 4 coats of fresh paint-lights didn't work. Had to take my dremmel and grind the paint off down to bare metal around all the mounting holes. All is well now! Also, always had good luck with etrailer, but when i didn't get my order in about 2 weeks i had to call-i ordered the submersible lights and found out they were on back order for 2 months! yikes-glad i called as i switched up my order (got the non submersible lights and will just unplug when dipping in) but it would have been nice to know that upon ordering-so if you don't get your order quick, call em!!



by:

I want to thank the folks at e trailer for the good service. All the parts I ordered are of good quality, they all worked good and I will be using e trailer from now on! I also think that the email they sent with the instructions for each item was a great idea.

Jr

9/19/2018

all is well and working fine. Your store is the best! could use LESS e-mails Thanks


25
422
Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • Troubleshooting New Wiring On Landscape Trailer Working Until Taillights Were Wired In
    Since the running lights worked until you installed the tail lights on your trailer, it sounds like a bad/weak ground. How exactly did you ground the main ground up front? I'd check that it's secured to clean metal and didn't come loose. It's a tell tale ground issue symptom that when multiple lights are powered the ground cannot handle that much load and turns off. Let me know what you find and we can continue troubleshooting if needed.
    view full answer...
  • Locating a Lighting problem on a Boat Trailer with 4-Way Flat Wiring
    It sounds as if the trailer wiring is wired properly. You can splice into the brown tail light wire at any point and run it to the other side of the trailer. As long as the connector on your vehicle is wired and grounded properly the problem is with the trailer. A couple of things to look at would be the connection of the tail light mounting brackets to the trailer and the license plate bracket on the left side. If the mounting brackets are bolted to the trailer frame, remove them and...
    view full answer...
  • Trailer Tail Light Kit with Brake Lights and Turn Signals on the Same Circuit
    Trailer tail light kit # TL29BK does work on a combined system meaning that the turn signals and brake lights are on the same circuit, which is what you want. You will not have the same issue with it. Please note that this light kit has lights that ground through the mounting studs. The mounting surface must be clean and free of corrosion and avoid putting anything in between the light and the trailer frame. If you do run into a ground problem then make sure that the vehicle side and...
    view full answer...
  • Does the Standard Trailer Light Kit # TL29BK Have Enough Wire To Install on a 6x12 foot Trailer
    You should have more than enough wire, the Standard Trailer Light Kit with 25' Wire Harness # TL29BK that you referenced comes with 25 feet of wire and your trailer is only 12 feet long so you should be good. Check out the review video I attached for this kit as well.
    view full answer...
  • Can Standard Trailer Light Kit # TL29BK Be Used on 5 by 8 Trailer
    Yes, if you wanted to use the # TL29BK you certainly could. It would just be a matter of having more wiring harness than you'd need which can easily be trimmed down if needed. I attached an install video that shows this kit installed on a similar smaller trailer as well.
    view full answer...
  • How to Wire a Ground Wire to a Trailer Light that Grounds Through Mounting Hardware
    What you would want to do is run the white wire on your trailer's wiring to the ground screw area of the trailer light to ensure that the ground will be sufficient for the light. Then you would just run the power wire to the single wire of the light and you would be good to go.
    view full answer...
  • Troubleshooting Trailer Wiring And Brake Controller When Getting Error Codes
    This is a tough problem. We need to start with the signal you are getting to the brake controller. You said you are getting a code for a short when you step on the brakes. Since you said the tow vehicle and brake controller check out, and the trailer is connected to the tow vehicle, the problem would indicate there is a short somewhere on the trailer. This can be an exposed or cut wire between the trailer connector and the brake assemblies. There are times when bad brake magnets can also...
    view full answer...
  • Do All Lights Need to be Grounded on a Trailer with Incandescent Lights?
    With incandescent lights, you do not need to ground both lights. This is something that needs to be done with LED lights due to them drawing significantly less power. However, if you will upgrade to LED lights at some point, it never hurts to have everything already run to where it needs to be.
    view full answer...
  • Difficulty of Installing Optronics Trailer Light Kit # TL29BK On Small Trailer
    A light kit like the Optronics Trailer Light Kit, part # TL29BK, for your trailer is a fairly simple installation if you have average mechanical abilities. I am including a link to a video of the light kit being installed on a trailer and another video of a review on the light kit. These videos will help you with the installation process. Also, I am including a link to a FAQ page on trailer wiring.
    view full answer...
  • What Gauge Of Wire Is The 25 Foot Harness In Optronics Standard Trailer Light Kit # TL29BK?
    The Standard Trailer Light Kit with 25' Wire Harness # TL29BK comes with 18 gauge wires connected to the 4-way trailer side plug.
    view full answer...
  • Replacement Trailer Wiring Kit Recommendation for German Trailer to be Used w US Spec Kia Sorento
    Any time you can get away without using any type of adapter you are better off as that is one less thing to potentially give you issues in the future. That being said you'll want to make sure US style lighting is legal where you'll be traveling. If so the part # TL29BK would be an easy way to rewire your trailer to this style of lighting which would work well with your Sorento.
    view full answer...
  • Does the Optronics Trailer Light Kit TL29BK Include Wire Harness with 4 Pole Connector
    Yes, the Optronics Standard Trailer Light Kit # TL29BK referenced in your question includes a 25 foot wire harness with a 4-pole connector. The kit also includes two red, stud-mount tail lights, two amber marker lights and a license plate bracket. I have also attached a couple of video demonstrations on this kit for you to check out.
    view full answer...
  • Troubleshooting Trailer Wiring Light Assembly that Doesn't Work On One Side of Trailer
