HELP!!! 82 cb450 nighthawk wont start

my94f2

Been Around the Block
building up my bike. was riding all day yesterday. got home and went to start it and nothing. no spark. so i replaced the coil with the one of my kz400. rode today. no probs. came home home and went to go again and nothing. no spark. wth??!! also now it wont even crank using the button. but if i jump it from the starter side of the starter relay it will crank but no spark. any clues???
 
Sounds almost like a problem in the switch block. It's as if there's too much current going through the switch and it arcs when you turn it off. I'm sure there's a simple answer.
 
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