Also check seat belt buckle. it talks to the Airbag system and confirms that a rider is restrained. its a small switch that gets pressed in when you buckle. sometimes spilled drinks like coffee or pop gums it up. check the seat belt plug as well. also be careful with plugging and unplugging the yellow airbag plugs. there are capacitors in the airbag system cpu that store energy to set off the airbags even as the battery gets destroyed in an accident.