TM 10-3930-669-20 7-46.  HORN BUTTON REPLACEMENT. This task covers: a.    Removal b.    Cleaning/Inspection c. Installation INITIAL SETUP Tools and Special Tools Tool Kit, General Mechanic's: Automotive (Item 1, Appendix B) Materials/Parts Detergent (Item 10, Appendix C) Rag, Wiping (Item 19, Appendix C) Solvent, Drycleaning (Item 20, Appendix C) Nut, Lock 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. (1) Remove horn button (1) from steering wheel hub (2) by gently prying horn button upward. (2) Disconnect wire connector (3) from horn button terminal (4). 7-102