C With MASTER switch ON, disconnect wire 459B from MASTER switch(bottom plug). Place red mulitimeter lead in wire 459B, ground black lead andcheck for voltage. If voltage is present, replace MASTER switch (p 6-21).If no voltage, repair or replace wire 459B-400.DNOTETo trace circuit 459B-400, check wiring harnesses12268100 (p 6-68), 12260287 (p 6-84) and 12260298 (p6-89).Reconnect all wires and check wire 81 for breaks, cuts and corrodedterminals. Replace if neccesary (p 6-68). Disconnect wire 82 from masterrelay. Place red multimeter lead in master relay and ground black lead. Checkvoltage. If no voltage is present, replace master relay (p 6-45). If voltage ispresent repair or replace wire 82 (Appx F).2-65Change 4TM 9-2360-267-20
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