finding a current leak
 

The battery on my BMW drains if not used for more than a week. I'm thinking of just putting a current transmitter between the battery and the plus cable. Then pulling fuses until I find the source of the leak.

Is there a better way to find a current leak?

If my cheap multimeter is correct, there is over 150mA leak from battery to ground. We searched all of the fuses, but none of the fuses removed stopped the current.