Table 4-2. Unit Troubleshooting

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TM-9-2330-380-14-P Semitrailer Van: Electronic Tactical 12-Ton 4-Wheel XM1063 (NSN 2330-01-224-9244) and M129A4 (NSN 2330-01-372-5642) Manual

ALL LIGHTS FAIL TO LIGHT

TM 9-2330-380-14&P

Table 4-2. Unit Troubleshooting

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ELECTRICALSYSTEM

WARNING

Make sure all electrical power is disconnected before performing any maintenance on the electrical

system. Serious injury or death may occur if safety precautions are not observed.

NOTE

The following procedures are applicable to the 12-volt and 24-volt electrical system.

1. ALL LIGHTS FAIL TO LIGHT

Step 1. Checklightswitchontowingvehicle.

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. Inspect for dirty or corroded terminals (1) in intervehicular cable receptacle (2) and

sockets (3) in plug (4).

If terminals or sockets are dirty or corroded, clean them.

If terminals or sockets are clean, proceed to step 3.

Step 3. Check to see that intervehicular cable is properly plugged

into 12-volt (1) or 24-volt (2) receptacle. In all steps, check

for good ground connection.

If cable is not properly connected, reconnect cable.

Ifgroundconnectionisloose,tightengroundconnection.

If cable is properly connected and ground connection is

tight, proceed to step 4.

XM1063 Shown

4-9