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TM 9-4120-389-14
(4)
Set circuit breaker to ON position.
(5)
Use a multimeter set on the lowest OHMS scale and repeat continuity checks between
terminals Al and A2, B1 and B2, C1 and C2, and auxiliary switch terminals C and NO. All four contacts should
be closed. If there is no continuity on any check, replace circuit breaker.
c.
Removal
(1)
Remove four screws that secure cover to control module.
(2)
Tag and disconnect wire leads to circuit breakers.
(3)
Remove retainer clips and press out one pin and two spacers on three circuit breaker toggles.
(4)
Remove six screws and washers in circuit breaker.
(5)
Remove circuit breaker.
d.
Installation
(1)
Install replacement circuit breaker in housing.
NOTE
Verify that the OFF-ON designation of circuit breaker switches
correspond to OFF-ON designation of housing identification
plate.
(2)
Secure circuit breaker to housing with six screws and washers.
(3)
Install retainer clips, two spacers, and one pin in toggles.
(4)
See tags and wiring diagram. (FO-1) and reconnect wire leads. Remove tags.
(5)
Secure cover to control module with four screws.
Follow-on procedures:
1.
Install control module (See para. 4-38).
2.
Install junction box (See para. 4-46).
4-125
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