TM-9-2320-365-20-1 LMTV Unit Maintenance Manual M1078 Series - Volume 1 Download
Page 861 of 1760
TM 9-2320-365-20-1 CAUTION 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. NOTE Inspect connector pins/sockets for damage, corrosion, and serviceability. Check that connector pins are not pushed back and are capable of making good contact. CONTINUITY TEST (1) Remove two screws and lens cover from LH cab top marker light base. (2) Remove LH cab top marker light lamp from socket. (3) Remove four screws from LH cab top marker light base. NOTE Do not let wires slip through hole into cab structure. If wires slip into cab structure, vehicle will need further disassembly to retrieve wires. (4) Remove nut, lockwasher, terminal lug TL27, and lockwasher from LH cab top marker light base. Discard lockwashers. (5) Extend base and disconnect marker light connector from connector P50. (6) Remove gasket from LH cab top marker light base. Discard gasket. (7) Set multimeter to ohms. (8) Connect positive (+) probe of multimeter to connector J3 socket 2. (9) Connect negative (-) probe of multimeter to terminal lug TL27 and note reading on multimeter. (10) If continuity is not present, repair wire 3097 from connector J3 socket 2 to splice E24 (para 2-40) or replace M1081 cab clearance and marker lights upper cable assembly (para 7-56). (11) If continuity is present, repair wire 1951 from connector J3 pin 1 to splice E23 (para 2-40) or replace M1081 cab clearance and marker lights upper cable assembly (para 7-56). (12) Install gasket on LH cab top marker light base. (13) Connect marker light connector to connector P50. (14) Install lockwasher, terminal lug TL27, lockwasher, and nut on back of LH cab top marker light base. Change 1 2-574.1 (15) Install LH cab top marker light base on vehicle with four screws. (16) Install LH cab top marker light lamp in socket. (17) Install lens cover on base with two screws. (18) Connect connector P3 to connector J3. CONTINUITY TEST (Cont)