Passenger airbag light on not the usual SRS light , but the left hand baby carrier thing , and light is in with the airbag switched on or off . guess its a seat switch? or dirty connections. tried cleaning connections but still on so as i have just had a passenger in it after a long time of solo driving may be the switch showing load? how do these switches work? any info please, and yes battery disconnected for tests and er connections ! thanks for any help, MOT soon!