TM 10-3930-669-20 7-18.  BRAKE SWITCH REPLACEMENT/ADJUSTMENT. This task covers: a.  Removal b.  Installation c.  Adjustment INITIAL SETUP Tools and Special Tools Tool Kit, General Mechanic's: Automotive (Item 1, Appendix B) Materials/Parts Cable Ties (Item 4, Appendix C) Tags, Identification ( Item 21, Appendix C) Equipment Condition Engine OFF (TM 10-3930-669-10) Parking brake applied (TM 10-3930-669-10) Wheels chocked (TM 10-3930-669-10) Cab door opened (TM 10-3930-669-10) Batteries disconnected (Para 7-48) a.  Removal NOTE Cut cable ties as required. (1) Remove  four  screws  (1)  from  instrument panel (2). (2) Remove  screw  (3)  and  washer  (4),  and raise    instrument    panel    (2)    from    dash frame (5). NOTE • Tag   and   mark   all   wires   prior   to removal. • Pull   steering   column   cover   up   to see brake switch. (3) Disconnect    two    wires    (6)    from    brake switch (7). (4) Loosen  nut  (8)  and  remove  brake  switch (7) from dash frame (5). 7-39