TM 1-1520-238-T-4
6–82.6
Change 5
6–18.
HOD NGB 2 READING – DISPLAYS 0 LB OIL PRESSURE
6–18
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
References:
TM 1-1520-238-23
TM 55-1500-323-24
TM 9-1230-476-20-2
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions –
R200 access panel and
RN6, R60 fairings open.
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.
NOTE
If OIL PSI NOSE GRBX 2 indicator is also
illuminated, troubleshoot Task 6–18.3
before proceeding.
1. Detach P60. Check for open between:
P60–L and P60–M,
P60–L and P60–P,
P60–L and P60–R.
Does open exist?
YES
Go to step 3.
NO
Go to step 2.
2. Check for short between:
P60–L and ground,
P60–M and ground,
P60–P and ground,
P60–R and ground.
Does short exist?
YES
Go to step 3.
NO
Go to step 4.
3. Locate open or short in wire harness between
P60 and MT12.
Can wire harness be repaired?
YES
Repair wiring harness
(TM 55-1500-323-24.
Go to paragraph 6–13.
NO
Replace MT12.
Go to paragraph 6–13.
4. Reconnect P60. Detach P672. Check for open
between:
P672–85 and P672–84,
P672–85 and P672–99,
P672–85 and P672–100.
Does open exist?
YES
Repair open wire between:
P672–85 and J524–A7,
P672–84 and J524–A8,
P672–99 and J524–A10,
P672–100 and J524–A11,
P524–A7 and J60–L,
P524–A8 and J60–M,
P524–A10 and J60–P,
P524–A11 and J60–R.
Go to paragraph 6–13.
NO
Go to step 5.
