I've been having a rough time with my car unit, usually every couple days the signal will be too weak to listen to anything, often searching for signal, or telling me there's no antenna connected.
Today the signal starts coming in spotty, exasperated I started unplugging and plugging back in. As soon as I removed the antenna cable completely from the receiver, I instantly got a clear strong connection. How is this even possible, and are there any ideas what this could be?