You didn't connect the current meter across the power supply rails did you?
You should never do that, the current meter should always go in series with the load you're measuring.
Connecting the meter across the power supply will just measure the short circuit current which will be very high and will probably blow the fuse inside the meter.
Using a potential divider is a bad idea because, apart from being inefficient, the output voltage will change as the current drawn by the load varies.