TM 9-2350-256-20-1
0089 00
CORRECTIVE ACTION Continued
4.
Place a jumper wire from pin A to socket A. Place red lead of multimeter on pin B of M239 launcher
power switch box and black lead to ground. Turn MASTER and ARM SMOKE switches ON and
check for voltage. Place red lead of multimeter on pin D of ARM SMOKE box assembly and black
lead to ground and check for voltage. Turn MASTER and ARM SMOKE switches OFF. If voltage is
present on both pins, go to step 6. If voltage is not present on either pin, go to step 5.
5.
Reconnect smoke grenade launcher system wiring harness to M239 launcher power switch box.
Remove M239 launcher power switch box from mounting bracket (see WP 0442 00). Disconnect
connector from terminal 2 of ARM SMOKE switch. Place red lead of multimeter on wiring harness
and black lead to ground. Turn MASTER switch on and check for voltage. Turn MASTER switch OFF.
If voltage is not present, repair/replace wire in power switch box assembly for M239 smoke grenade
launcher assembly (see WP 0241 00). If voltage is present, replace ARM SMOKE switch (see WP
0442 00).
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