When disconnected, my battery will sit at around 12.8 volts. I tested the current draw by disconnecting negative terminal and then using the multimeter in series. It read -1.8 amps, which is a ton. I also tested the voltage after immediately turning off the car. The voltage drops quickly from 14 volts to 10.5 volts within 30 seconds, you can watch the numbers fall.
What could cause a draw this large?
Reconnect the multi meter and pull one fuse at a time. When you see the big reduction in current you are on the right track. I think but am not sure normal draw should be under 100ma. It depends on the car and how it is equipped.