Originally Posted by waybomb

The test the brother was doing was with the car off, doors closed. Put a voltmeter in place of the fuse - if you have a battery voltage reading, you know the circuit has power and a ground. Some circuits are supposed to, some not. He probably pulled the fuses/wires on those circuits not supposed to be drawing voltage. He's on the right path. Get a schematic and keep going - you'll find the gremlin.