theres a wire out on one of the amps so i pluged it back in and a blue light came on and the subs still didnt work friend told me it might be a fuse if it is a fuse where is it located the amp fuse i mean?

 

well the fuse for the amp should be sticking out the side and be pretty obvious. But without knowing which wire came out its kinda hard to know what happened. oh or if you're talking about the amp power fuse then it should be within 12 inches of the battery terminal.

Heres the best way --> grab a multimeter and test your power, remote and make sure your ground is solid. if all those are fine then check your sub to see if it is blown. If there is power going in the amp and the sub is not blown then there are only two options left... a) your output from the deck is fried or b) something internally in your amp is fried.

and if the above seems a little confusing or you do not have a multimeter bring it to a shop and they can diagnose it for you.