TM 10-3930-669-20 WARNING Remove  all  jewelry  such  as  rings,  dog  tags,  bracelets,  etc.    If  jewelry  contacts  battery terminal,  a  direct  short  may  result  in  instant  heating  of  tools,  damage  to  equipment,  and injury or death to personnel. VOLTAGE TEST (1) Remove  instrument  panel  (Para  7- 8). (2) Set    multimeter    select    switch    to VOLTS DC. (3) Connect     positive     (+)     multimeter lead  to  engine  oil  pressure  gauge, terminal I. (4) Connect    negative    (-)    multimeter lead to a known good ground. (5) Set   MAIN   POWER   switch   to   ON position (TM 10-3930-669-10). (6) Set engine switch to ignition position (TM 10-3930-669-10). (a) If  there  are  not  22  to  24  vdc present, perform Steps (7) and (8)   below   and   repair   gauge wire 5 (see schematic Appendix F). (b) If    there    are    22    to    24    vdc present, lead wire 5 is OK. (7) Set engine switch to off position. (8) Set  MAIN  POWER  switch  to  OFF position. CONTINUITY TEST (1) Set    multimeter    select    switch    to OHMS. (2) Check   continuity   between   suspect gauge,   terminal   G   and   a   known good ground. (a) If  there  is  no  continuity,  repair gauge ground wire (see schematic Appendix F). (b) If   there   is   continuity,   gauge ground wire is OK. 2-63