Ibiza 6l Airbag light..

Hello guys..

I got my airbag light and VW said it was the yellow plug under the passengerseat. So i did cut the plug, and soldert it, but it's still there?
What can it be then?
The computer/tester said it was the plug under the passenger seat..
Shall i delete the fault/light with the tester, or do it got away when i turn on the igniton on?

"Sorry for the English"

THANKS!!

Or is there a fuse to the airbag??

Yes i removed the + from the battery. I will try to get tester on again, and we what the fault is now.