CONTINUITY TEST   (1)  Remove four screws from LH cab 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.   (2)  Remove nut, lockwasher, terminal lug         TL133, and lockwasher from LH cab         marker light base.  Discard         lockwashers.   (3)  Extend base and disconnect connector         P129 from marker light connector.   (4)  Remove gasket from LH cab marker light         base.  Discard gasket.   (5)  Set multimeter to ohms.   (6)  Connect positive (+) probe of multimeter         to terminal lug TL130.   (7)  Connect negative (-) probe of multimeter         to terminal lug TL133 and note reading         on multimeter.   (8)  If continuity is not present, repair wire         3098 from terminal lug TL130 to terminal         lug TL133 (para 2-40) or replace LH door         and cab marker lights cable assembly         (para 7-54).   (9)  If continuity is present, replace LH door         marker light (para 7-31). (10)  Install gasket on LH cab marker light base. (11)  Connect marker light connector to         connector P129. (12)  Install lockwasher, terminal lug TL133,         lockwasher, and nut on back of LH cab         marker light base. (13)  Install LH cab marker light base on vehicle         with four screws. (14)  Install LH cab marker light lamp in socket. (15)  Install lens cover on base with two         screws. (16)  Install gasket on LH door marker light         base. (17)  Connect marker light connector to         connector P130. (18)  Install lockwasher, terminal lug TL130,         lockwasher, and nut on back of LH door         marker light base. (19)  Install LH door marker light base on vehicle         with four screws. (20)  Install LH door marker light lamp in socket. (21)  Install lens cover on base with two         screws. Change 1          2-549 TM 9-2320-365-20-1