On the 97, the actuator is immediately to the right of the top of the gas pedal. Look for the blue and yellow vacuum lines that plug into it (facing towards the firewall).
The blue line should have vacuum on it whenever OFF or any option the includes FLOOR is selected. The yellow line should have vacuum on it whenever the selector is in OFF or FLOOR.
To gain full access to the vacuum motor, remove the black shroud that covers the plenum, the right instrument panel brace, and the floor duct.
If your original owner's manual is missing, download a soft copy from www.fleet.ford.com
under the MAINTENANCE tab.
1994 Taurus SHO 3.2/ATX - Gone
1989 Taurus SHO What a project! Retired at 249K.
1997 Ford F150 SC 5.4L - Gone
1998 Ford Contour Wifey's old daily driver, now mine.
2007 Mercury Mariner AWD - Wifey's newdaily driver