TM 9--2350--292--20--10152 00--2GRENADE LAUNCHER FAILS TO OPERATE PROPERLY. SOME OR ALLTUBES FAIL TO OPERATE. ALL OTHER SYSTEMS OPERATE PROPERLY --CONTINUED0152 00CIs continuity present?CONTINUED FROM STEP BnoyesCONTINUED ON NEXT PAGE1. Disconnect harness 4W108 from firing switchassembly.2. Place one multimeter lead on firing switchassembly receptacle pin G and other lead toground. Check for continuity.Repair or replace (TM 9--1055--642--20&P)firing switch ground lead. Verify fault is cor-rected.DIs continuity present?noyesPlace one multimeter lead on arming switch recep-tacle pin C and other lead to ground. Check forcontinuity.Repair (WP 0290 00) or replace(WP 0671 00) arming switch groundlead. Verify fault is corrected.EIs 24 V dc present at both checks?noyes1. Reconnect harness 4W108 to arming switchassembly.2. Turn MASTER switch and ARM SMOKE switchON (TM 9--2350--292--10).3. Place multimeter red lead in harness 4W108firing switch connector sockets C and F (one ata time) while holding black lead to ground.Check for voltage.4. Turn MASTER switch and ARM SMOKE switchOFF (TM 9--2350--292--10).Repair (WP 0290 00) or replace(WP 0674 00) harness 4W108.Verify fault is corrected.
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