How to disable and enable cameras?

Unity Engine
1

I created cameras that act as rear-view mirrors on cars. If my game has two or more cars, how do I disable cameras on one car and enable cameras on another car when switching from one car to other? The cameras are in:

Bus folder (prefab)
    Mirror Cameras (Empty GameObject)
        Mirror-LCam (camera)
        Mirror-RCam (camera)

I’m using Edy’s Vehicle Physics as an example.

2

One thing you could try is changing the depth of the cameras depending on which car you wish to focus on.

If you are unsure what I mean by camera depth, you should be able to find some information in the unity manual.

3 
function SwitchCar (iDir : int)
	{
	if (Cars.length < 2) return;
	
	// Desactivar coche previo
	
	DisableCar(Cars[m_currentCar]);
		
	// Seleccionar coche nuevo
	
	m_currentCar += Mathf.Sign(iDir);
	if (m_currentCar < 0) m_currentCar = Cars.length-1;
	else if (m_currentCar >= Cars.length) m_currentCar = 0;
	
	SelectCar(Cars[m_currentCar]);
	}
	
	
// Desactivar el coche dado. No depende de variables globales.
	
function DisableCar(Car : CarControl)
	{
	// Desactivar elementos visuales
	
	var CarCams : CarCameras = Car.GetComponent(CarCameras) as CarCameras;
	CarCams.showFixedCams = false;
	
	// Desactivar otros elementos del coche
	
	Car.motorInput = 0.0;
	Car.brakeInput = 1.0;
	}

	
// Selecciona el coche dado. Lo activa y obtiene sus componentes.

function SelectCar(Car : CarControl)
	{
	// El coche seleccionado anteriormente será el secundario.
	// Obtener los objetos controlados del vehiculo: control, GUI, settings
		
	if (m_Car)
		{
		MainCamera.Target2 = m_CarCameras.CameraLookAtPoint;
		m_SecondaryCar = m_Car;		
		}
	
	m_Car = Car;	
	m_CarSettings = m_Car.GetComponent(CarSettings) as CarSettings;
	m_CarCameras = m_Car.GetComponent(CarCameras) as CarCameras;
	
	// Ajustar y activar elementos visuales
	
	MainCamera.Target = m_Car.transform;
	m_CarCameras.showFixedCams = true;
	
	// Activar otros elementos
	
	if (m_CarTelemetry)
		m_CarTelemetry.Target = Car;
	}

How do I find the mirror cameras so that I can enable or disable them? I tried GameObject.GetComponent but I got error messages.