Need for uninstall sql server instance from existing cluster set up

Hi Gurus!

we have existing 2 node fail (Active passive) over clustering setup and one of the SqlServer instance got corrupted.
Now the requirement is to uninstall the sqlserver instance and re install it as a fresh instance.
Need help on

  • What should i check and save before going for uninstall corrupted sql server instance.
  • guide\Procedure to uninstall sqlserver instance from cluster
  • guide\Procedure to install sqlserver instance on cluster

Please help me to perform this activity as an urgent task.

Many thanks in advance!!