I have a John Deere STX-38 lawn tractor that won't start. Normally,
when that happens, I can pick up the front of the mower and let it
drop to the ground and, viola!, the engine will start. Obviously,
there is a safety switch that wasn't aligned properly and, by dropping
the mower, things lined up.

NOW I can't get the engine to start regardless of what I do. When I
turn the key to "run" (not "start"), I hear a click indicating that
"something" is engaging. It is NOT the starter trying to engage with
a dead battery.

I need a wiring diagram for the electrical system OR some suggestions
of probable failure locations in the "safety switches" in the starter
circuit. The wiring is not hard to trace if you know where it is
supposed to go.

TIA

Chuck