Circuit/System Description
WARNING: This page is about a different car, the 2008 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.
The body control module (BCM) supplies accessory voltage as required for the rear wiper motor and controls the RR WASH PCB relay in the underhood fuse block through the accessory voltage circuit from BCM harness connector X5 terminal 14.