At 08:01 AM 2/8/2000 -0600, John Rodgers wrote:
>The low pressure switch is normally closed, completing the circut to the
>warning light. When the ignition switch is turned on, energizing the
>circuit, but the engine is not started, the light comes on and flashes.

Right

>When the engine starts, pressue at the switch opens the connection and
>shuts off the light, thereby indicating proper oil pressure.

0.3 bar would be about 4.5 psi

>The high pressure switch is normally open, therefore there is no power
>to the light or the buzzer. If a high pressure condition comes to exist,
>such as a stuck oil check valve, etc, which could blow the seal at the
>oil filter or elsewhere, the high pressure closes the switch completing
>the circuit to the warning light and the warning buzzer, and the light
>comes on and the buzzer sounds.

Well...no.  0.9 bar is about 12 psi.  Both senders feed a circuit (the
infamous "L-board") on the panel which flashes the light and sounds the
buzzer if the .9 bar switch *does not* close before 2000 rpm.

cheers
david

David Beierl - Providence, RI
  http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"