We have a 2018 Forest River Acadia. Brand new when we purchased a year ago from Camper's Inn. We pull with a 99 Suburban. Initially when we would plug in the brake controller, we had no issues with all lights and brakes. Now, when we plug it in, the tail lights and signals work, but the trailer brakes do not activate when plugged in. We stopped by a local camper dealer on our way to the mountains (because no one wants to come down from the mountains without trailer brakes 😱) and they were unable to determine if the issue was coming from the truck or the camper. Anyone have an idea of where the issue could be coming from? The camper does have an extended warranty but I would like to at least have an idea of where it is coming from first before we try to send it in, knowing it will be weeks before it gets fixed.Thanks!