Only the drivers seat came with the lumbar support from the factory.....although some people have added it to the passenger side too. If you're not hearing anything when you push the buttons then it could be a bad pump/motor. I would also look at the bladders when you take the seats apart.....they have a tendency to rip, tear or just crumble with age. Hopefully it's just an electrical connection. Have you checked for a blown fuse?