c.
d.
TM 5-6115-629-14&P
With first probe still in contact A, touch remaining probe to wires labeled L2, L3, L0, and
GEN GND. Multimeter must not indicate continuity. If it does, cable is shorted.
Refer to figure 4-13, and repeat steps b. and c. at connector contacts B, C, and N. In each
case, continuity must exist between corresponding points and only between corresponding
points.
Figure 4-13. Power Cable Wiring Diagram.
e. Connect one multimeter probe to GEN GND lug on cable and touch remaining probe to G1,
G2, G3, and G4. Continuity must be indicated on each contact.
f. If continuity test detects any opens or shorts in cable, refer cable to higher level of
maintenance.
4-28.
Switch Box Testing. The power plant switch box assembly is tested by performing a series of
continuity checks on the component parts and internal wiring.
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. Switch Testing. The switch box contains two three-pole, single-throw switches. Testing
procedures are typical for both.
WARNING
To avoid risk of injury or death by electrocution, do not remove switch box
access cover while either power unit is still connected to switch box.
(1) Remove 14 screws, 14 Iockwashers, and 14 flat washers securing access cover to switch
box and remove cover.
(2) Set multimeter controls to prepare unit for continuity testing.
(3) Set switch being tested to ON position.
4-28
