Mode Control Buttons
WARNING: This page is about a different car, the 2001 Acura Integra, 2000 Acura Integra, and 1999 Acura Integra. However, it is still accessible from the selected car via links, so may be relevant.
These buttons control the direction of air flow. The indicator shows which button is controlling air flow. When a mode is selected, voltage is applied through dimming control circuit to the LED, which comes on, indicating the mode selected. A ground signal is provided to the mode control motor through that mode switch. The motor then runs until the mode door reaches the proper position.