Macro Firing Cell Change

EE Pros,

Happy holidays!  

I have a Macro that fires when a change is made to cell B1 (in WS2).  I have modified the Workbook so that I have a Worksheet that has the change I want to make to B1 on a different sheet (Sheet1, Cell D5).  When I input the text into cell D5, I want it to reflect the change in cell B1 and have the macro fire.  Unfortunately, as you may see with the code below, I have to reinter the same data into B1 (WS2).  In otherwords, I need the simple fix of how to reflect a change in Sheet1, Cell D5 into cell B1; then have the Macro fire.

That's it!

Thank you in advance,

B.



Private Sub Worksheet_Change(ByVal Target As Range)
    On Error GoTo Err
   
    Dim rgWidth As Range, rgInitialize As Range, targ As Range
    Dim rng1 As Range, rng2 As Range
    Dim rng1LastRow As Long, rng2LastRow As Long
   
    Application.EnableEvents = False
    Application.ScreenUpdating = False


    'Watch this cell for changes
    Set targ = Range("B1")
    'Reinitialize these cells if the watched cell changes
    Set rgInitialize = Union(Range("A3:A50"), Range("C3:C50"))
    'Change the column width of these cells as data changes
    Set rgWidth = Union(Range("B3:B50"), Range("D3:D50"))
    rgWidth.EntireColumn.AutoFit
    If Intersect(targ, Target) Is Nothing Then Exit Sub
   
   
    rgInitialize.ClearContents
    rng1LastRow = Range("B" & Rows.Count).End(xlUp).Row
    rng2LastRow = Range("D" & Rows.Count).End(xlUp).Row
       
    Set rng1 = Range("B1:B" & rng1LastRow)
    Set rng2 = Range("D1:D" & rng2LastRow)
   
    If Not Intersect(Target, rng1) Is Nothing Then
        With Range("A" & Target.Row).Validation
            .Delete
            If Len(Trim(Target.Value)) <> 0 Then
                .Add Type:=xlValidateList, AlertStyle:=xlValidAlertStop, Operator:= _
                xlBetween, Formula1:="H,M,L"
            End If
        End With
    ElseIf Not Intersect(Target, rng2) Is Nothing Then
        With Range("C" & Target.Row).Validation
            .Delete
            If Len(Trim(Target.Value)) <> 0 Then
                .Add Type:=xlValidateList, AlertStyle:=xlValidAlertStop, Operator:= _
                xlBetween, Formula1:="H,M,L"
            End If
        End With
    End If
Sidz:
    Application.ScreenUpdating = True
    Application.EnableEvents = True
    Exit Sub
Err:
    MsgBox Err.Description
    GoTo Sidz
End Sub