How do you find a fuse diagram for 1991 Mercury Grand Marquis?

IF IT'S NOT IN THE ONWERS MANUAL OR ON THE FUSE BOX COVER BUY A CHILTONS REPAIR BOOK AT CHECKERS OR AUTOZONE ETC......

see http://www.autozone.com/az/cds/en_us/0900823d/80/19/31/35/0900823d80193135/repairInfoPages.htm