87's don't have such connections. Not familiar enough to know if there is any kind of diagnostic port, but if there is, it will just flash the check engine light with a code, or you hook up a meter to port and count the needle swings. Usually there is a jumper you have to put in as well. 87's don't have OBD-II so generally there's no direct hookup to the computer or network.
You might want to look over at http://www.therangerstation.com
as they generally have pretty good coverage of older Rangers.