Bad PTO clutch? This one should be easy...
 

...for experienced techs to help me out with...

I own a 2005 Super LT1554. Mower deck quit on me last week with the engine still running. I removed and Tested the PTO switch with my voltmeter. Turns out fine. I removed and tested a relay. That's okay too. I used a good battery and connected directly to the PTO using test wires, and no "click" From the few videos I've watched online, the PTO should click. I'm about to invest in a new PTO clutch, but I would appreciate any advice.

What does it read when you check it with an OHM meter?

I'm by no means an experienced tech, but if you do in fact need a PTO clutch I cannot recommend www.xtremeope.com enough! I called them last week and they helped me deduce that my PTO clutch was bad. I placed the order over the phone and got my clutch 2 days later! Good luck with your repair!