so...they called me.....and asked when I can come look at it.
   
  me: so...are any of the sensors working?
  him: no
  me: have they been working at all? when did they last?
  him: hmmm...im pretty sure they didnt work after winter.
  me: you know, these are on an incline where mud and debris can flow into them, have they been cleaned out?
  him: no, I dont think so.
  me: why dont you clean them out and then see if anything works....
  him: OK, I'll let you know.
   
  So, could be that the cavities in the cement are filled with...stuff. I hope so but at least but it buys me some time that I don't have to take a day to go and find it was that simple....

       
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