I have a 2004 Ford F-350 6.0 powerstroke 4x4 6-speed manual. My problem is something is drawing every volt there is in the battery. I have ruled out starter and charging system. I just don't know where to start. Any help would be appreciated.

 

meter to the battery and start pulling fuses

 

Watch this short video.
this will at least get you going in the right direction in finding your short!

 

Have you had a sound system or amp installed recently ???