JLG Parts Steering Wheel Horn Button for use on Caterpillar Telehandler(Rough Terrain Forklift) Machines. This Horn Button is located in the center of the steering wheel and activates the machines horn alarm when depressed. Model Use: TH351, TH357, TH408, TH514, TL642, TL943, TL1055, TL1255. Please ensure proper model and serial break before parts purchase.