TM 9-2330-297-14&P
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ALL LAMPS FAIL TO LIGHT - CONTINUED.
Step 3. Using multimeter, check that 12 volts are available at connector (1).
If voltage is available, proceed with step 4. If voltage is not available, proceed with step 5.
Step 4. Using multimeter, check that 12 volts are available at connector (2).
If no voltage is available, check harness assembly for damage If harness is not damaged, proceed
with step 5.
Step 5. Check for good ground at intervehicular cable connector on front of semitrailer. Using a multimeter, check
for continuity between contact D (24-volt connector) or contact 1 (12-volt connector) and any bare metal on
semitrailer chassis.
If no continuity or high resistance exists, remove connector and ground wire.
Clean ground wire and contact surface.
Reinstall ground wire and connector.
If continuity is not obtained, replace connector.
TA223112
4-12
