I can start the tractor.Welcome John,
I am in NH too.
What kind of trouble are you having with your safety circuit?
That was my next question - anyone have a wiring diagram?First thought, Sounds to me like one of the safety switches is not working correctly (or at all)
Do you have an ohm-meter? I would Test each switch to make sure they are all working 1st.
If you have the wiring diagram that woould help too.