What Gauge Wire Should Be Used For Optronics STL17RB And STL16RB Tail Lights?
Updated 11/03/2025 | Published 01/16/2025
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Question:
I have a 18 foot trailer that I am installing 2 rear led lights part numbers STL17RB and STL16RB and 5 led side marker lights part number C525A and 4 led side marker lights part number C525A. My question is what gauge wire should I use for installation. Also I am running new wire to the electric brakes that use magnet part number AKBRKR-M12 on 4 wheels what gauge wire should I use ? Thanks
asked by: Terry
Expert Reply:
Hey Terry, thanks for reaching out. For the Optronics # STL17RB and # STL16RB tail lights 16 gauge wire is what I would use. For the brakes you will want to use at least 12 gauge wire. If it is a shorter trailer you can get away with 12 gauge, for longer trailers say 20' or longer you may want to up that to 10-gauge. We sell this wire by the foot if you need some. Take a look at the following:
- Deka Jacketed 2 Wire, 10 Gauge, Brake Wire - per Foot # 10-2-1
- Jacketed 2 Wire (Brake Wire) - 12 Gauge - per Foot # 12-2-1
- Deka Wire - Jacketed 4-Wire - 16/4 Gauge - per Foot # DW03240-1
I hope this helps and let me know if you need anything else.
Product Page this Question was Asked From
LED Tail Light for Trailers Over 80" Wide - 8 Function - Submersible - 22 Diodes - Driver Side
- Trailer Lights
- Tail Lights
- Brake/Tail/Turn
- License Plate
- Marker
- Rectangle
- Surface Mount
- Submersible Lights
- LED Light
- 8-1/16L x 2-7/8W Inch
- Red
- Optronics
more information >
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Jesse M.
11/3/2025
Hey Terry, how did the wiring go for your trailer lights and brakes? I'm curious if the 16-gauge and 12-gauge wire setup worked well for your layout. Your update could make it easier for others working on similar trailer wiring.