TM 9-2320-361-20 4-30. HORN BUTTON REPLACEMENT This task covers: a. Removal b. Installation INITIAL SETUP: APPLICABLE MODELS REFERENCES (TM) All TM 9-2320-361-10 MATERIALS/PARTS TM 9-2320-361-20P O-ring EQUIPMENT CONDITION Safety wire (Appendix C, Item 22) Parking brake set (TM 9-2320-361-10). Battery ground cable disconnected (para. 4-48). a. Removal 1. Remove three screws (4) and lift horn button adapter (3) from top of steering wheel (1). Disconnect horn button connector (7) from wire connector (10). 2. Remove spring (9) and seal (2). 3. Remove retaining ring (6), horn button (5), and O-ring (8) from adapter (3). Discard O-ring (8). NOTE Perform steps 4 through 8 only if horn wire is damaged. 4. Disconnect plug (16) from connector (15) and slide shell (14) back on horn wire (12). 5. Remove slotted washer (18) from behind connector (15) and slide shell (14) off end of wire (12). 6. Remove rubber bushing (13) from steering gearbox (19) and slide offend of wire (12). NOTE Safety wire must be long enough to reach from other end of steering column plus two additional feet. 7. Attach safety wire (17) to horn wire (12). NOTE Safety wire must be left inside steering column. It will be used to pull new horn wire through steering column. 8. Pull horn wire (12) through steering column (11). Leave safety wire (17) in steering column (11). b. Installation 1. 2. 3. 4. 5. 6. 7. 8. 4-46 NOTE If horn wire has not been removed, proceed to step 6. Pull horn wire (12) through steering column (11). Make sure horn wire (12) is taut between steering column (11) and connector (15). Discard safety wire (17). Install rubber bushing (13) on horn wire (12) and into hole in steering gearbox (19). Move shell (14) upward on wire (12) and install slotted washer (18) behind connector (15). Slide shell (14) over slotted washer (18). Connect plug (16) to connector (15). Install spring (9) and seal (2) in steering column (11). Install retaining ring (6), horn button (5), and new O-ring (8) in adapter (3). Connect wire connector (10) to horn button connector (7). Install horn adapter (3) in steering column (11) and steering wheel (1) with three screws (4).