werent you in here askin how to hook up a dvc sub just like a week ago?
he said his wires were straight on the first post, so im assuming he checked the grounds. if you dont have a load on the amp and its in protection, its probaby smoked. what kind of amp is it? did you disconnect the inputs too? it might be something simple but its hard to tell without actually being there. bench test it, or try it in another car that already has a working setup.