Posted 8/6/2022 04:04 (#9782699 - in reply to #9782675) Subject: RE: Stock Trailer Brakes
NS Canada
You didn't pull the emergency breakaway switch at the same time did you?
edit,I see you disconnected that battery. Do you hear the brakes as soon as you plug in to truck? Jack up trailer with all power disconnected and see if you can spin each wheel.