>I have tested the wires going to the oil pressure senders and both of them
>don't light up the tester while the light in the dash is on.  What is
>making the light to come on?
>Anyone?
Just speculating here based on my limited knowledge of the system, but it
sounds like it could be a couple things. If the light comes on at ignition
on without the engine running and stays on at idle, that means the .3bar
sensor circuit is going to ground somewhere between the instrument cluster
and the sensor. If you don't see voltage on the wire by the sensor, then it
sounds to me like either the wire is shorted to ground somewhere, or the
oil pressure monitoring system is frotzed. I don't know if the .9bar wire
has voltage all the time or if it only heats up above 2000rpm though, so I
don't know what it means that it has no voltage.

John Bange
'90 Vanagon "Geldsauger"