Hello dpica15 and welcome to the forum. Glad to have you here.
You have a question that fits my "Area" of experience.
You said you pulled the fuse for the radio and detectors, are you talking about the each individual fuse or one main fuse?
The reason I ask is because they may be labeled as "Radio" or "Oven" or etc... but they may have other devices connected as well. Radio fuse could be for the TV, Radio, Some Lights and outlets.
Are you sure you shut off the TV antenna booster? That will drain a battery real quick (2 days). Otherwise I would have the dealer check your battery and see if you have a shorted or dead cell.
Good Luck and let us know what you find out!!!