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 relay R4 (Para 7-33). (2) Set    multimeter    select    switch    to VOLTS DC. (3) Connect     positive     (+)     multimeter lead to relay R4, terminal 86 cavity. (4) Connect    negative    (-)    multimeter lead to a known good ground. (5) Start engine (TM 10-3930-669-10). (a) If  there  are  not  22  to  24  vdc present, perform Step (6) below  and  repair  wire  34  (see schematic Appendix F). (b) If    there    are    22    to    24    vdc present, wire 34 is OK. (6) Shut down engine. CONTINUITY TEST (1) Set    multimeter    select    switch    to OHMS. (2) Check  continuity  between  relay  R4, terminal   85   cavity   and   a   known good ground. (a) If there is no continuity, replace  relay  R4  ground  wire (See schematic Appendix F). (b) If  there  is  continuity,  relay  R4 ground wire is OK. 2-53