The multimeter measures resistance by applying a test current to a circuit and measuring the voltage drop across the circuit. Resistance is measured in ohms (Q). Resistance measurements must be made with the circuit power OFF to prevent damage to the meter and/or circuit.
The multimeter also allows continuity checking. Continuity distinguishes between an open and closed circuit. Continuity tests determine good or blown fuses, open or shorted conductors, switch operation, and circuit paths.
To perform a resistance or continuity test (figure 6-4):
1. Turn power to the circuit OFF.
2. Select resistance (Q) from the multimeter selector.
3. Plug the black test probe of the meter into the “Com” input jack. Plug the red test probe into the “Q” jack.
4. Connect the probe tips across the component or portion of the circuit for which you
want to determine resistance.
5. View the reading. Be sure to note the unit of measurement— ohms (Q), kilohms (kQ), or megaohms (mQ).
