2.Resistance Testing: Resistance testing checks for damaged components or connections within a circuit by measuring its resistance (measured in ohms) using a multimeter set to measure resistance (Ohms ...

To test this, leave your multimeter on the ohms setting and measure the resistance between the switch pins. On a four-pin relay, these are typically labeled 87 and 30.

How to test a contactor by checking coil voltage, verifying continuity, and confirming contact movement using a multimeter. Ideal for motor control diagnostics.