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3. Test Box Operation
The test box is useful and convenient in testing the generator set after repair or overhaul and also in
trouble shooting. To operate the test box, proceed as follows:
A. Open left, rear canopy doors and connect the test box plug connector (see 1-1; 3, Fig. 14) to the
test receptacle connector (Fig. 4).
B. Connect the test prods of a voltmeter at the test jacks (3 and 4, Fig. 3). Test jacks are color coded.
RED indicates POSITIVE. BLACK indicates NEGATIVE.
C. Locate the component or circuit to be tested in the DESCRIPTION column on the instruction plate
and set the selector switch (1, Fig. 3) to the number indicated opposite the description.
D. Note the normal voltage value and kind of current (AC or DC) to be expected at the position and
set voltmeter accordingly.
E. Comply with conditions indicated in CONDITIONS column for the particular test being performed.
F. Press the pushbutton switch (2) and observe voltage indicated by the voltmeter. Compare to nor-
mal voltage indicated in VOLTAGE column.
G. Release pushbutton switch.
H. Repeat steps A thru G for other test as required.
J. When test are completed, disconnect the test equipment and close canopy doors.
October 1/95 Revised
Test Box Operating Controls
Figure 3
OM-2031
1-3
Page 7
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