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:$34.36
Our Price: $32.17
You Save: 6%
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 (425)
  • 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   (425 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:

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:

The kit parts were good quality and clearly marked. The order arrived quickly and the kit was a good value.



by:

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



by:

Exactly what I needed, plus very fast a rrival.



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:

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:

old boat trailer, new Kayak trailer



by:

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



by:

Good looking lights. Installed easily.



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:

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 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:

Light kit from etrailer installation pi ctures.



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:

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:

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:

worked as expected price was good



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



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:

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:

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:

TL29BK was easy to order, was delivered in a timely manner, and was a perfect match replacement for my 2010 Singer, Utility trailer. I was very much pleased and will certainly order from etrailer again if replacement parts are needed.

Fab

7/11/2019

The Standard Trailer Light Kit with 25 Wire Harness is of very good quality and pricing and the order contained everything thing needed. I recommend this product.


25
425
Show More Reviews

See what our Experts say about this Optronics Trailer Lights

  • 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...
  • 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
  • Lighting Requirements for an 8-1/2-Foot Wide Trailer for Use in California
    You came to the right place. There are very specific requirements for trailer lighting that depend on the dimensions and gross weight of the trailer. Trailers over 80-inches wide - including yours - have very specific minimum requirements for clearance and marker lights. The linked article explains these requirements in complete detail, with diagrams, and it even includes links to get you to the right items. I have also provided a link to the main product page for trailer lights. You...
    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...
  • Ways to Install New 4-Pole Trailer Connector
    Four flat trailer wiring, also called 4-pole wiring, uses four wires and pins configured as shown in the linked photo of a trailer side 4-pole connector. The one pin that is different from the other three (on both trailer and vehicle side connectors) will be the ground pin and this usually has a WHITE wire that will ground to a clean bare metal spot the trailer frame with a ring terminal. The next pin is for the running light circuit and this typically uses a brown wire to activate the...
    view full answer...
    Image 1 for
  • Replacement Tail Light for 1998 Jayco Travel Trailer
    Trailer manufacturers do not often maintain original parts information (or availability) for items such as lights, but we can certainly help you find a suitable replacement. You may want to just install a whole new light kit like # TL29BK or a high-efficiency LED kit # TLL9RK. This will avoid the same problem of no replacement part if the other light on your trailer should be damaged. Both kits include lights, a license plate bracket and all hardware. If you prefer to replace just the...
    view full answer...
  • How To Ground Trailer Tail Lights Without a Ground Wire To a Wooden Surface
    The Standard Trailer Light Kit with 25' Wire Harness part # TL29BK as I am sure you noticed grounds via the mounting hardware therefore there is not a singular ground wire. In order to attach this light to a wooden surface you will need to run a ground wire yourself up to the trailer tongue using the mounting studs on the back with ring terminals part # DW05705-1 and wire part # 12-1-1. The other option you have is to use the Peterson LED Light Kit for Trailers part # V944 which does have...
    view full answer...
  • Troubleshooting Running Lights of Trailer Light Install Not Functioning
    Can you verify which of your trailer circuits is the running light circuit using a circuit tester like part # PTW2993 and then wire that circuit to the brown wires of your trailer light kit and then run the stop and turn circuits to the other wires of the trailer. I attached a couple help articles for you to check out as well.
    view full answer...
  • Instructions for Using Optronics Trailer Wiring Kit # TL29BK
    Optronics doesn't offer instructions for the # TL29BK trailer taillight kit. However, if you click the link I provided to the the trailer wiring help article, you'll see a wiring diagram showing how the kit would be used to wire a trailer. The wiring system shown in the diagram is more elaborate than what you'd have, so you'd ignore all the wire colors but the white, green, yellow and brown. The green wire feeds the right turn/brake lamp. From the front of the trailer, it would run along...
    view full answer...
    Image 1 for
  • Recommended Towing Lights in California for Small Trailer with 2014 Toyota Prius
