Need Tail Lights And Wiring For 5x7 Utility Trailer
Updated 09/26/2025 | Published 04/26/2025
Products Featured in This Question
Question:
Hello! I recently bought an old trailer from a neighbor for hauling. The cab is. maybe 7x5. I bought a trailer hitch from trailer many years ago for my Mazda CX-5, and just looking for two lights for the back of this trailer to be able to plug into my hitch so that its clear when I am putting the brakes on. I see some of these are clearance lights, etc., and am not the most familiar, but, I just need two red round lights to attach so that someone behind can see, from the back of their little trailer, when I hit the brakes. Just looking for an inexpensive, easy to install, option. Thanks! Greg
asked by: Greg G
Expert Reply:
Hello Greg, thanks for reaching out. Really any stop, turn, taillight could work for that purpose. The Optronics LED Trailer Tail Light # STL42RB will be a great option as long as your have a solid surface to mount to. The mounting holes are 4-1/4" apart on center.
To wire them up you will need the Right Angle 3-Wire Pigtail for Optronics Trailer Lights # A47PB. Then to wire the trailer you will just need a 4-way harness like part # A35W42B. This is 35' long so you can cut it down to size for your trailer.
It looks like you did order a 4-flat harness for your Mazda, so that vehicle will already be prepped for the trailer plug. Install the lights and wire up the trailer and you will be good to go. Take a look at the video and article I linked for you below.
Please let me know if there is anything else I can do to help.
Product Page this Question was Asked From
Optronics LED Trailer Tail Light - Stop, Turn, Tail - Submersible - 10 Diodes - Round - Red Lens
- Trailer Lights
- Tail Lights
- Brake/Tail/Turn
- Round
- Recessed Mount
- Submersible Lights
- LED Light
- 4 Inch Diameter
- Red
- Optronics
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Search Results: command electronics trailer lights
- Search Results: rv plug adapters
- Search Results: trailer lights
- Video: Review of TecNiq Trailer Lights - Clearance Lights - TN79AR
- Video: Review of Optronics Trailer Lights - Amber LED Smoke Lens Mid Ship Turn Intermediate - OPT52KB
- Article: Trailer Wiring Diagrams
- Q&A: What Replacement Converter Do I Need for a Series 7300 Model 7345 Converter?
- Q&A: Replacement Lights for 1989 Interstate Box Trailer
- Article: Trailer Lighting Requirements
- Q&A: Replacement Trailer Tail Light For Bargman 47-54-001 LED Tail Lights
- Q&A: Recommended Replacement Brakes for a Jayco Eagle Superlite 31.5 RLDS 5th Wheel Trailer
- Q&A: Recommended 3-Prong 3-Wire Pigtail for a Optronics Trailer Tail Light
- Q&A: Replacement Marker/Clearance Lights For a 2006 Ranger Trail Boat Trailer
- Q&A: Solution for Replacement Side Marker Light for Glo Brite 9823R-88
- Article: Testing Trailer Brake Magnets for Proper Function
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: Electric Trailer Brakes: How They Work & What to Buy
- Article: Trailer Drum Brakes vs. Disc Brakes: Making the Decision
- Article: How to Measure Your Trailer Wheel Bolt Pattern
Jesse M.
9/26/2025
Hey Greg, did you get a chance to install the Optronics LED Tail Lights on your trailer? I'd love to hear how it worked out for you, as it could help others looking for a similar solution.