TM 5-6115-628-14&P
(6) Touch one multimeter test probe to connector pin N. Touch remaining probe to switch box
load terminal L0. Multimeter must indicate continuity.
(7) Touch one multimeter test probe to connector pin G. Touch remaining probe to GROUND
TERMINAL stud on switch box. Multimeter must indicate continuity.
(8) If continuity test detects any opens or shorts, connector cable assembly is defective:
c. Wiring Test. (Refer to wiring diagrams, Figure 4-14.) The internal switch box wiring is tested
by performing a continuity check(s) on suspect wires or connections.
WARNING
To avoid risk of injury or death by electrocution, do not remove switch box rear
cover while either power unit is still connected to switch box.
NOTE
All internal switch box wiring is labeled for identification with reference
designations of its points of connection. If labeling has been removed, or is
illegible, tag wires for identification before removing them.
(1) Remove 18 screws, 18 Iockwashers, and 18 flat washers securing rear cover to switch
box and remove cover.
(2) Before testing wires, make sure there are no loose connections or broken terminals.
Tighten any loose connections and refer broken terminals to higher level of maintenance.
(3) Set multimeter controls to prepare unit for continuity testing.
(4) Refer to applicable wiring diagram in Figure 4-14, and test continuity of suspect wires
between origin and destination specified in diagram.
4-29.
Switch Box Repair. The power plant switch box assembly is repaired by replacing defective
components. Components authorized for replacement at unit level of maintenance include connector
cable assemblies, load terminals, and individual wires.
NOTE
All internal switch box wiring is labeled for identification with reference
designations of its points of connection. If labeling has been removed, or is
illegible, tag wires for identification before removing them.
a. Connector Replacement. (See figure 4-15.) A damaged or defective connector is replaced by
replacing the entire connector cable assembly.
WARNING
To avoid risk of injury or death by electrocution, do not remove switch box rear
cover while either power unit is still connected to switch box.
4-29
