Tractor Repair: Kubota, poor connections, ground cable

Question
Help,
I went out this morning to get the old Kubota ready for spring. Wouldn't start. Put on battery charger, still wouldn't start.  Noticed a buzzing sound coming from under the dash when key was off. Removed dash and traced to a relay (timer).
Got a new one and replaced it, same exact results. Dash lights come on as normal when key is turned on. Glow plug   lights up when key is turned further. Then when turned to start all goes dark and nothing else, no clicking or anyting.  Back to off, this relay makes a buzzing noise.
Thanks
Rick

Answer
  Hello,

  Check the ground cable connection where it attaches to the tractor.  Make sure all battery terminals are clean and tight.  Make sure the connections on the starter are clean and tight.  Have the battery load tested.  Check for poor connections on back of key switch.

                      Good luck,

                           Arnie