
We are specifically looking at the passenger side right now because there is more into the wiring bundles than the driver side.
Under the non-powered passenger side seat you have the always yellow SRS/airbag connector. ANYTIME you are even considering removing this plug you MUST disconnect the battery ground and wait for 90 seconds per the Toyota factory FSM. This means even if you are removing the seat just to give the carpet a good cleaning, the battery gets disconnected.
The next up is the seatbelt/occupancy sensor harness. This connector is just bring together the seatbelt sensor wires and the occupancy computer wires to the truck harness on the floor.
The white plug ONLY on non-powered passenger seats is just a connector dummy plug. This is because the truck is pre-wired for power seats and if you don’t have passenger power seats then this whole plug goes nowhere. It just holds the power harness from the floor.
The occupancy sensor computer basically takes strain calculations from the load-cell array and send that’s info to the truck computer thru the seatbelt/occupancy sensor harness.
Above all those in the pick is the seatbelt connector. Depending on the year of your 4Runner this could be two or four wires.