ok new here got a question i am hoping forsome enlightenment as fori am at a loss for this. what we have is a 93 caprice sedan, 5.7L. problem is this, im workin on the car for a friend and hes lost his dings and bells, radio, and a/c. all possibly simultaneously, and the a/c could have happened at a later time as the other two things, not sure. 10A fuse was blown. replaced with a 10, nothing. he listened to some guy andput in a 20, nothing. car also has an aftermarket radio that he put in himself. i cant figure this one out, this also happened right after i put in a brand new alternator. this could be related to the voltage regulator? i hope not. its probably the radio, right? a bad connection, crossed wire maybe? any help would be awesomly appriciated. thanks in advance