Electrical gremlin. Dart won't start. Desperately seeking insight!

Check the connectors for being plugged in all the way, and don't randomly pull at things.

I had an issue with my connector going from the ignition switch to the bulkhead. I found that the plug was worn out and would randomly lose contact which would shut the car off while driving down the road. It would also fail to start until I pushed the connector back together. I finally cut it off and rewired it, and all the problems went away.