Before performing resistance checks, what must be done?

To ensure accurate resistance measurements, it is crucial to remove voltage from the circuit before performing resistance checks. Voltage in the circuit can give false readings, as the presence of voltage will introduce current flow that can affect the resistance measurement. By eliminating voltage, you create an open circuit condition where the meter can accurately gauge the resistance without any interference caused by electrical energy.

While disconnecting the battery, checking for continuity, or calibrating the multimeter may have their importance in different contexts, the primary step necessary for accurate resistance checks specifically involves removing voltage from the circuit to prevent erroneous readings during the measurement process. This approach helps maintain safe measuring conditions and protects the equipment and user from potential damage or injury.