TM 10-3930-669-20 CONTINUITY TEST (1) Remove suspect lamp (Para 7-26). (2) Set multimeter select switch to OHMS. (3)  Check  continuity  between terminals of lamp. (a) If there is no continuity, replace lamp. (b)  If  there  is  continuity, lamp is OK. CONTINUITY TEST (1)  Remove  heater  housing  cover (Para 16-8). (2)  Set  multimeter  select  switch  to OHMS. (3)  Check  continuity  between  light socket   red   wire   terminal   and light connector, terminal 1. (a)    If    there    is    no    continuity, replace light lead. (b)  If  there  is  continuity,  go  to Step (4) below. (4)  Check  continuity  between  light socket  black  wire  terminal  and light connector, terminal 2. (a)    If    there    is    no    continuity, replace light lead. (b)  If  there  is  continuity,  repair wire 24 (see schematic Appendix F). (5) Install heater housing cover. (6) Install lamp (Para 7-26). 2-171