There are many instances where you look to attach trailer to your vehicle. As a result, if you are planning to attach a trailer to your vehicle it is important that you are aware of the concept of the electric brake controller system.
Usually, the trailer itself does not have a brake system and as a result it needs to be installed with the controls that is further connected with the driver in the vehicle. This electric brake system consists of components that are mounted on the trailer and the vehicle. Besides that, there is removable tow bar also given with the set.
As a result, when you need to control the brakes, you need to have the electric brake controller strategically placed in a location that is easily in range of the driver. Ultimately, the left and right electric brake components are attached to the trailer, an emergency brake kit and drum and hub assemblies.
It is important for you to know that electric brake system requires a brake controller to be able to brake the car with the application of power to the brake system. So, the heavier your trailer the stronger and more powerful brakes system you will require. If the brakes are synchronized with the vehicles brakes it will provide the driver a better chance and prevent the trailer from swaying away.
Thus, this is how electric brake systems work.
Source: http://towbarsmelbourne.blogspot.com/2017/12/understand-working-of-electric-brake.html