How do you shift the digital dash clock from 24 hour mode to 12 hour mode?  It has been suggested that if the proper portion of the clock circuitry is cut (by an exacto knife, for example)
that will shift the clock to 24 hour mode.  It can be reset to 12 hour mode by a small drop of appropriately placed solder to rejoin the cut circuit.

Does anyone have the definitive answer to this?

Budd Premack
86 Syncro, 88 Wolfsburg
Land of Sky-Blue Waters
Minneapolis, MN