You need to disconnect the negative battery cable. Put your DMM in-series between the battery cable and battery post. Set your meter to read amperage-draw (most meters can only handle about 10 amps so don't turn on anything that draws a lot of power or you'll blow your meter's fuse or melt the meter down).
Close the doors, remove the underhood light if you have one, and note the reading. It should be under 100 mA (0.1 amps) as I recall. Now start pulling fuses till the draw (reading) goes down. If that doesnt work, disconnect the alternator to see if that drops the parasitic draw.
Things like glovebox doors, vanity mirror lights, trunk lights, etc are common issues that cause a draw.
Good luck.
Close the doors, remove the underhood light if you have one, and note the reading. It should be under 100 mA (0.1 amps) as I recall. Now start pulling fuses till the draw (reading) goes down. If that doesnt work, disconnect the alternator to see if that drops the parasitic draw.
Things like glovebox doors, vanity mirror lights, trunk lights, etc are common issues that cause a draw.
Good luck.