Ideas for diagnosing air bag light

[sfkjeld]

Any suggestions on where to start? I replaced the grommets under the air bag 6 months ago due to the horn going off. But it seemed to go ok, no light anyway. Until about a month ago when it went on. I had an issue a few years ago with the wiring harness under the drivers seat. It became partly disconnected. It’s connected now but it seems fragile. Can that effect the air bag light?

Just trying to figure out where to start.