title: GTM eCommerce tracking
body: <p>I would like to start tracking e-commerce with Google Analytics, to do this I need to pass the values of my data layer into GA using GTM. I have read endless amounts of documentation on the subject and as far as I can tell it should work, however I am still having problems.</p>
  
  <p>The online store we use is actually a third party system (quote engine) so we can't change what is passed to the dataLayer, everything we need is passed to the dataLayer but I can't figure out how to send this data using GTM to GA.</p>
  
  <p>My data layer looks something like this on the checkout page of the site:</p>
  
  <p>dataLayer = [{</p>
  
  <pre><code>'u12': '18000011', 'u10': '31903296', 'u11': '159328761', 'u3': 'XXLX', 'u7': '58.97'
  
  }];
  </code></pre>
  
  <p>The custom HTML tag in GTM I'm using is firing in the correct place but not sending the information to GA, the tag looks like this:</p>
  
  <pre><code>&lt;script&gt;
  
  ga('require', 'ecommerce', 'ecommerce.js');
  
  ga('ecommerce:addTransaction', {
  id: '{{u12}}',
  revenue: '{{u7}}'
  });
  
  ga('ecommerce:addItem', {
  sku: '{{u12}}',
  name: '{{u3}}',
  price: '{{u7}}', 
  quantity: '1'
  }); 
  
  ga('ecommerce:send');
  </code></pre>
  
  <p></p>
  
  <p>Unfortunately this is not working and my Google Analytics is empty in terms of e-commerce transactions, any help on this would be greatly appreciated.</p>