Jaybrown

Hi guys newbie to this forum, I have a 1996 f150 inline 6 300 that lost power to the cab. It was running fine and went to start it this morning and then no power to dash anything. So charged battery still same problem, the buzzer noise would come on weak when i first turn the key on then would go to normal noise and when i stepped on the break the dash went out. I tried it again and tried to turn it over but it just clicked and everything went dead again. No blown fuses not sure what to do???
Thanks guys for the help