Auxiliary System
WARNING: This page is about a different car, the 1995 Ford Aerostar. However, it is still accessible from the selected car via links, so may be relevant.
Auxiliary unit blower motor is controlled by a 4-speed switch mounted on instrument panel. When switch is in REAR CTRL position, blower motor speed is controlled by 4-speed switch mounted on auxiliary unit. When front selector is in OFF position, rear unit is also off.