Thanks for all of the help guys, VERY much appreciated!
Just to clarify, the harness is an American Autowire full harness. No horn relay so that is out of the picture. I will be doing exactly as you all have suggested. Going through EVERYTHING! I have to now just isolate the problem AND for my own piece of mind...
I have my work cut out for me but I have this week off so I will be getting into this full time the next few days. Wish me good crimps and no open circuits!
Mark