Add handler in runtime within a constructor VB.NET - vb.net

Question

REEDIT
I have reedited the question to be more understandable following the advices of #enigmativity in his comments.
This is an example of what I want to do in my program. I tried to make it as simple as I can, so I hope you can understand my question.
The problem is the following: I am trying to add handlers dynamically, because I have an object which needs to fire a handler when something happens on it, and I can create this objects dynamically in the program. Maybe following this example you could understand my problem.
If I have an object, for example, a car, with its own properties (doors, wheels, motor..), and something happen in the road, I want the handler BREAK fires, and in the BREAK function do whatever I need to make it break. Here is the example code of the class for this object:
Public Class Car
Public Property carName As String
Public Property wheels As Integer
Public Property motor As String
Public Property color As String
Public Property speed As Decimal
Private Event BreakCar()
Public Sub New()
End Sub
Public Sub New(ByVal name_ As String, ByVal wheels_ As Integer, motor As String, color As String, ByVal speed As Decimal)
carName = name_
wheels = wheels_
motor = motor_
color = color_
speed = speed_
End Sub
Public Sub Break()
Try
AddHandler BreakCar, AddressOf EmergencyBreak
RaiseEvent AutoMsg()
Catch ex As Exception
MsgBox("Error: " & ex.Message & ". Stacktrace: " & ex.StackTrace)
End Try
End Sub
Private Sub EmergencyBreak()
Try
MsgBox("Emergency Break")
Catch ex As Exception
MsgBox("Error: " & ex.Message & ". Stacktrace: " & ex.StackTrace)
End Try
End Sub
End Class
Also, in the main form I have something like this:
Public Class frmMain
...
Private Sub AddMe(ByVal name_ As String, ByVal wheels_ As Integer, ByVal motor_ As String, ByVal color_ As String, ByVal speed_ As Decimal, Byval initCoordinates_ as PointLatLng)
Try
unitsList.Add(New Car(name_, wheels_, motor_, color_, speed_))
Dim marker As GMapMarker
marker = New GMarkerGoogle(initCoordinates_, GMarkerGoogleType.orange_dot)
marker.ToolTipMode = MarkerTooltipMode.Always
marker.ToolTipText = name_
meOverlay.Markers.Add(marker)
Dim lvItem As ListViewItem
lvItem = lvUnits.Items.Add(name_)
lvItem.SubItems.Add(Math.Round(initCoordinates_.Lat, 4))
lvItem.SubItems.Add(Math.Round(initCoordinates_.Lng, 4))
Dim unit_ As Car = unitsList.FirstOrDefault(Function(x) x.carName = name_)
unit_.Break()
Dim tTemp_ As Thread = New Thread(Sub() CarMovement(unit_))
tTemp_.Name = name_
tTemp_.Priority = ThreadPriority.Normal
tTemp_.Start()
unitsThreadList.Add(tTemp_)
Catch ex As Exception
MsgBox("Error: " & ex.Message & ". Stacktrace: " & ex.StackTrace)
End Try
End Sub
...
End Class
With this, I am trying to add cars in the system, using a different thread to each one, and after adding the car to the system, start its handler to make it BREAK when some condition happens.
My problem is that the handler never fires, and I don't know the reasons because when something happens to the car X, the handler Break() must fires but it doesn't.
Am I doing something wrong? Maybe it is not possible to add handlers to each object created dynamically like this?
Thanks for any help!