One thing that helps me internalize (remember) the switch logic is knowing
that the Bentley diagrams shows each engine oil pressure switch position
with engine off.

Neil.

On Sun, Nov 8, 2015 at 11:09 AM, Dennis Haynes <d23haynes57@hotmail.com>
wrote:

..... The higher pressure switch logic is reversed as a fail safe. The
> switch closes when pressure is sufficient. As such a broken or disconnected
> wire will make the warning active.

>

--
Neil n

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