TM 55-1730-229-12
AG 320A0-OMM-000
TO 35C2-3-473-1
TM 1730-12/1
Table 4-2. Organizational Troubleshooting (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
(continued)
9.
NOTE
Diodes and wiring associated with each indicator light are as
follows (see FO-9):
Wiring
Diode
Indicator
4DS1
4D4
C116B16
4D8
C104116
4DS2
4DS3
4D5
C114B16
4DS4
C113B16
4D6
4DS5
4D7
C112B16
C103F16 and
4DS6
4D1
C120A16
4D3
4DS7
C118C16
Refer to FO-9 and locate diode associated with indicator light. Test
Step 2.
diode as follows:
a.
Disconnect battery.
b.
Remove hydraulic module front panel assembly (2, figure
C.
Remove hydraulic electrical panel (paragraph 4-90). Discon-
nect lead containing diode from positive terminal on indica-
tor socket.
d.
Using an analog multimeter (AN/PSM4 or equivalent), on X1
scale, measure resistance from diode anode (multimeter
positive lead) to diode cathode (meter negative lead).
(Diode cathode is marked with black band.) If resistance is
greater than 1 ohm, replace diode, and perform operational
check.
e.
Set meter to X10,000 scale and measure resistance from diode
cathode (multimeter positive lead) to diode anode (meter
negative lead). If resistance is less than 10K ohm, replace
diode, and perform operational check.
If diode tests good, do step 3.
f.
4-35
