Try looking above the kick panel on the drivers side. It may have a black/ dark cover over it that needs to come off to expose the fuses. Mine doesn't come off easily so I have to pry gently on the side of the cover to get it off the fuse box.
On a 1996 Ford Aerostar : The fuse box is under the instrument panel , on the drivers side
See http://www.analogstereo.com/ford_aerostar_owners_manual.htm
Under the instrument panel on the driver side
Check your fuse it happen to me
which fuse triggers 1992 ford aerostar
On a 1997 Ford Aerostar : The fuse box is under the instrument panel , on the drivers side
On a 1996 Ford Windstar : Under the dash on the drivers side , not too far from the inside hood release
I don't know if this is exactly the same but as of July 19 , 2012 you can still view the ( 1996 ) Ford Aerostar owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides The fuse section starts on ( page 313 )
in the owners manual
The fuse diagram for my 1994 Ford Aerostar is located on pages 339 to 345 of the Owners Guide that came with the vehicle when we purchased it new.
On a 1997 Ford Aerostar : The fuse box is under the drivers side of the dash
It is not behind the panel it is up under the dash on the drivers side on the side wall it has a black cover over it and on the inside of the cover there should be spare fuses and a fuse puller tool