First of all thanks to all that responded to my issue and led me to the
problem. I checked the wire going to the oil pressure switch and it was
connected and no insulation scraped away or any iffy spots in the wire. I looked
again at the 2 point connector with a better light and saw what should have
been  shiny copper was a bit green-the AHAH moment! I scraped some of this
corrosion  off and tried to get in there with a small piece of sandpaper
over a small  screwdriver blade and then sprayed with some electrical cleaner
and fired her  up. Got the RPM's up over 2200 and no buzzer or light! Really
glad to not be  changing that sensor as looks like it could be a PITA to
access. I really was  hoping to clean that connector a bit better using my new
snap on connector tool  (red handle one). Does anyone on the list know how I
can use this 6-way tool to  get the spade out of the plastic connector. I
don't know from which side I need  to go in or whether to use the little fork
on the male spade or the  narrow blade on the female. That may be hard to
explain with words but I  don't want to damage anything or use the wrong
approach or amount of force. Just  want to get it really clean so this doesn't
cause any more near coronaries from  the buzzer. Thanks again list for all
the help. Now back to the AC issue in a  separate post.

David  Clarkson
1990 Westfalia