Disable seat belt alarm on 2006 Hyundai Sonata
 

I disabled the annoying chime that sounds when the the driver's seat
belt is unfastened. It required a T10 torx screwdriver to remove the 2
screws holding the cover on the seat belt buckle receptacle. There are
2 wires, one blue and one yellow, that are soldered onto a small piece
of circuit board held in place in the cover. There are 2 circuit
traces on the board and a sliding jumper. When the seat belt is
inserted, the jumper is pushed back to where it no longer shorts the
blue and yellow wires together. When the seat belt is unfastened, the
jumper slides forward and shorts the wires together. The annoying
warning chime sounds when the blue and yellow wires are shorted. All
you need to do is snip one of the wires with a set of dykes. There is
another pair of wires going to another sensor in the seat belt
receptacle. These are buried in the receptacle, unlike the blue and
yellow wires which are in the cover of the receptacle. They are
presumably utilized by the air bag system, and shouldn't be cut. The
blue and yellow wires in the cover only serve to provide the annoying
chime whenever you unfasten your seat belt and can be safely snipped.