CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
2-19 ELECTRICAL TROUBLESHOOTING-Continued
M239 SMOKE GRENADE LAUNCHER SYSTEM-Continued
Remove all jewelry such as rings, dog tags,
bracelets, etc. If jewelry contacts a metal
surface a direct short may result in instant
heating of tools, damage to equipment, and
injury or death to personnel.
Reconnect smoke grenade launcher system wiring
harness to FIRE SMOKE box assembly. Disconnect
cable assembly for M239 smoke grenade launcher, left
hand side discharger feed through from launcher
assembly. Place red lead of multimeter in socket A and
black lead to ground. Turn MASTER and ARM SMOKE
switches ON, push LEFT switch, and check for voltage.
Turn MASTER and ARM SMOKE switches OFF. Check
ground circuit for continuity by placing red lead of
multimeter in socket B and black lead to ground. If
voltage and continuity are present in all circuits, refer to
TM 9-1330-200-12. If voltage or continuity is not
present in any circuit, repair/replace cable assembly for
M239 smoke grenade launcher, right hand side
discharger feed through (see paragraph 6-104).