Mode Switch

Connect vacuum tester to Black hose of vacuum connector. Plug vacuum port at fresh/recirculated air button. Vacuum is present at Black hose in all mode positions. In panel position, vacuum should exist at Black and Yellow hoses. In panel/floor position, vacuum should exist at Black, Blue and Yellow hoses. In floor position, vacuum should exist at Black, Blue and Red hoses. In floor/defrost position, vacuum should exist at Black and Blue hoses. In defrost position, vacuum should exist only at Black hose.