Hard start...

You are kinda on your own from here, as I have no idea what has been done with wire routing or wire colors between the ignition switch and the bay. I also have no idea what was done with the bulkhead connector, or what condition the terminals might be in.

And TEST this AT THE KEY SWITCH, because it is possible that it is screwed up internally. Take your meter/ lamp, and see if the "run" is hot in run, and if the brown bypass is hot in "start." Then trace from there.