I don't think there's a second light for the passenger but according to the manual the same light for the driver should be going off if you aren't buckled up.See my delima is quite the oppisite of this. my truck isnt telling me when im buckled up as a passenger or not so im unsure if the airbag is working on that side. i clearly exceede the weight requirement for it to notice me sitting and therefore buckled and the drivers side chimes when im driving but if im passenger, nothing...no chimes no lights or anything. is there a second light for passenger airbag? and should it be going off whence im sittin there?