Test white wire by touching one probe of multimeter to load terminal LO on generator set and touching
other probe to load terminal LO on switch box. Multimeter must indicate continuity between these points.
Repeat step (3) for black wire (between L1 on generator set and Al on switch), red wire (between L2 on
generator set and A2 on switch) and blue wire (between L3 on generator set and A3 on switch).
The green (ground) wire must also be tested. Disconnect wire from frame ground stud under generator
set control panel. Test for continuity between free end of wire and ground stud E1 on switch box.
If multimeter does not indicate continuity exists on each wire in the cable, replace power cable assembly
(paragraph 4-25, d.).
To test power cable assembly associated with GEN 2 switch position, perform steps (2) through (6)
substituting switch terminals B1, B2 and B3 for terminals A1, A2 and A3, as test points. Generator set
load terminal designations and wire color-coding is identical for both power cables.
Figure 4-7. Switch Box Schematic Diagram.
Switch Box Internal Wiring Test.
(1) Set multimeter for continuity testing.
(2) Test wires between switch terminals and load terminals by touching probes to each of the following pairs
of test points: L1 on switch to L1 load terminal, L2 to L2, and L3 to L3. If multimeter does not indicate
continuity between each pair of test points replace associated wire (paragraph 4-25, c.).