Small Engines (Lawn Mowers, etc.): Craftsman riding mower, neutral safety switch, safety circuit

Question
19 horse twin.   Q. is about the safety circuit that shuts down the magneto.
I'm a knowledgable electric/electronics tech. but don't have diagram.  have checked seat shut off switch.  It is ok.  Need to  know what other safety shut off switches and components can shut off the magneto. Mower will run with the shut off wire disconnected from magneto.  There must be a short or one of the safety shut off switches is activated.  

Answer
 Hello Rick:

 Go to this Site http://www3.sears.com/ and Click the Lawn Equipment Box. Then follow the Direction to the View Diagram/View Parts List Page. There you can View the Wiring Harness and Other Components of the Mower. Some of these Mower have a Relay Under the Seat that Cause this Problem. There is a Neutral Safety Switch and Blade Safety Switch that will Stop the Coil from Firing. Hope this Helps. Let me know what Happens, Please. I really Enjoy knowing the Outcome. Thanks.

 Good Luck

 Respectfully

 John