Truck wont start - HELP

[1969Chev]

I have a 69 c20. My dad had purchased it about 18 years ago and it had a push button in it. The wiring to this truck under the dash is kinda iffy. His wiring buddy took it out and made the regular key work again. Last year that had stopped working for some reason so i had put another push button back in to bypass the ignition. I had done it by splicing into the purple wire on the wiring harness on the engine side of the firewall, and running that to one side of the button, and the other side of the button went straight to the battery. now that isnt working as of this morning. I cleaned up all my connections, cleaned up the wire that goes from the positive terminal on the battery to the fender, cleaned that whole thing that that wire goes to. And i even maybe thought the push button went bad so i undid those wires and turned the key and touched them together and nothing. So i dont know what now. I can jump the starter and it fires up, but it wont fire up from the ignition or button. what should i do?