Blower Motor Control Module
WARNING: This page is about a different car, the 1996 Oldsmobile Cutlass Supreme and 1996 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Module receives commands from A/C control assembly, amplifies them, then varies blower motor speed. Command signals are based on blower and mode selections, set temperature, and difference between in-vehicle temperature and outside temperature.