CONTINUITY TEST CONTINUITY TEST (1)  Remove two screws and lens cover from       LH cab marker light base. (2)  Remove LH cab marker light lamp from       socket. (3)  Set multimeter to ohms. (4)  Check continuity through LH cab marker       light lamp and note reading on multimeter. (5)  If continuity is not present, replace LH cab       marker light lamp (para 7-31). 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.   (1)  Remove two screws and lens cover from         LH door marker light base.   (2)  Remove LH door marker light lamp from         socket.   (3)  Remove four screws from LH door marker         light. Change 1          2-548.1 TM 9-2320-365-20-1   (4)  Remove nut, lockwasher, terminal lug         TL130, and lockwasher from LH door         marker light base.  Discard         lockwashers.        (5)  Extend base and disconnect connector         P130 from marker light connector.   (6)  Remove gasket from LH door marker         light base.  Discard gasket.   (7)  Set multimeter to ohms.   (8)  Connect positive (+) probe of multimeter         to terminal lug TL130.   (9)  Connect negative (-) probe of multimeter         to ground and note reading on         multimeter. (10)  If continuity is not present, go to step 12         of this fault.