'Return True if the binary sensor is on.'

@property
def is_on(self):

    val = getattr(self.vehicle, self._attribute)
    if (self._attribute == 'bulb_failures'):
        return bool(val)
    elif (self._attribute in ['doors', 'windows']):
        return any([val[key] for key in val if ('Open' in key)])
    return (val != 'Normal')
