My 2000 300 Cat keeps draining the battery when the key is off. Over a course of three hours it will completely drain it. First I replaced my battery, then i noticed the back of the voltage regulator was fried so I figured that was my problem. I replaced it only to find it didn't fix the problem. I can't find any bare wires anywhere. I'm about to pull my hair out. Does anyone have the tests to test the regulator and stator?

 

Try checking the wire that comes out of the engine from the stator. I have read of it rubbing through and causing some ecectrical issues.

SJ