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Trailer Brake question
I recently bought a used utility trailer with (maybe) electric brakes.
I haven't pulled a hub to see for sure yet. But there is a disconnected breakaway switch on the tongue. So I'm assuming there are some brakes under there.
My question is.
To activate the brakes is electricity applied to the brakes?
Or does electricity keep the brakes pulled away from the hub and removing the electricity lets the shoes contact the hubs?
Seems it would have to be the latter, or the breakaway switch would be of no purpose.
That said my hubs spin freely connected to my truck or not. And I know they are not working because my brake controller tells me so.
Thanks in advance.