TM 1-1520-238-T-6
9–236
Change 8
9–58.
ALL NAVIGATION LIGHTS – DO NOT LIGHT
9–58
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. Check for 28 VDC at P1-25.
Is voltage present?
YES
Go to step 2.
NO
Go to paragraph 9–220 to
troubleshoot circuit protection
system (dc essential bus 2 –
pilot station).
2. Check for 28 VDC at P100-B20.
Is voltage present?
YES
Go to step 3.
NO
Repair open wire between:
P100-B20 and P457-A15,
(A402)J22-A15 and
(A402)J1-25.
Go to paragraph 9–55.
3. Check for open between (A133)J1-B20 and
(A133)S2-2.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–55.
NO
Go to step 4.
4. With NAV Switch (A133)S2 set to DIM, check for
open between (A133)S2-2 and (A133)S2-1.
Does open exist?
YES
Replace NAV Switch (A133)S2
(TM 1-1520-238-23).
NO
Go to step 5.
5. With NAV Switch (A133)S2 set to BRT, check for
open between (A133)S2-2 and (A133)S2-3.
Does open exist?
YES
Replace NAV Switch (A133)S2
(TM 1-1520-238-23).
NO
Replace pilot EXT LT/INTR LT
panel (TM 1-1520-238-23).
END OF TASK
