Having the same part number does not guarantee "plug-and-play" functionality. Do a search on "version coding" - some of the newer electronic modules need to be informed of their operating environment and different engines or other features vary from car to car. Its kind of like getting the correct printer driver for your printer and version of windows.

Some modules can be version coded by the user, like the climate control panel but others (like instrument clusters) need to be version coded via the Star Diagnostic System.

If your car runs OK with the replacement cluster I'd send your original out to be repaired then swap it back into the car.

I'm afraid I don't have any info about your 806/807 issue.

Tim

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98 Dodge-Cummins pickup (137K)
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