Continuity Check

Foreword
A circuit consists of the power supply. switch, relay, load, ground, etc.. There are various methods to check a circuit including an overall check. voltage check. short-circuit check and continuity check.

Continuity Check is briefly described as below

Continuity Check:

1. When the switch is in the OFF position, the self power test light should come on or the ohmmeter should read 0 Ohm only when the terminals 1 and 2 are interconnected.
2. When the switch is the ON position, the self power test light should come on or the ohmmeter should read 0 Ohm only when the terminals 3 and 4 are interconnected.