2002 Pontiac Aztek fuses

My button for the back hatch would not work. I pulled the fuses and found nothing wrong but the hatch button worked afterwards the button worked. While I was pulling them the horn went off. A security light comes up on the dash and the horn sounds at random. The Ac went out then and door locks would open and shut at random. I pulled the horn fuse #(3) and #(28) Battery control fuse or something like that. The ac works again andd the windows and hatch are fine but the horn still goes off if I put the fuse in. Is there a way to reset the security feature or what would be causing this malfuction. Should I have had the power to the fuse box unhooked when I started pulling fuses?