Shift light shenanigans

[chris.miller at infofoundry.com (Miller, Chris)]

Don Walter <dswalterwi@gmail.com> writes:
...
 I've had my upshift light flash once or twice randomly as well.
Normally it 
doesn't work. Not sure why but it doesn't in either of my sciroccos.
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On my Audi, the upshift light is run off the same vacuum line that leads
to the advance/retard vac. cylinder on the distributor.  The diaphragm
on these often fails, and the shift light goes out (vac leak).  Might be
worth a check.

Chris