NOTE Change 1          2-781 TM 9-2320-365-20-1 VOLTAGE TEST   (1)  Lift cover on connector J130 intervehicular         24 VDC connector.   (2)  Set multimeter to volts DC.   (3)  Connect positive (+) probe of multimeter         to connector J130 socket A.   (4)  Connect negative (-) probe of multimeter         to ground.   (5)  Position main light switch to BO DRIVE         (TM 9-2320-365-10) and note reading         on multimeter.   (7)  Connect positive (+) probe of multimeter         to connector J130 socket C.   (8)  Connect negative (-) probe of multimeter         to ground and note reading on multimeter.   (9)  Connect positive (+) probe of multimeter         to connector J130 socket H. (10)  Connect negative (-) probe of multimeter         to ground and note reading on multimeter. (11)  If 24 VDC is not present, go to step 2         of this fault. (12)  If 24 VDC is present, troubleshoot         trailer electrical system per trailer         technical manual. (13)  Position main light switch to OFF         (TM 9-2320-365-10). Inspect connector pins/sockets for damage, corrosion, and serviceability.  Check that connector pins are not pushed back and are capable of making good contact. Use care when testing electrical connectors. Do not damage connector pins or sockets with multimeter probes.  Failure to comply may result in damage to equipment. CAUTION Remove rings, bracelets, watches, necklaces, and any other jewelry before working around vehicle.  Jewelry can catch on equipment and cause injury or short across electrical circuits and cause severe burns or electrical shock. WARNING