I have a Fiesta TD 2001 and my battery continually drains overnight unless I disconnect the negative lead. I have had a new alternator, recon starter (tested today its fine), and I am on my second battery. If I leave it connected when I turn the key all the lights come on and the speedo needle goes round but no noise or cranking engine. My garage and a auto electrician can find no drain or fault. Can anyone help all help appreciated.