TM 9--2350--292--20--1
0152 00--2
GRENADE LAUNCHER FAILS TO OPERATE PROPERLY. SOME OR ALL
TUBES FAIL TO OPERATE. ALL OTHER SYSTEMS OPERATE PROPERLY --
CONTINUED
0152 00
C
Is continuity present?
CONTINUED FROM STEP B
no
yes
CONTINUED ON NEXT PAGE
1. Disconnect harness 4W108 from firing switch
assembly.
2. Place one multimeter lead on firing switch
assembly receptacle pin G and other lead to
ground. Check for continuity.
Repair or replace (TM 9--1055--642--20&P)
firing switch ground lead. Verify fault is cor-
rected.
D
Is continuity present?
no
yes
Place one multimeter lead on arming switch recep-
tacle pin C and other lead to ground. Check for
continuity.
Repair (WP 0290 00) or replace
(WP 0671 00) arming switch ground
lead. Verify fault is corrected.
E
Is 24 V dc present at both checks?
no
yes
1. Reconnect harness 4W108 to arming switch
assembly.
2. Turn MASTER switch and ARM SMOKE switch
ON (TM 9--2350--292--10).
3. Place multimeter red lead in harness 4W108
firing switch connector sockets C and F (one at
a time) while holding black lead to ground.
Check for voltage.
4. Turn MASTER switch and ARM SMOKE switch
OFF (TM 9--2350--292--10).
Repair (WP 0290 00) or replace
(WP 0674 00) harness 4W108.
Verify fault is corrected.
