Any suggestions would be great. Battery can be fully charged and if left hooked up its flat dead in 20 minutes. All interior lights are off headlights etc. Something major has to be drawing on this thing and I need suggestions. Have been told starter, alternator, but what could sucj that much juice that fast? The starter does stop cranking and makes a whirring noise if its cranking and starts to catch then didn't then u have to return the key to off wait for it to stop whirring then crank it again but I can't see that draining it. Also its not the battery it has been replaced and the old one did it too. If I check with a multimrter from disconnected hot wire to the positeve post with one leed on each I should read what if its not drawing anything? 12 v right? Anything over 12 is drawing from the battery right?