How to Change Out Trailer Hydraulic Surge Brakes to Electric Brakes

Updated 04/06/2018 | Published 04/05/2018

Products Featured in This Question

etrailer Electric Trailer Brakes - 7" - Left/Right Hand Assemblies - 2,000 lbs

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$95.79

10 Gauge Wire - Blue Primary - Per Foot

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$1.65

etrailer Electric Trailer Brakes - Self-Adjusting - 10" - Left/Right Hand Assemblies - 3.5K

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etrailer Electric Trailer Brakes - Self-Adjusting - 12" - Left/Right Hand - 5.2K to 7K

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Wiring Kit for Hydrastar Electric Over Hydraulic Actuators

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Question:

I have a boat trailer that has a non functioning surge brake system, leaks and is past point of cost effective repair. How hard would it be to switch it over to an all electric system. I know it would need all new parts but any possible for seen complications? Thanks so much

asked by: Tim M

Helpful Expert Reply:

Switching from a hydraulic braking system to electric is actually a lot less complicated than the other way around. You basically just need to lock out your surge brake actuator, swap out your brakes, and then add some wiring and a breakaway kit on the trailer side. I can actually let you know what you will need right now, but if your hub and drum assemblies need to be changed that will require some additional information.

You can determine what replacement brakes you need by simply measuring the inside diameter of your hub and drum assemblies. If the diameter measures 7" you need part # AKEBRK-2, if it measures 10" you need part # AKEBRK-35-SA, and if it measures 12" you need part # AKEBRK-7-SA.

If you already have a 7-Way installed on your trailer then adding some wiring is very easy. You just need to run 10 Gauge Wire # 10-1-1 from the pin in the 7 o'clock position back to your brake assemblies (see attached picture). The brake assemblies have 2 wires; one for power and one for ground. If doesn't matter which wire is used for which function.

If you don't have a 7-Way then I recommend installing the Trailer Wiring 7-Way Upgrade Kit # HS381-9000 which includes a junction box for easy installation and all of the ring terminals that you need.

The most popular breakaway kit is the Hopkins # 20099 which includes a battery that has a built-in charger and that you can test with the push of a button. It is a favorite here at etrailer and has received great customer reviews.

To activate the trailer brakes you will need a brake controller. If your tow vehicle isn't already equipped with one then I recommend using the Tekonsha Prodigy P3 # 90195 as it is easily installed and features an LCD screen for easy operation. Let me know what the year/make/model is of your tow vehicle and I can give you some details on the installation.

I have linked some videos and helpful articles that you can reference as well.