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 rear wiper switch (Para 7-19). (2) Set multimeter select switch to VOLTS DC. (3) Connect positive (+) multimeter lead to rear     wiper     switch,     lead     wire     37 terminal. (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   replace   lead   wire   37 (See Schematic Appendix F). (b)  If  there  are  22  to  24  vdc  present, lead wire 37 is OK. (7) Set engine switch to off position. (8)   Set   MAIN   POWER   switch   to   OFF position. 2-181