Circuit/System Description
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
The folding top control module monitors a hall-effect switch for the stowage compartment lid: The folding top stowage compartment lid open position sensor. The switch monitors the status of the stowage compartment lid.
The sensor is a two-wire hall effect sensor providing an input to the folding top control module. One circuit is low reference and the other is a signal circuit.