Working on the pod/instrument cluster of the 79.?? Cleaned all the connections on the cluster with deoxit, and made sure there were no obvious breaks in the foil on the back.? The foil seems to have been replaced at some point in the past as it's blue (not brown).?
Put it back in the 928 today and checked to see what's working etc.? First try, all the gauges seemed to work and were responsive (including the previously non-functioning volt meter and oil pressure).? Took it for a spin and speedo and odo still not working.? Get back to check connections etc, and head back out, and on the second start up, the volt meter and oil pressure quit working.
Also of note, on the first start, the ever present red "!"? went away when releasing the parking brake and no warning lights in the cluster.? On the second start (non-functioning oil pressure/volt gauges) I couldn't cancel or turn off the red "!".

Questions for the group.
Start with replacing the ignition switch?
Just bite the bullet and get a new instrument cluster foil (or the new circuit board that's out there)?
Any other potential culprits I should be looking at (like the sender for the speedo)?
Any simple testing procedures for the gauges to see if they are DOA?
and a final question:
Checking the voltmeter when it was working it was showing up near 15 volts, which, when measured at the battery at the back (engine running) was about 14.5 at idle.? Seems high for an OB?? Haven't looked at the alternator yet, but is there an adjustable voltage regulator for the OB (I think Valeo) alternators?? too high at idle?
Don't really want to cook the new battery.

Thanks in advance.........