TM 9-2320-209-20-3-1 7-54. ELECTRIC HORN REMOVAL AND REPLACEMENT. TOOLS: 7/16-inch wrench SUPPLIES: Tags PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Preliminary Procedure. Disconnect battery ground cable. Refer to para 7-58. b. Removal. FRAME 1 1. 2. 3. 4. NOTE On trucks equipped with front winch, horn is mounted below headlamp. Using 7/16-inch wrench, unscrew and take off two screws and washers (1). Take horn assembly (2) far enough out of cutout in panel (3) to take off plugs (4 and 5). NOTE Tag electrical plugs before taking them off to be sure they are put back in the right place. Take electrical plugs (4 and 5) off horn assembly (2). Take away horn assembly (2). END OF TASK 7-202