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 parking  brake  interlock  switch,  terminal COMMON. (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 wire 10 to interlock switch (see schematic Appendix F) (b)   If  there  are  22  to  24  vdc  present, wire 10 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 parking brake interlock    switch,    terminals    COMMON and NORM CLOSE. (a)   If   there   is   no   continuity,   replace interlock switch (Para 11-2). (b)   If  there  is  continuity,  repair  wire  1 OA to interlock switch (see schematic Appendix F). (3)   Install instrument panel (Para 7-8). 2-261