It's probably best for a new question, So create a new thread
If
$Server = CLusterNode
that will show you if SQL is running on that node but there will be a better way to fully answer your question
https://blog.robsewell.com Its where I blog
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The Best PowerShell Module for the Modern SQL DBA https://dbatools.io
Data South West User Group http://sqlsouthwest.co.uk/[/url]