TM 1-1520-238-T-6
9–459
9–203. PRI LT CIRCUIT BREAKER (CB14) – DOES NOT STAY CLOSED OR CONTINUITY
9–203
DOES NOT EXIST BETWEEN (A77): J4-H AND J1-9
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
One person to assist
References:
TM 1-1520-238-23
WARNING
Turn off power before detaching or
attaching wires and connectors. High
current 28 VDC or 115 VAC is present.
Failure to do so could result in death or
serious injury.
1. On pilot ELEC PWR panel, set BATT/EXT PWR
switch to EXT PWR.
Does PRI LT circuit breaker (CB14) stay
closed?
YES
Go to step 4.
NO
Go to step 2.
2. Open CB14. Set BATT/EXT PWR switch to OFF.
Check for short between (A77)J1-9 and ground.
Does short exist?
YES
Go to step 3.
NO
Go to paragraph 9–132 to
troubleshoot CPG edge-lights.
3. Detach wire ends at CB14-2. Check for short
between (A77)J1-9 and ground.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 9–199.
NO
Replace PRI LT circuit breaker
(CB14) (TM 1-1520-238-23).
4. Set BATT/EXT PWR switch to OFF. Check for
open between:
CB14-1 and CB7-C1,
CB14-2 and (A77)J1-9.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–199.
NO
Replace PRI LT circuit breaker
(CB14) (TM 1-1520-238-23).
END OF TASK
