Blower Speed Control
WARNING: This page is about a different car, the 2005 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
Blower speed is controlled based on front blower switch settings.
When blower switch is turned, the blower motor starts and increases air flow volume each time the blower switch is turned clockwise, and decreases air flow volume each time the blower switch is turned counterclockwise.