I have a Ford Ka 2011 grand prix. The warning lights come on with ignition and go off as they should. But i've noticed a glow on the seatbelt and airbag warning that doesn't go off, it stays half lit all the time. Doesn't make any warning noises go off, just glows. Tried checking wires under seat and disconnecting battery to no avail, anyone have an idea please?

I would have said under seat wiring but you already checked it. I've seen a fault like this once only and it was the wiring, it was intermittent fault. Taking the wiring joint apart and spraying with contact cleaner spray sorted it for about six months each time.