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. · Drive   axle   and   oil   retains   extreme   heat.      Use   extreme   caution   when   checking components near drive axle.  Failure to do so will result in severe bums to personnel. VOLTAGE TEST (1) Set    multimeter    select    switch    to VOLTS DC. (2) Connect     positive     (+)     multimeter lead  to  axle  oil  temperature  switch input terminal. (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 axle switch (see schematic Appendix F). (b) If    there    are    22    to    24    vdc present, wire 29 to axle switch is OK. (6) Set engine switch to off position. (7) Set  MAIN  POWER  switch  to  OFF position. 2-375

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