TM 9-2330-356-14
Table 3-2. Operator/Crew Troubleshooting (Con`t).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ELECTRICAL SYSTEM (Con't)
3. DIM OR FLICKERING LIGHTS.
Check for dirty or corroded intervehicular cable plugs and receptacles.
Refer to Step 2 under Malfunction 2, ONE OR MORE LAMPS (BUT NOT ALL) WILL NOT
LIGHT.
BRAKES
4. BRAKES WILL NOT RELEASE.
Check if brake valve on towing vehicle is in applied position.
Step 1.
Move brake valve to the released position.
Step 2.
Check if shut-off valves are closed on towing vehicle.
Open valves.
Check if air hose couplings are improperly connected to semitrailer.
Step 3.
Remove couplings and reconnect properly.
Check for dented or cracked air lines in the Emergency Line.
Step 4.
If lines are damaged, notify unit maintenance.
Check if rear air reservoir tank drain valve is open (fig. 2-2).
Step 5.
If semitrailer is coupled to towing vehicle, close the drain valve.
M970 and M970A1 only. Make sure piping cabinet door is tightly shut.
Step 6.
NO BRAKES OR WEAK BRAKES.
5.
Check if shut-off valves are closed on towing vehicle.
Step 1.
Open valves.
Check if air hose couplings are improperly connected to semitrailer.
Step 2.
Remove couplings and reconnect properly.
Check for bent or dented air lines in the Service Line.
Step 3.
If lines are bent or dented, notify unit maintenance.
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