PTO or clutch gone bad?

[iris]

Have a Hustler Mini-Z Zero turn. Done some lawn care/ landscaping since 2005. No longer doing commercial work. The Z had paid for itself over the years, now mostly cutting ours and families' yards.
Have clutch issues. PTO doesn't even click when pulled out. Got switch today. Doesn't seem to make any difference. Am wondering if it may be wire harness (female plug ) burned out in wire harness as well. Any ideas?

 

[ILENGINE]

Make sure you are getting 12v at the clutch would be the fastest way to check the wiring harness. If you have power there, then if possible if you have the adjustable clutch, characterized by the three nuts and springs in a triangle shape, try adjusting the air gap by putting a .012-.016 feeling gauge between the plates there are through the slots next to the nuts. You can also run a continuity check on the clutch, and most should run in the 2.4-3.4 ohm range.