I had a brain fart with Hulk II today. I needed to move him and all I got was a click, so I started troubleshooting. Battery is a 2010 but showed full charge. The terminals were covered in white corrosion so I cleaned them and replaced with new hardware. Still only a click. I jumped the solenoid and he cranked, so I got out the multi-meter and checked the solenoid wire for juice. Nothing there. Checked the 30A fuse, good, Checked the Clutch safety, good there, followed the white wire to the PTO switch, (not standard, but wired correctly) and found the switch to ne in the "ON" position. OOPS.
All is fine now.