Diagnostic tools

I have a 1995 F150 and I want to buy a diagnostic tool but from what I've seen everything is for 1996 and newer. is there anyone out there that can help me? I also own a 1988 Dodge D100 Ram that I wold like to have a code reader for also.

This location has some various code readers. The 3140 does older and newer notice cable attachments.
http://www.levineautoparts.com/equus.html

Kragen carries their #3145 model. OBD1 ford only digital numeric display. About $30. Maker discontinued but many still in Kragen stock.