Don't know how different the '01 is to the '99, but you should be able to check and test them.
I've had my dashboard all apart and while it's fiddly, it's not hard to do.
You will need to remove the fly screen if you have one, then you should see how it comes apart.
If they have all stopped working at once you may just have a bad connection, or broken wire somewhere. If no one has the right information for you, PM me with some detailed photos and I'll check it out for you.
Mick