    Try swapping the left side light assembly with the right to see if the problem stays on the same side of the trailer or moves to the other side. If the problem stays on the same side there is a problem with the ground or the wiring of the lighting. If the problem moves then you know the issue the light assembly. You may try running a jumper wire for the ground for the bad assembly back up to the main ground of the trailer.
    view full answer...
  • Trailer Right Turn Signal Only Works when the Brake Lights are On
    This sounds like a ground issue and/or a short. Ground problems normally show up when there is more draw on a system such as when you have the running lights on and then use another function like a turn signal or brake light but can show up any time. A short could be caused by corrosion or loose or damaged wiring connections. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean...
    view full answer...
  • Wiring Trailer Lamp With Red and Black Wires
    On the taillight itself, the black is typically the running lamp and the red is usually the brake lamp and turn signal. As far as the wiring on your trailer goes, the brown wire is for the running lights, the yellow is for the left turn signal/brake lamp and the green wire is right turn and brake lamp. If the lamp doesn't have a dedicated white ground wire, it will get its ground connection through its connection to the trailer frame. I've linked to some trailer wiring diagrams that you'll...
    view full answer...
  • Troubleshooting Nissan Truck Not Activating Trailer Stoplights and Blinkers
    Most likely it's dirty pins on your trailer wiring connectors. Specifically the ground circuit not being able to provide the amperage for the brighter illumination circuit of the brake and turn signals so try cleaning that. You should also check for blown fuses and relays under hood as well.
    view full answer...
  • Trailer Light Kit wiring attachment, TL29BK
    You plug the corresponding wires on the TL29BK kit into the upper (larger) holes on the back of the taillights. There are two holes for tail/brake lights and running lights. These holes are labeled. The wires should be stripped prior to insertion. The lower (smaller) set of holes are there to allow removal of the wires if need be. You would stick a small round object into the lower hole and press, releasing the wire. After inserting the wires they should be routed along the indention...
    view full answer...
  • Troubleshooting Brake Controller Installation on 1998 Land Rover Discovery 1
    The issue you are finding is likely due to the way you have your brake controller wired. The brake light switch is the only thing that should be connected to that red wire. The brake light wire for the trailer connection may be back-feeding into the controller the way you have it wired. I've linked a help article to properly installing a brake controller and any changes from the diagram are not recommended as they can impact correct functioning.
    view full answer...
  • Install Video For Standard Trailer Light Kit # TL29BK
    I believe you already have seen the attached diagrams that are on this page, but I think your best option will be to watch the install video I attached for the trailer taillight kit part # TL29BK which will walk you through the whole process.
    view full answer...
    Image 1 for
  • Right Turn Signal Only Works when Brakes Applied on Trailer Towed by 2010 Hyundai Tucson
    This sounds like a ground issue since it is just the turn signal on the right side.. What you will want to do is make sure that the main trailer connector ground and the light grounds are all attached to clean and corrosion free bare metal surfaces. Also make sure the trailer and vehicle side connectors are clean and that the trailer wiring converter on the vehicle, unless it was a factory harness, is properly grounded to bare metal.
    view full answer...
  • New Trailer Light Kit Not Working with 2 Vehicles
    Since none of the lights of the light kit # TL29BK work I'm guessing the problem is with the white ground wire. Make sure it's grounded to a clean, bare metal surface on the trailer's steel frame. If your trailer has an aluminum frame then you need to run a wire from the connector's white wire back to the mounting studs of each light in order to get a good ground. As far as wiring goes the wires are green for right turn and brake lights, yellow for left turn and brake lights and then...
    view full answer...
    Image 1 for
  • Running Lights on Trailer Impeding the Brake Lights from Working
    This could still be a grounding issue. Though the grounding wire may test successfully, there could still be corrosion or buildup that is preventing a full enough connection to power everything at the same time. I would start by cleaning the connection points or moving them to another point if that is easier. Once finished, test the main ground on the vehicle and trailer again. I've included a link to our 4 and 5-Wire Troubleshooting page. If that does not solve the problem, I would...
    view full answer...
  • How do I ground my Standard 4-Way Y Harness on my Trailer
    Yes you are right on track here. The Standard Trailer Light Kit with 25' Wire Harness part # TL29BK has a single white wire that need to be connected to trailer. This wire provides the ground connection from your tow vehicle to the trailer once that is done all of the light ground themselves to the trailer through the metal studs used to connect them. Attach the white ground wire directly to a clean, bare section of the trailer frame using a self-tapping screw and ring terminal. For...
    view full answer...
  • Is the 25 feet of Wire with the Standard Trailer Light Kit # TL29BK for Both Sides of the Trailer
    Yes, from the 4-Way flat connector on the Standard Trailer Light Kit # TL29BK there is 25 feet worth of wiring which you will split down the sides of your trailer. An installation video has been attached for you to use as a reference.
    view full answer...

Do you have a question about this Trailer Light?


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Sarah L
Expert Research:
Sarah L
Employee Robert G
Expert Research:
Robert G
Employee Patrick B
Expert Research:
Patrick B
Employee Michael H
Expert Research:
Michael H
Employee Jeff D
Expert Research:
Jeff D
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Adam R
Expert Research:
Adam R
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Cole B
Installed by:
Cole B
Employee Wilson B
Updated by:
Wilson B
Employee Jenny M
Updated by:
Jenny M
Employee Brian T
Updated by:
Brian T
Employee Noah M
Updated by:
Noah M

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.