Bush hugged for several hours. Shut down to eat supper, and won't start when I returned.
Fuses checked. Cleaned all ground connections that I know of(under seat, at firewall, and batter cable at both ends).

Signal wire at starter relay is hot with ignition ON, then goes open when switch is turned to start. This is why I went straight to checking grounds. Next step seems to be replacing ignition switch.

Anything I'm missing? I hate throwing parts at an electrical problem, especially as simple as this system seems to be, but the 2300+ page technical manual offers zero help with wiring.