Z225 Electrical Issues

I have a 2009 John Deere Z225 EZ-Track mower which is having an electrical problem that started three weeks ago. As I was cutting (electrical pto engaged), the mower would begin to sputter and stop cutting. The engine did not shut down, but would sputter. When I disengaged the pto, the mower would run correctly with the same power as before. At that time I removed all connections and cleaned them, this included all on the wiring harness as well as the battery and solenoid. It appeared to fix the problem. Then the next week, the problem started again. I did research on line and it was recommended I change my seat safety switch which I did. No success. However, when the problem would start (it is not continuous) I would stop the mower and disconnect and reconnect all the points within the wiring harness. This would work for about 10-12 rounds on the mower and then it would start again. Thought it might be the electric pto, so I replaced it. No success. Then this past week when I cut the mower off to do my disconnect reconnect process, the mower would not restart. I checked the ignition switch connector and there was 12.99 volts coming to the positive wire into the switch, so I thought I had a bad ignition switch and ordered one. No success. As I was working on the system, I noticed when I moved the steering lateral off the switch, power was restored to my led hour meter. However, I still could not start the mower. I then conducted more online research and came across a way to check the solenoid. In doing this, I found that there was no power going to my starter by checking the ground post on the four post solenoid. The starter will turn over as I have tested it by straight wiring it.

I am now approximately $80 into parts and no closer to a solution. Does anyone have a suggestion?

Gmckinney