no power through stock radio power wire

hi everyone, i was switchin out my friends radio in her 98 contour for an aftermarket one. somehow i managed to touch the 12v constant to the ground and what do you know, no more voltage coming from the constant wire. the fuse was popped, so i replaced it. still no voltage. i AM getting 12v thru the ignition turn on when the ignition is in, but not the constant. i dont think i could have fried the wire, it was a very slight contact with the ground... any ideas?

The constant power supply for the radio memory is on a different fuse than the radio. Check the room fuse and the mirror fuse. You did that? Can't help.