Parts Needed To Convert To Electric Brakes On 2004 Bri Mar Dump Trailer
Updated 08/07/2026 | Published 08/01/2026
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Question:
I have a 2004 bri mar dump trailer with surge breaks and 10 inch drums with 5 on 4.5 bolt pattern wheels. I want to convert to electric brakes. What electric backing plates would I need..?
asked by: Robert C
Expert Reply:
Hey Robert! If your trailer has 10" brake drums with a 5 on 4-1/2 bolt pattern, there's a good chance you have 3,500 lb axles. I can't say for sure based on the trailer year and model alone, so you will need to confirm this.
If they are 3,500 lb axles with a standard 4-bolt brake mounting flange, you can use the etrailer etrailer Electric Trailer Brakes # AKEBRK-35-SA along with # BRKH10B for replacement hardware. You will also need to add a 7-way using # e99011 and then some 10 gauge wire # 10-1-1 to run back to the brake assemblies.
Do you already have a brake controller on your vehicle?
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Product Page this Question was Asked From
etrailer Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand Assemblies - 3.5K
- Trailer Brakes
- Electric Drum Brakes
- Standard Grade
- Self Adjust
- 10 x 2-1/4 Inch Drum
- 3500 lbs Axle
- 13 Inch Wheel
- 14 Inch Wheel
- 15 Inch Wheel
- etrailer
more information >
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on Trailer Brakes
Seadog
8/7/2026
Robert Good idea to upgrade the brakes on your dump trailer. Myself I went with the brake kit which included all the required hardware required at the wheel. I made the mistake of trying to go cheap with knockoff china junk at first with really crappy results just trying to save a couple of nickles. US made brake kits from like Dexter in my estimation are the only way to go and cheap insurance. With that said you might talk to your insurance company and see if they won't give you a break on the premium for the DT. Bottom line I'm very pleased with the performance of my electric brake conversion both in stopping and the peace of mind know I can stop the trailer. good luck SeaDog