TM 5-6350-264-14&P-9NAVELEX EE 181-AA-OMI-100/E121 DZ-204T.O. 31S9-2FSS9-1-9Table 5-1. Troubleshooting Procedures - ContinuedTroubleProbable causeCorrective action3. (Cont)f.(Cont)b.If the multimeter indicates more than 0 ohms atany of the above points, inspect wiring for brokenor loose connections, inspect plugs for bent orbroken pins, and inspect conduit for poorconnections.g.Defectivea.Ensure that power switch S1 in Control Unit ispower trans-turned off. Slide inner enclosure part way out.former T1.Remove screws that secure switch bracket.Lower switch bracket to gain access to terminalon switch S3. Ensure that switch S3 is on. Setmultimeter to ohms. Connect meter leads toS3-1 and 2 (red wires). Note meter indication.Connect meter leads to S3-3 and 4 (black wires).Note meter indication.b.If meter indicates 0 ohms, inspect wiring for bro-ken or loose connections at the following points:fuse F1 to S3-4; S3-3 to T1; T1 to TB3-1 and 2;TB3-1 and 2 to P1-l and 2; battery red lead toS3-2; S3-1 to P1-19.c.If wiring connections are good, replace power trans-former.(1) To remove transformer, note length and con-nection points of transformer wires. Discon-nect wires. Remove transformer.(2) To install new transformer, cut transformerwires to proper length and install crimp lugs.Position transformer on inner enclosure andinstall mounting screws and washers. Con-nect transformer wires.h.Defectivea.Interrupt ac power from Control Unit. Set multi-battery.meter to dc volts. Connect positive meter leadto red battery terminal and negative meter leadto black battery terminal. Ensure that powerswitch S3 is set to POWER ON. Meter should in-dicate 26 vdc or more.5-24
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