Table 3-1. Operator/Crew Troubleshooting
TEST OR INSPECTION
For corrective actions or malfunctions not listed in Table 3-1, notify unit maintenance.
Wherever the word lubricate appears, refer to Appendix I for specific lubrication instructions.
Malfunctions, tests or inspections and corrective actions are listed/indented according to heading at the top left of each
Make sure all electrical power is disconnected before performing any maintenance on the electri-
cal system. Serious injury or death may occur if safety precautions are not observed.
1. ALL LIGHTS FAIL TO LIGHT
Step 1. Check light switch on towing vehicle.
Place light switch on towing vehicle in proper mode of operation. If towing vehicle lamps
light but semitrailer lights do not, proceed to step 2.
Step 2. Check to see that intervehicular cable (1) is
properly plugged into receptacle.
If cable is not properly connected, reconnect cable.
If cable is properly connected, proceed to step 3.
Step 3. Inspect for dirty or corroded sockets (2) on intervehicular cable (1). Check for damaged
If pins or socket are dirty or corroded, clean pins, socket and plug.
If pins are damaged, notify unit maintenance.
Step 4. Check for good ground connection at intervehicular cable
receptacle. Have ground connection (1) tightened.
Step 5. Check lights again.
If they still do not light, notify unit maintenance.