Alternator Changed...Battery Still dies

Primitive but it works. I start by disconnecting the positive on the battery and hooking up a 12V test light between the battery + and the battery terminal. With everything shut off and doors closed the light should not be lite. Sometimes the bleed down is so small that you have to do this in the dark to see if the bulb is glowing at all. If it is, I have someone watch the bulb as I pull each fuse. if the bulb quits glowing that is the circuit with the short in it. If you pull all of them and it's still glowing then your problem is most likely in the charging system.

Jim