TM 10-3930-669-20 7-45.  HORN REPLACEMENT. This task covers: a.    Removal b. Installation INITIAL SETUP Tools and Special Tools Tool Kit, General Mechanic's: Automotive (Item 1, Appendix B) Materials/Parts 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 floor plate removed (Para 15-12) Batteries disconnected (Para 7-48) a. Removal. NOTE Tag and mark all wires prior to removal. (1) Disconnect connector P16 (1) from horn connector (2). (2) Remove two nuts (3), washers (4), and horn (5) from engine hull (6). 7-100