There 4 terminals under the air bag, and ea. 2 are mounted on the same piece of metal. ther supposed to be a connector between those two pairs of the terminals - my car was missing it. when i bought it , the horns worked well, then started to work only if pressed on one corner (rt. lower?)
My mechanic took it apart and cleaned the terminals - did not help.
Later hes partner saw the two ends on the above mentiones metal bases that looked like they were supposed to have a contacts on them. he made up a piece of wire w/ two connectors and connected the bases - no problems since then.

***My car did not front collision damage fixed - I have no idea why the wire was missing or maybe it was not supposed to be there at all.

*** If you decide to disconnect the air bag you'll need to reset the light after you re-connect the bag again.
to remove the airbag, you have to turn the steering wheel to rt. 90 degrees and on the back of the wheel there is a torx - you need a deep/long socket ~1 inch to remove the screw. then turn wheel th left 90 from normal position an dyou'll see another screw.