TM 10-6640-239-13 4-125 4-54.    GFI INDICATING SWITCHES. This task consists of: a. Remove b. Install INITIAL SET-UP Tools Required General Mechanics Tool Kit, (Appendix B, Section III, Item 1) General Safety Instructions WARNING ELECTRICAL SHOCK Before performing any  maintenance actions on electrical equipment, ensure  all electrical power has been turned off.  Failure to comply with this warning may result in serious injury or death. REMOVE Remove GFI Indicating Switches.  See Figure 4-48. a. Turn circuit breaker A15CB11 OFF in Power Panel No. 2. b. Remove eight screws (1), two covers (2), cover (3), and extender (4) form mounting plate (5). c. Remove two screws (6) and six washers (7) and pull switch (8) forward from mounting plate (5). d. Remove insulating cover (9) from switch (8). e. Tag and disconnect electrical leads by removing two screws (10). f. Remove switch (8). g. Remove indicating light (11) by unscrewing from socket (12). h. Remove two screws (13). i. Tag and disconnect electrical leads by removing screws (14). j. Remove socket (12). INSTALL Install GFI Indicating Switches.  See Figure 4-48. a. Install socket (12) and secure with two screws (13). b. Connect electrical leads as tagged and secure with screws (14).  Remove tags. c. Install indicating light (11). d. Connect electrical leads as tagged and secure with screws (10).  Remove tags. e. Install insulating cover (9) around switch (8). f. Install switch (8) and secure with two screws (6) and six washers (7). g. Install extender (4), cover (3) two covers (2) and secure to mounting plate (5) with eight screws (1). h. Verify operation of GFI indicating switches.