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The anti-theft light on the radio flashes when the ignition is off.

I took every fuse out and tested it with an ohm meter to make sure that none of the fuses had cracks in them. All of the fuses tested good.

I purchased a Haynes manual in hopes that the electrical diagrams could help me locate the problem. Although the trip computer is in the circuits list as "5/4" I was unable to locate it in the circuits diagram. I'll admit that I'm a little confused as to the numbering logic behind the label "5/4". "5/1" refers to the console circuit board so I'm assuming that anything with "5" as the first number refers to the console. Somebody correct me if I'm wrong.

At this point I'm doubtful that the Haynes manual contains all the variations of electrical systems installed in the 850. Over the different model years I'm sure that changes were made to the electrical systems that can only be detailed by direct from the factory service manuals. I was hopeful that the clock/trip computer would have been considered a major part but apparently it is not general enough to be included on the Haynes diagrams.

If anyone out there has a 1997 850 wiring diagram and could tell me if the constant voltage circuit is protected/fused I would appreciate it. I would like to avoid ripping the dashboard apart and tracing the voltage supply by "pull-on-the-wire-and-see-where-it-goes-method" of troubleshooting.