Table 3-1. Operator/Crew Troubleshooting (Con't).
TEST OR INSPECTION
Check for proper ground connections at light assemblies.
Tighten ground connections as required.
2 . ALL CHASSIS LIGHTS ARE ON BUT VAN CLEARANCE LIGHTS ARE OFF.
Check for loose 24-volt connection at receptacle.
Remove, clean, and insert plug, ensuring that proper connection is made.
DIRECTIONAL SIGNALS INOPERATIVE...
Check for dirty or corroded cable socket and contacts.
Notify Organizational Maintenance.
ONE OR MORE 24-VOLT LAMPS (BUT NOT ALL) FAIL TO LIGHT.
Check for loose plug connectors at affected light assemblies.
Connect loose plug connector.
Check for dirty or corroded terminals on intervehicular cable.
Clean connectors, receptacle, and plug.
Check to see if rear junction connector is loose if van and forward chassis lights are ON, but all rear
lights are OFF.
Remove and install connector, ensuring that socket and contacts are clean.
ALL 11O-VOLT LAMPS FAIL TO LIGHT.
Check power cable connection.
BRAKES DO NOT ENGAGE..
Check intervehicular air hoses for proper connections.
Check for closed air valve on towing vehicle.
Open air valve. Refer to towing vehicle technical manual for instructions.