Trying to track down a schematic for the above model number. It's a 9 year old Craftsman YT4000, 24hp 46" mower. I've found schematics for similar models on this forum, but would like to get the exact one. I suspect one of the safety switches is bad, it will not start - won't even click the solenoid. Battery is good; solenoid works when 12v is applied; ignition switch checks out ok with an ohmmeter & the fuse is good.