TM 10-6640-215-13 4-57. REMOVE/INSTALL GFI INDICATING SWITCHES. This task covers:   a. Removal b. Installation INITIAL SETUP: This task covers:  a.  Removal                      b.  Installation Tools Required General Mechanics Tool Kit, (Appendix B, Section III, Item 2) General Safety Instructions WARNING ELECTRICAL SHOCK Before performing any maintenance actions on electrical equipment, ensure all electrical power has been turned off.  Death or serious injury may occur from failure to do this. REMOVAL Remove GFI Indicating Switches.  See figure 4-57. a. Turn circuit breaker A15CB 11 OFF in Power Panel No.  2. b. Remove eight cover screws and remove cover. c. Remove two switch mounting screws. d. Remove insulating cover from switch. e. Remove terminal screws, tag for reconnection and disconnect electrical leads. f. Remove defective switch. g. Remove indicating light by unscrewing from socket. h. Remove two socket mounting screws. i. Remove terminal screws, tag electrical leads for reconnection and disconnect leads. j. Remove defective switch. 4-152