Radio fuse keeps blowing. Help please!

[72blazerblue]

Okay so about a month ago i put in a new radio. Its one of those digital ones that has that "factory" look to it. It has worked awesome. The other day i ramdomly blow a fuse and now evertime i change it it blows after about five seconds of being on. The radio has a ground wire, a wire that goes to the spot on the fuse box, and one that goes to the battery for memory. I have checked them all. Even moved the ground to different places.
Has anyone had this problem or can tell me what to do? I am stumped.
Do you think it could be getting too much voltage from the memory wire and i should put some kind of resistor on it ? Or maybe i need to add some grounds from body to frame?
Any input is appreciated!
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