Mower deck will not engage...

[le]

I have a Red Raven 7100. I have tried all the suggestions in the forum and it still will not engage:

• Safety Seat Switch -- it stopped the Raven when in motion and I raised off the seat -- so I am assuming it is functioning properly -- does anyone know if it is a two phase switch meaning different function for movement and mowing?
• Both fuses are good -- they do not look blown or at least the element is intact
• There is voltage at the plug for the mower deck 
• The deck pack is fully charged

I did notice the High/low adjustment was not totally engaged for low and slipped it back in, but the mower still will not engage. 

Questions:
1. Could this be the Mower engage switch? 
2. Could this be the PTO Relay?
3. is there any hidden secret I am not aware of? 

When this happened I was on a slight sideways incline -- it stopped one, I disengaged and re-engaged, it started and ran for 30 seconds and stopped for good.

Any suggestions? 

Thank you much in advance...

[crawford]

are you sure you are in low range.