A/C Switch
WARNING: This page is about a different car, the 1998 Acura Integra. However, it is still accessible from the selected car via links, so may be relevant.
Remove heater control panel. Disconnect 14-pin connector. With A/C switch on, check for continuity between terminals No. 11 and No. 12 of 14-pin connector. See Fig 1 . There should be current flow in only one direction.