After a stereo/amp install, I have intermittent clicking from the passenger area. I also removed the seats in the process, but I have a feeling it's a ground issue. The problem only arises when the vehicle is moving, and when nobody is in the passenger seat, only when it's empty or lightweight items sitting on it. Once there's enough weight to turn off the passenger airbag light, it goes away. The origin of the sound might be the blower motor, or a relay, but it's hard to tell since I have to be driving with no passenger for it to work! Worse on dirt roads.
Has anyone fixed, replaced, or bypassed their passenger seat occupant sensor?