we just bought a second hand truck and it had a remote start already installed, but no manual. one remote beeps when you press the buttons, so you know it worked, and the other doesn't, but we'd like it to. there is no brand name on the key fob, but it says Model: TX60A, FCC ID: J5F-TX60A, IC: 1854A-TX60A. It also says Mute: (unlock) + (key) + (trunk), we've tried that combination in order as well as pressing all at the same time, hoping it would also unmute, with no success. any suggestions?