From the FSM:

The microprocessor continuously monitors all of the airbag system electrical circuits to determine the system readiness. If the ACM detects a monitored system fault, it sends messages to the instrument cluster over the CCD data bus to turn on the airbag indicator lamp.

A dealer can scan the airbag system using their DRB. Then you'll know what the problem is.

You risk damaging the system OR even having an airbag deploy. I sure don't want that happening especially while playing with some wires under the dash.