$ctrl.init = function () {
  return $ctrl._service.getCarManufacturers().then(res => $ctrl.makers = res, err => console.log(err));
};

$ctrl.getModels = function (makerId) {
  return $ctrl._service.getCarModels(makerId).then(res => $ctrl.models = res, err => console.log(err));
};

$ctrl.getYears = function (makerId, modelId) {
  return $ctrl._service.getCarYears(makerId, modelId).then(res => $ctrl.years = res, err => console.log(err));
};