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) Set    multimeter    select    switch    to VOLTS DC. (2) Connect     positive     (+)     multimeter lead to relay R8, terminal 30. (3) Connect     negative     (-)     multimeter lead to a known good ground. (4) Set   MAIN   POWER   switch   to   ON position (TM 10-3930-669-10). (5) Set engine switch to ignition position (TM 10-3930-669-10). (a) If  there  are  not  22  to  24  vdc present,    perform    Steps    (6) and (7) below and repair wire 29 to relay R8 (see schematic Appendix F). (b) If    there    are    22    to    24    vdc present, wire 29 to relay R8 is OK. (6) Set engine switch to off position. (7) Set  MAIN  POWER  switch  to  OFF position. 2-371