Place one probe at each end of the circuit or component you want to measure.

If your multimeter is manual ranging:

If your multimeter reads close to zero, the range is set too high for a good measurement. Turn the dial to a lower resistance range.

If you set the range too low, the multimeter simply reads 1 or OL, indicating that it is overloaded or out of range. This won't hurt the multimeter, but we need to set the dial to a higher range.