I kind of skipped through all of the posts and suggestions but I have a question for the OP. In your first post you state it's a new battery, did you have this battery draining issue before you put a new battery in? What if it's a bad (new) battery? Just saying.
While it is true that we have recently seen batteries that show 12v on a voltmeter but crap out under load, only to return to 12V, the test light draw test is not a battery. There is current flowing somewhere that it shouldn't be.
