Welcome to the forum.
I would first inspect the connections on the amp.
I'm assuming it's the CDR 23 stock radio and Bose Amp?
I don't think that any of the relays will have an effect on it, just the fuses.
I haven't worked on those much, but someone else should be along shortly...
Meanwhile, have a look through these:
https://www.google.com/search?q=site%3A986forum.com+cdr23+no+sound