Import-Module FailoverClusters; 

#Show Nodeweights
Get-ClusterNode -Name SQL2K12-SVR1 | select Name, NodeWeight;
Get-ClusterNode -Name SQL2K12-SVR2 | select Name, NodeWeight;
Get-ClusterNode -Name SQL2K12-SVR3 | select Name, NodeWeight;
Get-ClusterNode -Name SQL2K12-SVR4 | select Name, NodeWeight;

#Adjust Nodeweight on 4 to remove voting
(Get-ClusterNode -Name SQL2K12-SVR4).NodeWeight = 0;

#Show Nodeweights
Get-ClusterNode -Name SQL2K12-SVR1 | select Name, NodeWeight;
Get-ClusterNode -Name SQL2K12-SVR2 | select Name, NodeWeight;
Get-ClusterNode -Name SQL2K12-SVR3 | select Name, NodeWeight;
Get-ClusterNode -Name SQL2K12-SVR4 | select Name, NodeWeight;