A/C Blower Motor Speed Control

WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

The A/C blower motor speed control is located on the A/C evaporator housing.

The function of the A/C blower motor speed control is to convert low power signals from the dual electronic automatic temperature control module to a high current, variable ground feed for the blower motor.
Blower motor speed is infinitely variable and is controlled by the dual electronic automatic temperature control module software.
A delay function provides a gradual increase or decrease in blower motor speed under all conditions.
Controls the integral high blower relay which is engaged when maximum fan speed is selected.