diff --git a/packages/angular-cli/models/find-lazy-modules.ts b/packages/angular-cli/models/find-lazy-modules.ts
index cb838b6e6f83..37c04c2f637f 100644
--- a/packages/angular-cli/models/find-lazy-modules.ts
+++ b/packages/angular-cli/models/find-lazy-modules.ts
@@ -2,6 +2,7 @@ import * as fs from 'fs';
 import * as glob from 'glob';
 import * as path from 'path';
 import * as ts from 'typescript';
+const resolve = require('resolve');
 
 import {getSource, findNodes, getContentOfKeyLiteral} from '../utilities/ast-utils';
 
@@ -49,21 +50,26 @@ export function findLoadChildren(tsFilePath: string): string[] {
     }));
 }
 
-
 export function findLazyModules(projectRoot: any): {[key: string]: string} {
   const result: {[key: string]: string} = {};
   glob.sync(path.join(projectRoot, '/**/*.ts'))
     .forEach(tsPath => {
       findLoadChildren(tsPath).forEach(moduleName => {
-        let fileName = path.resolve(projectRoot, moduleName) + '.ts';
-        // If path is a relative path
-        if (moduleName.startsWith('.')) {
-          const tsPathInfo = path.parse(tsPath);
-          fileName = path.resolve(tsPathInfo.dir, moduleName) + '.ts';
-        }
+        let fileName = moduleName.startsWith('.')
+          ? path.resolve(path.dirname(tsPath), moduleName) + '.ts'
+          : path.resolve(projectRoot, moduleName) + '.ts';
+
         if (fs.existsSync(fileName)) {
           // Put the moduleName as relative to the main.ts.
           result[moduleName] = fileName;
+        } else {
+          try {
+            let res = resolve.sync(moduleName, { basedir: projectRoot });
+            if (res) {
+              result[moduleName] = res;
+            }
+          } catch (e) {
+          }
         }
       });
     });
diff --git a/tests/models/find-lazy-modules.spec.ts b/tests/models/find-lazy-modules.spec.ts
new file mode 100644
index 000000000000..75f80cffd32f
--- /dev/null
+++ b/tests/models/find-lazy-modules.spec.ts
@@ -0,0 +1,60 @@
+const mockFs = require('mock-fs');
+const expect = require('chai').expect;
+import * as path from 'path';
+import {findLoadChildren, findLazyModules}  from 'angular-cli/models/find-lazy-modules';
+
+describe('find-lazy-modules', () => {
+  beforeEach(() => {
+    let mockDrive = {
+      'node_modules/feature-module': {
+        'package.json': '{ "main": "index.js" }',
+        'index.js': ''
+      },
+      'src/app': {
+        'app.module.ts': `RouterModule.forRoot([
+          { path: 'relative', loadChildren: './feature-a/feature-a.module' },
+          { path: 'absolute', loadChildren: 'src/app/feature-b/feature-b.module' },
+          { path: 'module', loadChildren: 'feature-module' },
+          { path: 'module2', loadChildren: 'feature-module/index.js' },
+          { path: 'invalid', loadChildren: 'invalid' }
+        ]);`,
+        'feature-a': {
+          'feature-a.module.ts': ''
+        },
+        'feature-b': {
+          'feature-b.module.ts': ''
+        }
+      }
+    };
+    mockFs(mockDrive);
+  });
+  afterEach(() => {
+    mockFs.restore();
+  });
+
+  it('should find children', () => {
+    let children = findLoadChildren('src/app/app.module.ts');
+    expect(children.length).to.equal(5);
+    expect(children.sort()).to.deep.equal([
+      './feature-a/feature-a.module',
+      'feature-module',
+      'feature-module/index.js',
+      'invalid',
+      'src/app/feature-b/feature-b.module'
+    ]);
+  });
+
+  it('should find lazy modules', () => {
+    let modules = findLazyModules('.');
+    expect(modules).to.deep.equal({
+      './feature-a/feature-a.module':
+        path.join(__dirname, '../../src/app/feature-a/feature-a.module.ts'),
+      'src/app/feature-b/feature-b.module':
+        path.join(__dirname, '../../src/app/feature-b/feature-b.module.ts'),
+      'feature-module':
+        path.join(__dirname, '../../node_modules/feature-module/index.js'),
+      'feature-module/index.js':
+        path.join(__dirname, '../../node_modules/feature-module/index.js')
+    });
+  });
+});