Help me troubleshoot my non-working horn

[crawdad]

I'm slowly but surely trying to get all of the little things fixed and working properly on my 85. Next thing is the horn. Can someone please tell me how to troubleshoot the horn to try and find out what's wrong with it. Initially there was only one horn on it, but I went and got another one and got it on and plugged up. No sound what-so-ever. So, where do I start, with the horn itself? What can I do to see if the horn works and where do I go after doing that? Thanks for your help. P.S. I am electronically ignant.