2-162TM 9-2350-267-20H Disconnect wire 19 from BO SELECTOR switch (p 6-21). Us-ing multimeter, place red lead to switch and black lead toground. If voltage is present wire 19 is defective. Notify Support Maintenance. If no voltage, go to step 1.ORIDisconnect wire 520 from BO SELECTOR switch. Usingmultimeter, place red lead in wire 520 and black lead to ground.If voltage is present, replace BO SELECTOR switch (p 6-21).If no voltage, go to step J.BO SELECTOR SWITCHTA310521
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