Multimeter can't measure current. Maybe broken?
Yes you probably blew the fuse. The low current fuse is typically 200mA, although 500mA is also common. Depends on the counts of the multimeter.

If the resistance is working fine, you can try testing the fuse with it. Fuses usually break right at the center, away from the end caps which dissipate heat. The center is thus the hottest. But low current fuses, or if the fuse wire had a kink in it... could break off center (usually at the solder joint behind the end cap due to soldering stress).

added: to test if multimeter is working:


Verify that voltage source is correct
Calculate and add a resistor in series (make sure that resistor can handle the power dissipation)
Short out multimeter fuse terminals
Connect multimeter and check current
Remove short from fuse terminals








simulate this circuit &ndash; Schematic created using CircuitLab