I know this isn't a mower forum, but I know a few of you guys have them, so I thought I'd throw this question out. My zero-turn mower suddenly decided not to start anymore. When you turn the key, nothing. First, I thought it must be the battery, but the battery is good, wiring all looks good, starter cranks when you jump the starter solenoid, but no start. The mower has five relays in the electrical system and I tried switching them around, (thought maybe a bad start relay) still dead. Replaced the PTO switch, as a worn out one can cause this, but that wasn't it either. Anybody know if a bad relay (not just the start relay) anywhere in a system could cause this? I'm really stumped. Oh yeah, and I put jumpers on the safety switches to rule those out.