TM 9-2330-247-14&P
Table 4-2. Organizational Troubleshooting (Con't).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Install door assembly on light assembly. Disconnect chassis wiring harness connector at
Step 3.
inoperative lamp (note marker band number). Using multimeter set to read voltage, put red probe
on chassis wiring harness terminal and black probe to ground.
If multimeter measurement is approximately 24vdc, pull back light assembly shell. If terminal
is damaged, repair (para 4-26). If terminal is not damaged, replace light assembly
(para 4-23,4-24, or
4-25).
Step 4.
Connect chassis wiring harness connector to inoperative lamp (note marker band number). Pull the
connector for the inoperative lamp from the chassis wiring harness/intervehicular cable clip
assembly and disconnect. Using multimeter set to read voltage, put red probe on intervehicular
cable terminal and black probe to ground.
If multimeter measurement is 24 vdc, pull back light assembly shell. If terminal is damaged,
Disconnect intervehicular cable from towing vehicle. Using multimeter set for continuity, check
Step 5.
towing vehicle receptacle end of intervehicular cable. Place red probe on inoperative lamp contact
and black probe to intervehicular cable terminal.
If multimeter shows continuity, troubleshoot towing vehicle and put connector together.
If multimeter shows no continuity, pull back connector shell. If terminal is damaged, repair
DIM OR FLICKERING LIGHTS.
3.
Check ground wire of intervehicular cable.
If ground wire is loose, clean and tighten ground wire,
BRAKES
BRAKES WILL NOT RELEASE OR RELEASE SLOWLY
4.
Step 1.
Check towing vehicle brake system to ensure that it is operating correctly.
If brake system is not operating correctly, troubleshoot towing vehicle.
Step 2.
Couple trailer to towing vehicle (para 2-10). Have assistant apply then release towing vehicle
brakes. Relay valve should vent air through exhaust port when towing vehicle brakes are released.
If air is not vented from relay valve exhaust port when towing vehicle brakes are released,