I just bought a 94 GT and it came with the factory alarm. From what the previous owner said it still works but he disconnected the siren because it kept going off. The reason why it kept going off is because the remote fob stopped working. Everything is still connected and in tact. My question is if i want to get the alarm working do i need to install a new alarm? or can i just program a remote and swap out the brain? What can i do?