TM 9-4120-403-14
Test
(1)
Set circuit breaker to OFF.
(2) Use multimeter set on lowest OHMS scale to check continuity between terminals A1 and A2, B1 and B2, and
auxiliary switch terminals C and NO. All contacts should be open. If there is continuity on any check, replace circuit
breaker.
(3)
Set reset bar to OFF, then set it to ON.
(4) Use a multimeter set on the lowest OHMS scale and repeat continuity checks between terminals A1 and A2,
B1 and B2, and auxiliary switch terminals C and NO. All contacts should be closed. If there is no continuity on any
check, replace circuit breaker.
Figure 4-30. Circuit Breaker (CB)
4-80
