Hey, my buddy has an 03 Passat...we were trying to find out why his heated seat on the passenger side wasnt working and unplugged a small yellow harness, which made the air bag light come on, after shutting the car back off and plugging it back in it still came on, we disconected the negative terminal on the battery and left it for a few mins before hooking it back up to see the same thing, it still came on so my question is this...what can i do to fix it?

Thanks, Trent