How to Wire Optronics ST8RB Trailer Tail Lights Without a Plug
Updated 08/29/2026 | Published 08/24/2026
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Question:
Hello, I have two of your replacement Tail/Brake/Side Marker products to put on my utility trailer. But I cannot see how to connect the wiring to the product. Is there an electrical plug that connects the wiring to the product or ??? Thank You
asked by: Peter M
Expert Reply:
Hi Peter, you do not need a separate electrical plug for these lights part # ST9RB and part # ST8RB The stripped ends of your trailer wires insert directly into the connection ports on the back of the Optronics ST8RB replacement light. I know it can be a little confusing when you first look at the back of the light and do not see a traditional plug, but the wiring connects directly to the light.
You can use 16 or 18 gauge wire for the connections. If you need new wiring, the 16 Gauge, 4 Conductor Bonded Parallel Wire, part part # 16-4B-1, is one option you can use. The video I attached also shows how to insert the stripped wires into the ports.
What do you use the utility trailer for, yard projects, work, or weekend adventures?
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Product Page this Question was Asked From
Combination Trailer Tail Light - 7 Function - Incandescent - Square - Red Lens - Driver Side
- Trailer Lights
- Tail Lights
- Brake/Tail/Turn
- License Plate
- Marker
- Square
- Surface Mount
- Non-Submersible Lights
- Incandescent Light
- 5-3/16L x 4-9/16W Inch
- Red
- Optronics
more information >
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