What Wire Is Needed To Add Electric Drum Brake Assemblies To A Trailer
Updated 12/22/2025 | Published 10/21/2024
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Question:
What wire do I need for my trailer brakes from the brakes hubs to the front of the trailer it does not have. Brakes on it now and I am going to put them on it it’s a 3500 lb axle
asked by: Jared H
Expert Reply:
Hey Jared,
When installing electric trailer brake assemblies you'll want to run 10 gauge wire # 10-1-1 from the junction box back to the brake assemblies. This will be you power to the brake assemblies and you can just run the other wire from the assemblies to the frame with a ring terminal # 44-5310A and self-tapping screw for ground. If your trailer doesn't already have a junction box # e99009 and 7-way cable # e99010 then you'll want to pick those up as well.
I've attached a help article we have that goes over adding brakes to a trailer that didn't originally have them to help guide you through the process, but I'd still be more than happy to help you pick out parts or with the installation if you still have any other questions.
Product Page this Question was Asked From
Blue Ox SwayPro Weight Distribution Shank for 2" Hitches - 9" Long - 7 Hole Adjustment
- Accessories and Parts
- Weight Distribution Hitch
- Shanks
- 1900 lbs TW
- Fits 2 Inch Hitch
- SwayPro
- Blue Ox
more information >
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Jameson C.
12/22/2025
Hey Jared, how did the wiring go when you added the electric brakes to your trailer? Your update could make it easier for others adding brakes to a 3,500‑lb axle.