    The magnetic towing kit you reference is designed for flat towed vehicles and should not be used for trailers. We do have standard trailer light kits like # TL29BK which use a 4 pole connector. I have included a video review of this kit that you can check out. Despite the fact that there are trailer hitches made for the 2014 Toyota Prius, you will need to consult the owner's manual as to whether you can tow with the vehicle at all. You will also want to check your owner's manual or with...
    view full answer...
  • Troubleshooting Trailer Lights Going Out When the Brakes are Applied After Trailer Light Kit Install
    It sounds like you have a ground issue. When trailer lighting does not have a sufficient ground many different scenarios can show up, but the most prevalent is when the most amperage is applied, like tail lights on and brake pedal pressed, the lights go out. All lights must be properly grounded for proper function. When installing the standard trailer light kit, # TL29BK, the lights are grounded through the mounting studs. You need to make sure that the mounting studs are contacting the...
    view full answer...
  • Wiring a Trailer with the Optronics Trailer Light Kit
    First, you will need to use the 4-Way trailer side connector with the 25 foot loop of wire, included in the Optronics Trailer Tail Light Kit, item # TL29BK. Of the five wires present, the white is the ground, the yellow is the left turn/brake signal, the green is the right turn/brake signal, the yellow with brown stripe is the left running light signal, and the green wire with brown stripe is the right running light signal. You will need to run the yellow wire to the left side light, the...
    view full answer...
  • What Gauge Wires Are Used With The Wiring Harness In the Standard Trailer Light Kit TL29BK?
    The wiring on the 25' harness uses 20 gauge wiring for the tail light wires in the Standard Trailer Light Kit # TL29BK. I recommend using the Heat Shrink But Connectors # DW05743-10 where you will need to splice together any wiring for a dry, corrosion resistant connection.
    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...
  • Does Trailer Lighting TL29BK Meet FMVSS and DOT Requirements
    The Trailer Taillight kit part # TL29BK does fit all DOT FMVSS requirements. If you are unsure if you need more lighting/conspicuity tape I attached a help article that covers lighting requirements for trailers based on size. The part # RE18T is a set of 18 strips of conspicuity tape that is 18 inches long and 2 inches wide.
    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
  • How to Attach a Trailer with a 3-Way Connector to a Vehicle with a 7-Way Connector
    A 3-way trailer connector is extremely rare and they really do not make any sort of adapter that will allow you to use this trailer connector with a 7-way connector. The only option that I have for you would be to replace the 3-way trailer connector with a 4-way trailer wiring harness and then use a 4 to 7-way trailer connector adapter. It is required by law in most states that your trailer has turn, brake, and running lights therefore if your current trailer's lights do not have these...
    view full answer...
  • Installing 4-Pole Trailer Connector on 2000 Chevy Slilverado
    Are you speaking of the wiring harness located above the spare tire? The harness is wrapped in wire loom, and should contain a yellow wire (left turn/brake), dark green wire (right turn/brake), brown wire (running lights) and a white ground wire. Peel back a bit more of the loom, and you should find a light blue and a light green wire. The light blue provides a signal for a third brake light if you installed a camper shell and the light green wire is for the reverse lights. A typical 4...
    view full answer...
    Image 1 for
  • Replacement Wiring Harness for a 2007 Thule 1205 Trailer
    To replace the lights and wiring on your 2007 Thule 1205 Trailer you will want the Optronics Standard Trailer Light Kit with 25' Wire Harness item # TL29BK. This kit contains two stud-mount tail lights, two stud-mounts, amber clearance marker lights, a corrosion-proof license plate bracket, and a 25' wire harness with a 4-pole trailer connector. In order to make a recommendation for a replacement coupler I will need to know the width of your trailer's tongue. If you could get back to me...
    view full answer...
  • Troubleshooting Trailer Taillights that Have Power but Do Not Function
    Are you referring to the trailer wiring kit you bought from us or the trailer lights I see that you ordered at same time? I would assume it's the light kit part # TL29BK which since you tested and the lights have power ran to them that would indicate the issue is the ground circuit. These ground through the mounting hardware so make sure they are mounted to a clean metal surface. If you tested them before mounting them that would be why they aren't functioning since they wouldn't be grounded.
    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...
  • 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...
  • Troubleshooting Running Lights Not Working
    There are many, many different reasons why your lights could not be working. In many cases a bad ground is to blame for this type of issue, but in order to determine the specific problem you will need to use a circuit tester such as # PTW2993 to test the connector on your vehicle after disconnecting it from your trailer. Check the wiring going into your harness from your taillights to see if those wires are carrying the correct signals, if not then the issue is with the vehicle wiring....
    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...


< Previous
123. . .4



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.


Product Experts Available Now!
Call 1-800-940-8924