2005 boxster S
 

I am a proud new owner of a 2005 boxster S. I have two tech related questions. A strange thing happened after driving my car home for 6hr my stereo stoped working (the bose system) I figured it had overheated, left it for awhile and then it worked. But now my sub dont work? Any ideas, Is there a reset or a blown fuse. Where is the fuse? And I live in Canada and need to get day time driving lights. Can I just install a relay or is it more complicated?

Thanks Rob.