APU Harness Plug, Terminal D, Lead 487.
APU Control Box Lead 487, Terminal A.
If voltage was indicated during this test, proceed to the next required test
Set the MASTER switch to the OFF position.
Conduct an APU
control box continuity as shown on the chart (Figure 24). If the
multimeter does not indicate the prescribed readings shown in
column 3 and 4 of the test chart, then a check of each circuit