Blower Control Module
WARNING: This page is about a different car, the 1998 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
Blower speed is controlled by blower control module located behind right side of dash, near blower motor. This module processes Pulse Width Modulated (PWM) voltage signals from A/C-heater programmer. The voltage is then amplified by the blower control module to provide variable blower speed. In manual mode of blower motor control, 9 speeds are available.