CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19
ELECTRICAL TROUBLESHOOTING-Continued
PASSIVE NIGHT VIEWER-Continued
WARNING
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.
D
Disconnect ground wire from vehicle. Place red lead
of multimeter in socket B and black lead on other end
of ground wire. Check for continuity. If continuity is
not present, repair/replace ground wire of switch panel
to gage panel and miscellaneous switches wiring
harness (see paragraph 6-55). If continuity is present,
notify Direct Support Maintenance.
E
Disconnect wire 999 from passive night viewer side of
passive NIGHT VIEWER switch. Place red lead of
multimeter on switch terminal and black lead to
ground. Turn MASTER and passive NIGHT VIEWER
switches on and check for voltage. Turn MASTER
and passive NIGHT VIEWER switches OFF. If
voltage is present, repair/replace wire 999 of switch
panel to gage panel and miscellaneous switches
wiring harness from passive night viewer to passive
night viewer switch (see paragraph 6-55). If voltage is
not present, go to step F.
F
Reconnect wire 999 to passive NIGHT VIEWER
switch. Disconnect wire 999 from main switch panel
side of passive NIGHT VIEWER switch. Place red
lead of multimeter in wire 999 and black lead to
ground. Turn MASTER switch on and check for
voltage. Turn MASTER switch OFF. If voltage is
present, replace passive NIGHT VIEWER switch (see
paragraph
6-15).
If
voltage
is
not
present,
troubleshoot dome light circuit.
2-248
