This topic has a schematic of part of the Run circuit on a 1995 Mystique
Top image is diagramSee if it stays running when you unplug the ignition switch, you then have a short to power from a switched wire somehow. That will be a challenge. I got the diagram from
www.alldatadiy.com. Probably quickest way to get data (19 bucks). [The Ford service cd's here
Ford cds work if you are adept at CD burning (I am now) and you need the 1992.nrg file and the 2000.iso file, burn each to cd from decompressed zip file, install software. Look in General wiring information. Someone has cd's in the classifieds too.]
