TM 9-2330-227-14&P
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. ALL LIGHTS DO NOT WORK, EARLY M146 - CONTINUED
Step 12.
Continued
If multimeter reads no continuity, notify Direct Support Maintenance.
a. Remove front blackout switch (page 4-35). Using multimeter
Step 13.
set to read continuity, put red probe in contact on side with
just one contact. Put black probe in one of the contacts on
other side. Check reading on multimeter. Flip switch, and
check reading again.
b. Repeat step 13a, putting black probe in the other contact
on that side.
If multimeter reads no continuity in either step 13a or 13b,
Install front blackout switch (page 4-35). Repeat steps 13a and 13b
Step 14.
for rear blackout switch.
Using multimeter set to read continuity, put red probe on one end of
Step 15.
wire leading from rear blackout switch to far side of right rear light
(ground side) and black probe on other end.
If multimeter reads no continuity, notify Direct Support Maintenance.
Step 16.
leading from rear blackout switch to left main circuit breaker and
black probe on the other end.
If multimeter reads no continuity, notify Direct Support Maintenance.
5. ALL LIGHTS DO NOT WORK, LATE M146
Step 1.
Using multimeter set to read voltage, check power source to make sure
there is approximately 110-vac coming to the semitrailer.
If multimeter measurement is not approximately 110-vac,
troubleshoot power source.
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