TM 10-3930-660-20 8-41.  BACK-UP  ALARM  SWITCH   -  REPLACE/ADJUST  (Cont’d) 2. REMOVE BACK-UP ALARM SWITCH (9) FROM LEVER HOUSING (l). a. b. c. Remove cotter pin (10), and washer (11), which secure top end of back-up alarm switch (9). Discard cotter  pin  (10). Remove nut (12), lockwasher (13), washer  (14), switch  spacer  (15), capscrew (16), washer (17), and back-up alarm switch (9). Discard lockwasher (13). Tag and disconnect two electrical leads (18) connecting switch (9) to vehicle wiring harness (19). INSTALLATION 1. INSTALL BACK-UP ALARM SWITCH (9) ON LEVER HOUSING (l). a. b. c. Connect electrical leads (18) from switch (9) to vehicle wiring harness  (19). Position back-up alarm switch (9) and switch spacer (15) on lever housing  (l). Secure bottom end of switch (9) with washer (17), Capscrew (16), washer (14), new lockwasher (13), and nut (12). Secure top end of switch (9) with 2. washer  (11), and new cotter pin (10) . ADJUST BACK-UP ALARM SWITCH (9) AS DESCRIBED IN “ADJUSTMENT” SECTION, BELOW. 8-104