Where can i get an online diagram of the fuse box for a 1989 mercury grand marquis

not sure you can when l get an issue like this l often go to ford and ask to look through there manuals but this maybe to old for them to still have the manual you maybe able to suppliment a newer manual depending on the part you are looking for. you can get CDs off ebay as an option also or maybe a local mechanic with alldata would be kind enough to print you off what you need.