I'm really hoping y'all can assist me with this one,

Last winter, my '87 Synro had the nasty habit of flashing the oil light /
buzzer when the tach hit about 2200 rpm and the engine was cold.  No
problem, I would just let the engine warm up a little and then go with no
subsequent arousal of the oil light.  Just to be thorough, I replaced the
rear oil pressure switch, the one behind the belts and all of a sudden, the
oil light / buzzer came on immediately after starting the car and stayed on.
This happened in the middle of my recent trip to Arizona so I rigged a test
light to that rear oil pressure switch (light on when key on, goes out when
engine cranks) and hung it from the A/C condenser housing so I could see it
in the rear view.  Then I destroyed the little clapper in the instrument
panel that allows the light/buzzer to do it's thing.  Now, the system was
almost perfect but failed to account for the front oil pressure switch
(plus, was afraid it would come on during daytime and I wouldn't pick up on
it) so I replaced the entire instrument panel with a better used one
(odometer wasn't working either).  After hooking everything up EXCEPT the
oil pressure wiring in the engine bay, the light/buzzer come on right after
starting the vanagon.  My question is, with no signal coming forward from
the engine bay does the circuit know that something is awry and sound the
alarm?  Should I disconnect my test light and go through the acrobatics of
reconnecting the rear oil pressure switch (mirror on a stick and 90 degree
pliers)?  Or does this mean that my new oil pressure switch is faulty as
well?  Any thoughts of other stuff to check?  I should mention that I've
tested the front oil pressure switch and it is not to blame.

Ben Beasley
1987 Syncro Vanagon GL "Babe, the Big Blue Ox"