TM 9-6115-647-14&P
4-23.
PDU Wiring Harness Testing . (See figure 4-9). Continuity testing is used to detect faults in the PDU
wiring harnesses. When performing continuity tests, refer to the wiring diagram, figure 4-9, for wire routing
information.
WARNING
Make sure generator set is shut down before performing tests. Serious injury or
death by electrocution can result if tests are performed with power on.
NOTE
In order to perform the following tests, the PDU cover must be open.
a.
J1 Wiring Harness Testing. Wiring harness J1 runs from connector J1 to terminal board TB1,
contactor K1 and ground stud E1.
(1)
Set multimeter controls for continuity testing.
(2)
Touch one multimeter test probe to connector J1 contact A and touch remaining test probe to
K1 contact A2. Multimeter must indicate continuity If it doesn't, there is an open in connector
or wire.
(3)
Repeat step (2) for each remaining wire in harness. Refer to figure 4-9 for correct ongoing and
destination of each wire.
(4)
If an open is detected in wiring harness, replace wiring harness (paragraph 4-24) or notify
higher level of maintenance for repair.
b.
J6 Wiring Harness Testing. Wiring harness J6 runs from connector J6 to terminal board TB1.
(1)
Set multimeter controls for continuity testing.
(2)
Touch one multimeter test probe to connector J6 contact L and touch remaining test probe to
TB1 contact 2. Multimeter must indicate continuity If it doesn't, there is an open in connector
or wire.
(3)
Repeat step (2) for each remaining wire in harness. Refer to figure 4-9 for correct ongoing and
destination of each wire.
(4)
If an open is detected in wiring harness, replace wiring harness (paragraph 4-24) or notify
level of maintenance for repair.
c.
J10 Wiring Harness Testing. Wiring harness J10 runs from connector J10 to terminal board TB1,
contactor K2 and ground stud E1.
(1)
Set multimeter controls for continuity testing.
(2)
Touch one multimeter test probe to connector J10 contact A and touch remaining test probe to
K2 contact Al. Multimeter must indicate continuity If it doesn't, there is an open in connector or
wire.
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