Ok, so on an old car you:

1) Put a multimeter set to milliamps on the battery (r-to-r, b-to-b).
2) If its drawing a bit of current pull fuses one at a time til the current drops off.

Right?

i should know this really being an electrician but i think an ammeter needs to be connected in series with the + of the battery to read the current going through.

yes in series.... youll blow it up if you put it accross the terminals

to measure amps you go in series

to measure volts you go in parallel


(fsh.... why won;t firefox spell checker work!!!)

how old a car?

Itll be the radio or alarm if it has one.