parasitic battery drain

ok, I know this is not really a concern for an older mopar with no accessories

but truthfully I am working on a later model car and it is draining the battery and I disconnected the battery on one terminal and put a test light between the post and cable end.....and I pulled fuses till the light went out and found it to be a dash light and accessory fuse.

problem is that im not convinced that it has a short even though the test light is on, I think it could be an older battery too.

so what I would like to do is measure how much of a parasitic load does it have exactly

so how do I measure the parasitic load with a millimeter?...I think it is connected in series between the battery post and terminal end .....but what to I put the settings on to accomplish this?

and what is a typical parasitic load for a car made in the mid 2000s ?